Patton 3028 Turbo User Manual

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STATISTICAL MULTIPLEXER

Doc #: 154001UA

Part #: 07M3028-A

3028 Turbo

(CTS 2031

INSTALLATION AND OPERATIONS MANUAL

May 31, 2000

TURBO

)

An ISO-9001

Certified Company

STATISTICAL MULTIPLEXER

Doc #: 154001UA

Part #: 07M3028-A

3028 Turbo

(CTS 2031

INSTALLATION AND OPERATIONS MANUAL

TURBO

)

An ISO-9001

Certified Company

PrefacePreface

Preface

PrefacePreface

AUDIENCE ANDAUDIENCE AND

AUDIENCE AND

AUDIENCE ANDAUDIENCE AND OBJECTIVESOBJECTIVES

OBJECTIVES

OBJECTIVESOBJECTIVES

RELATED DOCUMENTSRELATED DOCUMENTS

PROPRIETARY NOTICEPROPRIETARY NOTICE

PROPRIETARY NOTICE

PROPRIETARY NOTICEPROPRIETARY NOTICE

SERVICESERVICE

SERVICE

SERVICESERVICE

This manual contains information about the installation and operation of the

3028Turbo (CTS 2031 Turbo) Statistical Multiplexer. The manual is intended for

use by the technician installing the equipment and the operator using the equip-

ment. This manual assumes that its user is familiar with basic telecommunica-

tions and computer terminology.

2980-A2-GN30 DCX 840 Installation, Operation and Maintenance Manual

2985-A2-GN30 DCX 840 Installation, Operation and Maintenance Manual

The information contained herein is proprietary and confidential to Patton

Electronics Co. Any reproduction or redistribution of this publication, in whole or

in part, is expressly prohibited unless written authorization is given by Patton

Electronics Co.

Patton Electronics Co. (hereafter referred to as Patton) warrants that its equipment

is free from any defects in materials and workmanship. The warranty period shall

be two years from the date of shipment of equipment. Pattons sole obligation

under its warranty is limited to the repair or replacement of the defective equip-

ment. This warranty will not extend to equipment subjected to accident, misuse,

alterations or repair not made by Patton or authorized by Patton in writing.

All warranty and non-warranty repairs must be returned freight prepaid and

insured to Patton Electronics. All returns must have a Return Materials Authoriza-

tion number on the outside of the shipping container. This number may be ob-

tained from Patton Electronics Technical Services at:

PUBLICATION NOTICEPUBLICATION NOTICE

PUBLICATION NOTICE

PUBLICATION NOTICEPUBLICATION NOTICE

Tel: (301) 975-1007;

email: support@patton.com;

or, Web: http://www.patton.com.

NOTE: Packages received without an RMA number will not be accepted.

Patton Electronics technical staff is also available to answer any questions that

might arise concerning the installation or use of your Patton devices. Technical

Service hours: 8AM to 5PM EST, Monday through Friday.rations or repair not

made by Patton or authorized by Patton in writing.

This manual has been compiled and checked for accuracy. The information in this

manual does not constitute a warranty of performance. Patton reserves the right to

revise this publication and make changes from time to time in the content thereof.

Patton assumes no liability for losses incurred as a result of out-of-date or incorrect

information contained in this manual.

DCX is a trademark of AT&T Paradyne.

ENQ/ACK is a registered trademark of Hewlett-Packard Corporation.

Paradyne in a registered trademark of AT&T Paradyne.

Tandem is a registered trademark of Tandem Corporation.

T-Pause is a registered trademark of Tandem Corporation.

Wang is a registered trademark of Wang Laboritories, Inc.

2030 Statistical Multiplexer is a registered trademark of AT&T Paradyne.

154001UA i

WARRANTIES: Patton Electronics Co. (hereafter referred to as Patton) warrants that its

equipment is free from any defects in materials and workmanship. The warranty period

shall be two years from the date of shipment of equipment. Pattons sole obligation

under its warranty is limited to the repair or replacement of the defective equipment,

provided it is returned to Patton, transportation prepaid, within a reasonable period. This

warranty will not extend to equipment subjected to accident, misuse, alterations or repair

not made by Patton or authorized by Patton in writing.

WARRANTY NOTICEWARRANTY NOTICE

WARRANTY NOTICE

WARRANTY NOTICEWARRANTY NOTICE

The Patton MSDs generate and use radio frequency energy, and if not installed and used

properlythat is, in strict accordance with the manufacturers instructionsmay cause

interference to radio and television reception. The Patton MSDs have been tested and

found to comply with the limits for Class A computing devices in accordance with the

specifications in Subpart J of Part 15 of FCC rules, which are designed to provide reason-

able protection from such interference in a commercial installation. However, there is no

guarantee that interference will not occur in a particular installation. If the Patton MSDs

do cause interference to radio or television reception, which can be determined by

disconnecting the cables, the user is encouraged to try to correct the interference by one

or more of the following measures: moving the computing equipment away from the

receiver, re-orienting the receiving antenna, and/or plugging the receiving equipment

into a different AC outlet (such that the computing equipment and receiver are on

different branches).

The CE symbol on your Patton Electronics equipment indicates that it is in compliance

with the electromagnetic Compatibility (EMC) directive and the Low Voltage Directive

(LVD) of the European Union (EU). A Certificate of Compliance is available by contacting

Technical Support.

RADIO AND TVRADIO AND TV

RADIO AND TV

RADIO AND TVRADIO AND TV

INTERFERENCEINTERFERENCE

INTERFERENCE

INTERFERENCEINTERFERENCE

CE NOTICECE NOTICE

CE NOTICE

CE NOTICECE NOTICE

7622 Rickenbacker Drive

Gaithersburg, Maryland 20879

Phone 301 975-1000 FAX 301 975-1007

154001UAii

able of Contentsable of Contents

able of Contents

able of Contentsable of Contents

1. Introduction and Setup

Overview ......................................................................................................... 1-1

Equipment supplied ..................................................................................... 1-3

Equipment Required But Not Supplied ..................................................... 1-3

Product Terminology .................................................................................... 1- 3

Unpacking and Setup ................................................................................... 1-4

Multiplexer Factory Defaults ....................................................................... 1-5

EIA Signals ..................................................................................................... 1-6

2. Operation of the 3028 Turbo Multiplexer

Overview ......................................................................................................... 2-2

Supervisory Function Overview ................................................................. 2-2

Front Panel Operation .................................................................................. 2-3

Terminal Operation ....................................................................................... 2-5

Modes of Operation ....................................................................................... 2-5

Standby Mode/Logoff .................................................................................. 2-6

Monitor Mode ................................................................................................ 2- 6

Memory Capability ........................................................................................ 2-10

Command Mode ............................................................................................ 2-10

Resetting The Multiplexer ............................................................................ 2-75

Appendices

A. Multiplexer Command Mode Summary ........................................... A-1

B. Technical Specifications ..................................................................... B-1

C. ASCII Character Codes ....................................................................... C-1

D. Multiplexer Parity Options ................................................................. D-1

E. Hewlett-Packard Protocol ................................................................... E-1

F. Tandem T-Pause and Wang Flow Control Methods ...................... F-1

G. Flow Control Translation .................................................................... G-1

H. Factory Hardware Option Settings.................................................... H-1

I. SDLC/HDLC Protocol ......................................................................... I-1

J. EIA Signal Exceptions ......................................................................... J-1

K. Rack-Mount Installation ..................................................................... K-1

L. Vorbereitungen zur Inbetriebnahme der Gerate .............................. L-1

Index

154001UA iii

1. Introduction and Setup

20311-1

Supervisor

DCX Network Application

302 8Turbo

STATISTICAL

MU L TI PLEX ER

302 8Turbo

STATISTICAL

MU L TI PLEX ER

302 8Turbo

STATISTICAL

MU L TI PLEX ER

Point to Point Application

Supervisor

302 8Turbo

STATISTICAL

MU L TI PLEX ER

302 8Turbo

STATISTICAL

MU L TI PLEX ER

1.1.

OVERVIEWOVERVIEW

OVERVIEW

OVERVIEWOVERVIEW

Introduction and SetupIntroduction and Setup

Introduction and Setup

Introduction and SetupIntroduction and Setup

Overview .................................................................................................................................................. 1-1

Product Terminology .............................................................................................................................. 1-3

Equipment Supplied ...............................................................................................................................1-3

Equipment Required But Not Supplied ..............................................................................................1-3

Unpacking and Setup .............................................................................................................................1-4

Multiplexer Factory Defaults ................................................................................................................ 1-5

EIA Signals ............................................................................................................................................... 1-6

The 3028 Turbo (CTS 3028 Turbo (CTS 2031 Turbo)) Statistical Multiplexer has two

primary applications: Point-to-Point and DCX networking (Figure 1-1). Point-to-

Point operations in a single link environment supports up to eight terminals. All

of the DCX networking applications, including direct connections to a DCX 840 or

DCX 850 are supported. The 3028 Turbo (CTS 3028 Turbo (CTS 2031 Turbo)) also

supports the onward linking facilities through a DCX 825/871.

The SDLC/HDLC protocol is a standard feature that supports the bit-oriented

synchronous protocols.

154001UA 1-1

Figure 1-1. Multiplexer Product Application ExamplesFigure 1-1. Multiplexer Product Application Examples

Figure 1-1. Multiplexer Product Application Examples

Figure 1-1. Multiplexer Product Application ExamplesFigure 1-1. Multiplexer Product Application Examples

2031 Turbo Statistical Multiplexer

The multiplexer combines data traffic from up to eight sources into a high-speed

composite link. Channel speeds supported are from 75bps to 19,200bps with an

automatic channel speed detection (AUTOBAUD) option up to 9,600bps. The

buffer management allows storage of 16K bytes to be shared on demand by the

channels. Each channel is assigned a minimum of 372 bytes of buffer space to

prevent lockout. Because of the buffering action of the 2031, the data rates on the

channel side of the multiplexer may total several times the actual link rate without

data loss. The multiplexer will handle an aggregate of 76,800 bps in constant full-

duplex traffic (with flow control) and a 64,000K bps link without loss of data.

The multiplexer can transmit control messages end-to-end to handle such things

as break propagation, EIA signal propagation, and autobaud speeds. The control

messages are transparent to the user. In addition, any of the EIA interface outputs

can be forced high or low through the user interface.

Multiplexer configuration and operation monitoring is accomplished in a variety

of ways. An ASCII asynchronous terminal can be attached to the supervisory port

on the back panel or to a data channel that has the supervisory access enabled, or

the front panel push-buttons and LCD display can be used. Another method of

access is from a remote multiplexer in a point-to-point or a DCX network applica-

tion. Access to the supervisory function can be password protected for security.

All parameters are contained in nonvolatile storage.

The 3028 Turbo (CTS 3028 Turbo (CTS 2031 Turbo)) multiplexer is designed to be a

cost-effective point-to-point multiplexer. At the same time, it is fully compatible

with the CTS 2031 and the AT&T Paradyne DCX family of multiplexers and can

serve as an 8-channel node in a DCX network.

154001UA1-2

1. Introduction and Setup

PRODUCTPRODUCT

PRODUCT

PRODUCTPRODUCT TERMINOLOGYTERMINOLOGY

TERMINOLOGY

TERMINOLOGYTERMINOLOGY

The following terms are used when referring to the multiplexer:

CHANNEL

LINK The high-speed composite multiplexed interface.

CHANNEL

PORT

LINK PORT The physical interface for a link.

SUPERVISORY

PORT

DCE Data Communication Equipment -- This can be any

DTE Data Terminal Equipment -- This can be any terminal or

One of the eight possible low-speed port interfaces.

The physical interface for a channel.

The connector reserved for supervisor functions, such

as configuring channel parameters or monitoring status

and statistics.

Modem attached to the multiplexer on the Composite

port.

host attached to the multiplexer on a channel port.

EQUIPMENTEQUIPMENT

EQUIPMENT

EQUIPMENTEQUIPMENT SUPPLIEDSUPPLIED

SUPPLIED

SUPPLIEDSUPPLIED

EQUIPMENTEQUIPMENT

EQUIPMENT

EQUIPMENTEQUIPMENT REQUIRED BUTREQUIRED BUT

REQUIRED BUT

REQUIRED BUTREQUIRED BUT NOT SUPPLIEDNOT SUPPLIED

NOT SUPPLIED

NOT SUPPLIEDNOT SUPPLIED

LCD Liquid Crystal Display -- This is located on the front

panel of the 3028 Turbo (CTS 3028 Turbo (CTS 2031

Turbo)). It displays two lines of 16 characters each.

NETWORK

APPLICATION

POINT-TO-POINT

APPLICATION

A shielded, Male to Female, straight through cable is supplied to connect the

multiplexer Composite Port to an external modem.

Customer-supplied RS-232-C I/O cables from each DTE to standard EIA 25-pin

female connectors are required. A special cable is needed when using the

Tandem T-Pause® Flow Control application (refer to Appendix F).

Modem tail circuit applications require crossover cables (Figure 1-3).

This term refers to the use of the 3028 Turbo (CTS 3028

Turbo (CTS 2031 Turbo)) multiplexer in a network of one

or more DCX devices.

This term refers to the use of the 3028 Turbo (CTS 2031

Turbo) multiplexer in direct communications with

another 3028 Turbo (CTS 2031 Turbo) multiplexer. This

application involves only two devices.

Note

Shielded RS-232-C I/O cables

are required.

154001UA 1-3

2031 Turbo Statistical Multiplexer

The following lists the procedure for unpacking and setting up the 3028 Turbo

(CTS 2031 Turbo).

1. Remove the 3028 Turbo (CTS 2031 Turbo) from the box and place it on a

flat surface.

2. MODEM CONNECTION. Connect the supplied composite link cable to

the port labeled COMPOSITE on the rear panel (Figures 1-2) and then to

the modem. The Composite port is configured as a DTE to allow use of a

shielded, Male to Female, straight through cable to connect the Modem.

3. Connect the customer-supplied shielded, Male to Male, RS-232-C cables to

the selected ports and the DTEs, respectively.

4. The voltage selector is set to the proper line voltage for the area of the

world where the unit will be used at the factory. For the United States the

switch is set to 115V. Plug the female end of the power cable into the

receptacle on the rear panel and connect the other end to the power source.

The unit is operational when the POWER LED lights.

5. After the 3028 Turbo (CTS 2031 Turbo) has been attached to the proper

power source, it performs a series of tests to insure the integrity of the

system components. If the tests are passed, the multiplexer LCD displays:

UNPUNP

ACKING ANDACKING AND

UNP

ACKING AND

UNPUNP

ACKING ANDACKING AND

SETUPSETUP

SETUP

SETUPSETUP

SYSTEM READY

00:00:00

20312-51

and the system configuration can be performed. If any of the tests fail, the

LCD displays a message (refer to System Error Messages section). When

this message is displayed, cycle the power. If the error occurs again

contact your CTS service representative.

6. Connect a standard ASCII terminal, if used, to the 3028 Turbo (CTS 2031

Turbo) using a customer-supplied, straight-through, RS-232-C I/O cable at

the port labeled SUPERVISORY.

STATISTICAL

MULTIPLEXER

DATA LINK F LO W

POWE R LOSS DOWN CON TRO L

COMPOSI T E

SU PE R VISOR Y

PORT 7

PORT 8

PORT 5

PORT 6

PORT 3

PORT 4

Note

Shielded RS-232-C I/O cables are required.

TU RBO

PORT 1

PORT 2

3028

NEX T L AST SEL M ON/ CL

CAUTIO N:

FOR CONTINUED

PROTECTION A GAINST

RISK OF FIRE

RE PLAC E ON L Y

WITH SAME TYPE

OF FUSE

Figure 1-2. Front & Rear Panel, Model 3028TurboFigure 1-2. Front & Rear Panel, Model 3028Turbo

Figure 1-2. Front & Rear Panel, Model 3028Turbo

Figure 1-2. Front & Rear Panel, Model 3028TurboFigure 1-2. Front & Rear Panel, Model 3028Turbo

20311-2

154001UA1-4

1. Introduction and Setup

Connect the terminal to the power source and turn on the terminal.

PRESS: <supervisor logon character>

(default = CTRL + V)

The System Menu is Displayed

Check the following items if the System Menu does not appear.

 Terminal cabling

 Terminal power switch ON

 Terminal speed 9600 (refer to terminal manual)

 Multiplexer <supervisory logon character> is decimal 022

(default = CTRL + V) (refer to Appendix D)

 Multiplexer stop bits (refer to Chapter 2)

 Multiplexer parity (refer to Appendix D)

For additional information on these items refer to the indicated chap-

ters.

MULMUL

TIPLEXERTIPLEXER

MUL

TIPLEXER

MULMUL

TIPLEXERTIPLEXER

FACTORFACTOR

FACTOR

FACTORFACTOR DEFDEF

AULAUL

DEF

AUL

DEFDEF

AULAUL

TSTS

The multiplexer is configured at the factory with a set of default parameters.

Refer to Tables 1-1 and 1-2 for the default settings.

If you want to change any of the multiplexer parameters, refer to the appropri-

ate paragraph in Chapter 2.

Table 1-1. Supervisory Port DefaultsTable 1-1. Supervisory Port Defaults

Table 1-1. Supervisory Port Defaults

Table 1-1. Supervisory Port DefaultsTable 1-1. Supervisory Port Defaults

COMMAND PARAMETER

SUPERVISORY PARAMETERS

SPEED 9600

DATA BITS 8 STOP BITS 1 PARITY NONE/SPACE RV FL CTL NONE (Reverse Flow Control)

DEFAULT

SETTING

154001UA 1-5

2031 Turbo Statistical Multiplexer

Table 1-2. Channel Port Default Configuration SettingsTable 1-2. Channel Port Default Configuration Settings

Table 1-2. Channel Port Default Configuration Settings

Table 1-2. Channel Port Default Configuration SettingsTable 1-2. Channel Port Default Configuration Settings

COMMAND PARAMETER

CHANNEL PARAMETERS

LINK PARAMETERS

DEFAULT

SETTING

SPEED 9600

TYPE ASYNC DATA BITS 8 STOP BITS 1 PARITY NONE/SPACE FL CTL (Flow Control) DC3/DC1 FL CTL TR (Flow Control Translation) NO RV FL CTL (Reverse Flow Control) NONE EIA PROP (EIA Propigation) NO BRK PROP (Break Propagation) NO ECHOPLEX NO FLYBACK (Flyback Buffering) NO CTS-RTS (Clear-to-Send Ready-to-Send) NO MSGS ENAB (Messages Enabled) NO SPVR ENAB (Supervisor Enabled) NO INAC DISC (Inactivity Disconnect) NO DISC CHAR (Disconnect Character) CTL-T LINK CLK SOURCE (Link Clock Source) EXTERN

LINK CLK RATE (Link Clock Rate) 9600

RS-232-C is defined in terms of a DTE at one end and a DCE at the other. Normally

this would be a terminal or host (DTE) and a modem (DCE). The 3028 Turbo (CTS

2031 Turbo) multiplexer is designed to play the role of a DCE normally. When

attached to a modem on the channel port however, the 3028 Turbo (CTS 2031 Turbo)

plays the role of a DTE with EIA signals exchanged through a special cable.

Figure 1-3 identifies the EIA signal propagation. EIA signal propagation must be

enabled for the channel, for signal propagation to take place.

The Composite port is configured as a DTE to allow it to be connected to a modem

(DCE) type device. The following signals are active on the Composite port: TXD

(2), RXD (3), TXC (15), RXC (17), RTS (4), CTS (5), DCD (8), DTR (20) and XTXC

(24). The composite link is synchronous, full duplex and point to point. Front

panel configuration allows the 3028 Turbo (CTS 2031 Turbo) to provide clocking on

the XTXC signal lead as well as take clocking from the RXC and TXC signal leads.

If DCD becomes inactive the 3028 Turbo (CTS 2031 Turbo) assumes the link is

down. RTS will be provided by the 3028 Turbo (CTS 2031 Turbo). CTS must be

returned by the modem for the 3028 Turbo (CTS 2031 Turbo) to send data and

establish a link. DTR is forced active by the 3028 Turbo (CTS 2031 Turbo) software.

EIA SIGNALSEIA SIGNALS

EIA SIGNALS

EIA SIGNALSEIA SIGNALS

154001UA1-6

tandard Terminal / Host Connection

1. Introduction and Setup

Host

Pin-to-

DTE DTE

DRS

RTS

DTR

CTS

DCD

DSR

TXD

RXD

GND

Cable

Pin-to-

Cable

DRS

RTS

DTR

CTS

DCD

DSR

TXD

RXD

GND

Multiplexer Multiplexer

Tail Circuit Application

DRS

RTS

DTR

CTS

DCD

DSR

TXD

RXD

GND

Pin-to-

Cable

Crossover

Cable

DCEDTE

CTS

DCD

DSR

DRS

RTS

DTR

RXD

TXD

GND

Terminal

Modem

Multiplexer

Optional Under Software Control

Physical Propagation

Software Propagation

Figure 1-3. EIA SignalsFigure 1-3. EIA Signals

Figure 1-3. EIA Signals

Figure 1-3. EIA SignalsFigure 1-3. EIA Signals

154001UA 1-7

Multiplexer

Tail Circuit

20311-3

2031 Turbo Statistical Multiplexer

The 3028 Turbo (CTS 2031 Turbo) provides Link Down and Data Loss alarm

signals as TTL (0 to +5V) indications on the Supervisor port.

The Link Down alarm signal is indicated on pin 9 as a 0V level as long as the

datalink between the 3028 Turbo (CTS 2031 Turbo)s is not operational. +5V is

provided as long as the datalink between the 3028 Turbo (CTS 2031 Turbo)s

operational. Pin 9 is an Open Collector output.

The Data Loss alarm signal is indicated on pin 10 as a 0V level as long as the

data loss LED is illuminated and +5V is provided as long as the data loss LED is

extinguished. Pin 10 is an Open Collector output.

The 3028 Turbo (CTS 2031 Turbo) provides a Crypto Reset signal as an RS-232-C

signal indication on the Composite port.

The positive signal for Crypto Reset is provided on pin 11. The negative signal is

provided on pin 12 The Crypto reset pulse is 150ms in duration and occurs every

4, 8, 12 or 16 seconds as selected by jumpers J15 and J16 and the table below.

JP16 JP15 Time Delay

ON ON 4 Seconds

SUPERVISORSUPERVISOR

SUPERVISOR

SUPERVISORSUPERVISOR

ALARM SIGNALSALARM SIGNALS

ALARM SIGNALS

ALARM SIGNALSALARM SIGNALS

CRYPTO RESETCRYPTO RESET

CRYPTO RESET

CRYPTO RESETCRYPTO RESET

SIGNALSIGNAL

SIGNAL

SIGNALSIGNAL

OFF ON 8 Seconds

ON OFF 12 Seconds

OFF OFF 16 Seconds

150mS

4, 8, 12 or 16

Seconds

Pin 11

Pin 12

The first pulse is sent after the Link Down indication has occured for the length

of time specified by the selection jumpers and continues to occur at the selected

interval until the link is operational once more.

150mS

20311-4

154001UA1-8

2. Operation of the 3028 Turbo Multiplexer

2. Operation of the 3028 T2. Operation of the 3028 T

2. Operation of the 3028 T

2. Operation of the 3028 T2. Operation of the 3028 T

Overview ......................................................................................................................................... 2-2

Supervisory Function Overview ................................................................................................. 2-2

Front Panel Operation ...................................................................................................................2-3

Terminal Operation .......................................................................................................................2-5

Modes of Operation ....................................................................................................................... 2-5

Standby Mode/Logoff ................................................................................................................... 2-6

Monitor Mode ................................................................................................................................. 2-6

System Error Messages .........................................................................................................2-8

Monitor Mode Events ...........................................................................................................2-9

Memory Capability ..................................................................................................................... 2-10

Command Mode .......................................................................................................................... 2-10

Command Mode Definitions ............................................................................................ 2-11

Channel Parameters ........................................................................................................... 2-15

Channel Speed ........................................................................................................... 2-16

Channel Type ............................................................................................................. 2-19

Channel Data Bits ...................................................................................................... 2-20

Channel Stop Bits ...................................................................................................... 2-22

Channel Parity ........................................................................................................... 2-23

Channel Flow Control .............................................................................................. 2-25

Channel reverse Flow Control ................................................................................ 2-27

Channel Flow Control Translation ......................................................................... 2-29

Channel EIA Propagation ........................................................................................ 2-30

Channel Break Propagation ..................................................................................... 2-32

Channel Echoplex ..................................................................................................... 2-33

Channel Flyback Buffering ...................................................................................... 2-35

Channel CTS-RTS Control ....................................................................................... 2-36

Channel Messages Enabled ..................................................................................... 2-38

Channel Supervisor Enabled ................................................................................... 2-40

Channel Inactivity Disconnect ................................................................................ 2-42

Channel Disconnect Character ............................................................................... 2-43

Link Parameters .................................................................................................................. 2-46

Link Clock Source ..................................................................................................... 2-46

Link Clock Rate .......................................................................................................... 2-47

Supervisory Parameters .................................................................................................... 2-49

Copy Parameters ................................................................................................................ 2-51

Channel Statistics ............................................................................................................... 2-52

Link Statistics ...................................................................................................................... 2-55

Local Channel Loopback ................................................................................................... 2-58

Remote Channel Loopback ............................................................................................... 2-60

Local Link Loopback ......................................................................................................... 2-61

Channel Reset ..................................................................................................................... 2-62

Link Reset ............................................................................................................................ 2-63

Statistics Reset .................................................................................................................... 2-64

Channel Validate ................................................................................................................ 2-64

Channel Status .................................................................................................................... 2-66

Remote Signon .................................................................................................................... 2-68

Remote Signoff .................................................................................................................... 2-70

Set System Password ......................................................................................................... 2-71

Set System Banner .............................................................................................................. 2-72

Set System Time .................................................................................................................. 2-72

Disable/Enable Front Panel ............................................................................................. 2-73

Monitor Mode ..................................................................................................................... 2-74

Logoff ................................................................................................................................... 2-75

Resetting The Multiplexer ......................................................................................................... 2-75

urbourbo

urbo

urbourbo

MultiplexerMultiplexer

Multiplexer

MultiplexerMultiplexer

154001UA 2-1

3028 Turbo Statistical Multiplexer

This chapter explains the different methods you can use to configure, monitor

and control the multiplexer operations. It provides step-by-step instructions for

each method and summary areas for quick reference.

When the multiplexer is attached to a DCX multiplexer, there are three ways to

operate the supervisory functions:

1. The front panel keys and LCD display.

2. A terminal connected to the supervisory port.

3. A terminal connected to any asynchronous channel port enabled for the

supervisory function.

4. A terminal connected via the DCX network to an enabled supervisor

channel.

When the multiplexer is being used in Point-to-Point applications, there are three

additional operating methods:

1. The remote front panel interface.

2. A terminal connected to a remote supervisory port.

OVERVIEWOVERVIEW

OVERVIEW

OVERVIEWOVERVIEW

SUPERVISORSUPERVISOR

SUPERVISOR

SUPERVISORSUPERVISOR

FUNCTIONFUNCTION

FUNCTION

FUNCTIONFUNCTION OVERVIEWOVERVIEW

OVERVIEW

OVERVIEWOVERVIEW

3. A terminal connected to a remote asynchronous channel port enabled for

the supervisory function.

NoteNote

Note

NoteNote

In general only one terminal, local or remote, may be signed on as supervisor at the multiplexer at any given time. Supervisory functions at the front panel, however, may be carried on concurrently with a terminal supervisor.

Any of the terminals in Figure 2-1 may be used to access supervisory functions in

either 3028 Turbo (CTS 2031 Turbo). In addition, when the multiplexer is used in a

DCX network (Figure 2-1) any attached terminal can access the DCX supervisory

functions remotely. Refer to the DCX 850 Installation and Operation Manual, 2985-

A2-GN30, for procedures.

2-2 154001UA

DCX 840/850

LSC ARQ ARQ

2. Operation of the 3028 Turbo Multiplexer

FRONT PANELFRONT PANEL

FRONT PANEL

FRONT PANELFRONT PANEL OPERAOPERA

OPERA

OPERAOPERA

TIONTION

TION

TIONTION

STATISTICAL

MULTIPLEXER

POWER LOSS DOWN CONTROL

3028 Turbo

12345678SUPV

Figure 2-1. Remote Supervisory Access in a DCX Network ConfigurationFigure 2-1. Remote Supervisory Access in a DCX Network Configuration

Figure 2-1. Remote Supervisory Access in a DCX Network Configuration

Figure 2-1. Remote Supervisory Access in a DCX Network ConfigurationFigure 2-1. Remote Supervisory Access in a DCX Network Configuration

There are four push buttons on the front panel that can be used

to configure the multiplexer (Figure 2-2). These push buttons

are:

 NEXT

 LAST

 SELECT

 MON/CLR (Monitor/Clear)

12345678SUPV

3028 Turbo

30 28 T URBO

DATA LINK FLOW

Figure 2-2. Multiplexer Front PanelFigure 2-2. Multiplexer Front Panel

Figure 2-2. Multiplexer Front Panel

Figure 2-2. Multiplexer Front PanelFigure 2-2. Multiplexer Front Panel

NEXT LAST SEL MON/CL

20312- 1

20312-50

The functions of these push buttons are summarized in Table 21.

NoteNote

Note

NoteNote

Use of these push buttons in COMMAND mode may be disabled if the front panel has been disabled via the CRT Disable/Enable Front Panel command.

154001UA 2-3

3028 Turbo Statistical Multiplexer

ggreg

Table 2-1. Front Panel Push Button DescriptionsTable 2-1. Front Panel Push Button Descriptions

Table 2-1. Front Panel Push Button Descriptions

Table 2-1. Front Panel Push Button DescriptionsTable 2-1. Front Panel Push Button Descriptions

PUSH BUTTON DESCRIPTION

NEXT This push button allows entry into COMMAND mode (refer

LAST In COMMAND mode this push button is used to move to

SELECT This push button is used in COMMAND mode to enter the

MON/CLR This push button is used in COMMAND mode to exit a

to COMMAND MODE section) when the start-up messa is displayed or the device is in MONITOR mode (refer to MONITOR MODE section).

In COMMAND mode (COMMAND MODE displayed on the first line of the LCD) this push button moves to the next command. If the LCD displays a parameter (parameter displayed on the first line of the LCD) this push button causes the next parameter to appear. This push button does not update the parameter.

the previous command, parameter or option dependin the level of operation at any does not update the parameter.

displayed parameter or update use of the selected option.

parameter without makin COMMAND MODE / CHNL PARAMETERS display.

If you are already at the command prompt, this push button lo

s off as supervisor and enters MONITOR mode. If this push button is pressed while in MONITOR mode, the LCD will display:

iven time. This push button

changes and return to the

This display will remain until the NEXT push button is pressed to enter COMMAND mode or the MON/CLR push

The multiplexer has four LED displays on the front panel. Their functions are

described in Table 2-2.

Table 2-2. Panel LED DescriptionsTable 2-2. Panel LED Descriptions

Table 2-2. Panel LED Descriptions

Table 2-2. Panel LED DescriptionsTable 2-2. Panel LED Descriptions

LED DESCRIPTION

POWER This LED indicates that the power supply is operating. If

LINK DOWN This LED, when lit, indicates that the communication link

FLOW CONTROL This LED is turned on when buffer usage reaches 65%

DATA LOSS This LED is lit for ten seconds when data is lost or when

this LED does not li

has failed, when flashin

and is turned off when the total buffer usa 45%. These limits indicate the thresholds for potentially invokin

or releasing channel flow control signals.

the a

ate input limit of 76.8Kbps has been exceeded.

ht and the system is plugged in, a

, indicates a loopback state.

e drops below

2-4 154001UA

2. Operation of the 3028 Turbo Multiplexer

TERMINALTERMINAL

TERMINAL

TERMINALTERMINAL OPERAOPERA

OPERA

OPERAOPERA

MODES OFMODES OF

MODES OF

MODES OFMODES OF OPERAOPERA

OPERA

OPERAOPERA

TIONTION

TION

TIONTION

TION

TIONTION

Configuration of the multiplexer can be done through the use of an attached

terminal. The attached terminal can be any standard asynchronous terminal. A

series of screens enable you to configure the multiplexer. The keys available for

use are:

 RETURN or ENTER

The RETURN or ENTER key is used to update the selected

option, to exit a menu without making changes, or to access the

Main Menu from MONITOR mode.

 BACKSPACE or DELETE

The BACKSPACE or DELETE key is used to correct mistakes

during entry before pressing the RETURN key.

 Number Keys

The number keys are used to select options from the menu

screens.

Front Panel

There are three modes of operation:

STANDBY MODE This mode displays the message SYSTEM READY

and the system clock.

MONITOR MODE This mode allows for the display of system

events.

COMMAND MODE This mode provides access to the supervisory

functions.

Terminal

There are three modes of operation:

LOGOFF This mode causes the terminal to display the

message SUPERVISOR LOGOFF @ hh:mm:ss

where hh:mm:ss is the current system time.

MONITOR MODE This mode allows for the display of system

events.

COMMAND MODE This mode provides access to the supervisory

functions.

154001UA 2-5

3028 Turbo Statistical Multiplexer

When the multiplexer is in STANDBY mode, the system event displays are

stored and displayed when monitor mode is entered. The display that is shown

during the STANDBY mode is:

SYSTEM READY

00:00:00

20312-51

When the multiplexer terminal is in LOGOFF mode the terminal displays

SUPERVISOR LOGOFF @ hh:mm:ss where the time displayed is the current

system time. The terminal will remain logged off until the supervisor logon

character is pressed to enter COMMAND mode. From COMMAND mode,

changes to the parameters may be made or MONITOR mode can be entered.

When the multiplexer is in MONITOR mode the system displays the system

events as they occur. Entry into MONITOR mode also constitutes a supervi-

sory signoff allowing other channels access to the supervisory functions.

The first display after entering MONITOR mode is the current PROM level

installed (REV nnn.nn). After this, the events that have occurred are displayed.

The message queue holds 16 messages and after they are displayed they cannot

be recalled. The messages can be displayed on either the terminal or LCD,

whichever enters MONITOR mode first. If more than 16 messages occur, only

the latest 16 are kept to be displayed.

STST

ANDBY MODE/ANDBY MODE/

ANDBY MODE/

STST

ANDBY MODE/ANDBY MODE/

LOGOFFLOGOFF

LOGOFF

LOGOFFLOGOFF

MONITOR MODEMONITOR MODE

MONITOR MODE

MONITOR MODEMONITOR MODE

Note

When you are signed on to a remote 3028 Turbo (CTS 2031 Turbo), the messages displayed as remote events are actually local events to your 3028 Turbo (CTS 2031 Turbo).

Front Panel Access

MONITOR mode is entered by pressing the MON/CLR push button once from

the STANDBY or COMMAND modes and by pressing the MON/CLR push

button twice from a command, parameter or option in COMMAND mode. The

LCD will display the following until an event occurs for display.

When you enter MONITOR mode and there are events in the queue, they will

be displayed, earliest first, for a minimum of two seconds each.

In a point-to-point application, events are displayed at both the local and the

remote ends when each LCD is in the MONITOR mode (Figures 2-3 and 2-4).

The first line displays the time the event occurred and the second line displays

the event that occurred (Table 2-3). Events are displayed in the following format:

MONITOR MODE

REV 938 14.0

20312-52

2-6 154001UA

EVENT @ 10:00:00

CHNL 1 RESET

Figure 2-3. Local Event DisplayFigure 2-3. Local Event Display

Figure 2-3. Local Event Display

Figure 2-3. Local Event DisplayFigure 2-3. Local Event Display

R EVT @ 10:00:00

CHNL 1 RESET

Figure 2-4. Remote Event DisplayFigure 2-4. Remote Event Display

Figure 2-4. Remote Event Display

Figure 2-4. Remote Event DisplayFigure 2-4. Remote Event Display

The multiplexer uses a 24-hour clock for time displays and does not have the date maintained as part of the time stamp. Queued messages are deleted when the system clock goes from 23:59:59 to 00:00:00.

2. Operation of the 3028 Turbo Multiplexer

20312-53

20312-54

Note

MONITOR MODE

REV 938 14.0

To enter STANDBY mode:

PRESS: MON/CLR

To enter COMMAND mode:

PRESS: NEXT

Terminal Access

To enter MONITOR mode from the terminal main menu:

TYPE: 22

PRESS: RETURN

The terminal indicates that MONITOR mode is entered with a screen display:

20312

When an event occurs (Figure 2-5) it is displayed on the terminal:

MONITOR MODE

EVENT @ 10:00:00 event

REMOTE EVENT @ 10:00:00 event

Figure 2-5. Event MessagesFigure 2-5. Event Messages

Figure 2-5. Event Messages

Figure 2-5. Event MessagesFigure 2-5. Event Messages

20312

154001UA 2-7

3028 Turbo Statistical Multiplexer

To enter COMMAND mode ,

PRESS: <supervisor logon character>

(default = CTRL + V)

If the password protection is in use, you are prompted to enter the correct

password. Enter the password and press RETURN; the Main Menu will then

be displayed.

The SYSTEM ERROR message displayed in diagnostic failure at start-up pro-

vides information as to the type of failure detected. The format of the informa-

tion is as follows:

SYSTEM ERROR n

20312-55

Where n is one of the following:

M - EPROM checksum failed., U41 & U42

A - memory A000-AFFF failed, RAM U40

B - memory B000-BFFF failed, RAM U40

C - memory C000-CFFF failed, RAM U39

D - memory D000-DFFF failed, RAM U39

E - memory E000-EFFF failed, RAM U38

F - memory F000-FFFF failed, RAM U38

1 - Port 1 or Supervisory Port failed - SCC U29 or U33

2 - Port 2 failed - SCC U29

3 - Port 3 failed - SCC U30

4 - Port 4 failed - SCC U30

5 - Port 5 failed - SCC U31

6 - Port 6 failed - SCC U31

7 - Port 7 failed - SCC U32

8 - Port 8 failed - SCC U32

The order of testing is as listed above. Any one failure will terminate testing.

System ErrorSystem Error

System Error

System ErrorSystem Error

MessagesMessages

Messages

MessagesMessages

2-8 154001UA

2. Operation of the 3028 Turbo Multiplexer

Monitor Mode EventsMonitor Mode Events

Monitor Mode Events

Monitor Mode EventsMonitor Mode Events

Table 2-3 lists the MONITOR mode events.

Table 2-3. MONITOR Mode EventsTable 2-3. MONITOR Mode Events

Table 2-3. MONITOR Mode Events

Table 2-3. MONITOR Mode EventsTable 2-3. MONITOR Mode Events

EVENT DESCRIPTION

CHNL n RESET* This event indicates that the indicated channel has

CHNL n FL CTL* This event reports that flow control was invoked for the

CHNL n RV FL CTL* This event indicates that a preprogrammed reverse

CHNL n ACTIVE* This event indicates that the flow control or reverse

CHNL n LOOPED* This event indicates that the channel has been put in a

LINK FAILED This event indicates that a link interface is no longer

LINK # CHL INV This event reports that the remote multiplexer has more

been reset, locally or remotely, via the terminal or front panel interface. The reset function clears the data buffers and resets any flow control or reverse flow control states at each end.

indicated channel in response to either the channel exceedin the channel speed) or the total system buffer utilization reachin locally only).

flow control si indicated channel, causin transmission temporarily (reported locally only).

flow control condition has cleared at the indicated channel throu command) (reported locally only).

loopback condition, where the data sent to the channel both inward and outward is looped back.

recevin is fails. A failure is declared after approximately 10 seconds of noncommunication and retries (reported locally only).

its flow control level (the percent is based on

65% of the multiplexer capacity (reported

nal has been received from the

the multiplexer to suspend

h normal means (not a Channel RESET

acknowledgements to its transmissions. This

enerated only when a link that has been operational

CHNL n DATA LOSS* This event reports that user channel data has been

LINK ESTABLISHED This event reports that a link has been established and

SUPVR SIGNON This event reports that a local or remote supervisor has

SUPVR SIGNOFF This event reports that a local or remote supervisor has

*n = the channel on which the event occurs.

lost.

communication can be to reestablish itself; if it is successful, this event occurs(reported locally only).

ed on.

ed off.

in. A failed link continually tries

154001UA 2-9

3028 Turbo Statistical Multiplexer

The 3028 Turbo (CTS 2031 Turbo) has sufficient nonvolatile memory so that certain

operating parameters will be retained through a power loss. The following will be

maintained through a power-off, power-on sequence:

 Channel parameters

 Supervisory port parameters

 Link parameters

 System password

 System banner (part of Main Menu)

 Any front panel inhibited status

 Any forced EIA output signals

The following are not maintained through a power-off, power-on sequence, but are

"cleared" upon system restart:

 Peak channel and link usage statistics

 System time

 Any flow control or reverse flow control XOFF states

 Any channel loopbacks

 Link loopbacks

 Detected autobaud speeds

 Propagated EIA signals

 Monitor messages

MEMORMEMOR

MEMOR

MEMORMEMOR

CAPCAP

ABILITYABILITY

CAP

ABILITY

CAPCAP

ABILITYABILITY

Command mode allows the operator to configure the multiplexer for operation

using either the multiplexer front panel or an attached terminal.

Front Panel Access

The NEXT push button accesses Command mode from Monitor mode or Standby

mode. The LCD will Display

COMMAND MODE

CHNL PARAMETERS

20312-56

SUPERVISOR BUSY displays when an attempt is made to sign on to a remote 3028

Turbo (CTS 2031 Turbo) that has a front panel already in use.

SUPERVISOR BUSY

20312-57

COMMAND MODECOMMAND MODE

COMMAND MODE

COMMAND MODECOMMAND MODE

2-10 154001UA

Terminal Access

0312-

At initial logon or from MONITOR MODE

PRESS: <supervisor logon character>

If a password entry is needed, you are prompted to enter the password. After

doing this the Main Menu (figure 2-6) displays:

S Y S T E M M E N U

SET CHANNEL PARAMETERS

SET LINK PARAMETERS

SET SUPERVISORY PARAMETERS

COPY PARAMETERS

CHANNEL STATISTICS

LINK STATISTICS

SET/CLEAR LOCAL CHANNEL LOOPBACK

SET/CLEAR REMOTE CHANNEL LOOPBACK

LOCAL LINK LOOPBACK

10.

RESET A SINGLE CHANNEL

11.

RESET ALL CHANNELS

12.

RESET LINK

(default = CTRL + V)

13.

14.

15.

16.

17.

18.

19.

20.

21.

22.

23.

2. Operation of the 3028 Turbo Multiplexer

RESET STATISTICS CHANNEL VALIDATE CHANNEL STATUS REMOTE SIGNON REMOTE SIGNOFF SET SYSTEM PASSWORD SET SYSTEM BANNER SET SYSTEM TIME DISABLE/ENABLE FRONT PANEL ENTER MONITOR MODE LOGOFF

Command ModeCommand Mode

Command Mode

Command ModeCommand Mode DefinitionsDefinitions

Definitions

DefinitionsDefinitions

ENTER 1-23 <CR> TO SELECT DESIRED FUNCTION:

Figure 2-6. Command Mode Main MenuFigure 2-6. Command Mode Main Menu

Figure 2-6. Command Mode Main Menu

Figure 2-6. Command Mode Main MenuFigure 2-6. Command Mode Main Menu

If the Main Menu does not appear, check to make sure the SUPERVISOR

ENABLED parameter is set to YES (refer to Channel Supervisor Enabled

paragraph).

If the supervisor is currently in use, the message SUPERVISOR BUSY is

returned.

LCD

The LCD display is made up of 2 lines with 16 character positions on each line.

An asterisk (*) before the channel number selection (Figure 2-7) indicates the

current selection. Use the NEXT or LAST push button to move the asterisk to

the next or previous option, respectively.

SELECT CHANNEL:

*1 2 3 4 5 6 7 8

20312-58

Figure 2-7. Asterisk Position ExampleFigure 2-7. Asterisk Position Example

Figure 2-7. Asterisk Position Example

Figure 2-7. Asterisk Position ExampleFigure 2-7. Asterisk Position Example

154001UA 2-11

3028 Turbo Statistical Multiplexer

A number sign (#) in the first position of the second line (Figure 2-8) indicates the

current value for the parameter.

CHNL n SPEED # 7200

20312-59

Figure 2-8. Number Sign Position ExampleFigure 2-8. Number Sign Position Example

Figure 2-8. Number Sign Position Example

Figure 2-8. Number Sign Position ExampleFigure 2-8. Number Sign Position Example

An n in a display will be replaced by the channel number selected.

Use the NEXT and LAST push buttons to move forward or backward through

the commands, parameters or options.

When pressed, the SELECT push button either moves from a command to a

parameter, a parameter to an option or updates the selected option.

The displays and screens shown are samples and do not necessarily reflect your

configuration.

In this chapter, the symbol indicates that the values following will

appear on the second line of the display.

The starting point for accessing commands and parameters described in this

chapter is the COMMAND MODE display (Figure 2-9).

COMMAND MODE CHNL PARAMETERS

20312-60

Figure 2-9. Command Mode DisplayFigure 2-9. Command Mode Display

Figure 2-9. Command Mode Display

Figure 2-9. Command Mode DisplayFigure 2-9. Command Mode Display

Note

When a parameter is selected to change a particular channel, you receive the following display prior to access of the options.

SELECT CHANNEL: *1 2 3 4 5 6 7 8

The commands that require channel selection are indicated in Table 2-4 by a double asterisk (**) following the command name. Factory set defaults are listed first in the options/notes column.

Terminal Access

20312-58

The terminal screen does not clear after selection of a command or parameter.

It scrolls the selected option information onto the bottom of the screen. For

display purposes, the screen in the following paragraphs shows only the infor-

mation for the selection and not the information that will appear above that on

your screen.

2-12 154001UA

2. Operation of the 3028 Turbo Multiplexer

The BACKSPACE or DELETE keys can be used to erase an incorrect entry

before pressing RETURN.

The following paragraphs describe access of the commands and parameters

(Table 2-4) from both the front panel and an attached terminal.

Note

When a parameter is selected to change a particular channel, you receive the following display prior to access of the options.

SELECT CHANNEL NUMBER (1-8) <CR>:

2031N-1

The commands that require channel selection are indicated in Table 2-4 by a double asterisk (**) following the command name. Factory set defaults are listed first in the options/notes column.

Table 2-4. Commands, Parameters and Options (1 of 2)Table 2-4. Commands, Parameters and Options (1 of 2)

Table 2-4. Commands, Parameters and Options (1 of 2)

Table 2-4. Commands, Parameters and Options (1 of 2)Table 2-4. Commands, Parameters and Options (1 of 2)

COMMAND PARAMETER OPTIONS/NOTES

CHNL PARAMETERS**

SPEED 9600, 19,200, DOWNL,

AUTOB, 50, 75, 110, 134, 150, 300, 600, 1200, 1800, 2000,

2400, 3600, 4800, 7200 TYPE ASYNC, HPENQ, SDLC/HDLC DATA BITS 8, 7, 6, 5 STOP BITS 1, 1.5, 2 PARITY NONE/SPACE, NONE/ODD,

NONE/EVEN, ODD, EVEN,

NONE/MARK FL CTL DC3/DC1, DC2/DC1, DC4/DC2,

USER, WANG®, TANDEM®,

CTS-/CTS+, DSR-/DSR+,

NONE FL CTL TR NO, YES RV FL CTL NONE, DC3/DC1, DC2/DC1,

DC4/DC2, USER, WANG®,

RTS-/RTS+, DTR-/DTR+ EIA PROP NO, YES BRK PROP NO, YES ECHOPLEX NO, YES FLYBACK NO, YES CTS-RTS NO, YES MSGS ENAB NO, YES SPVR ENAB NO, YES INAC DISC NO, YES DISC CHAR CTL-T, NONE, USER

154001UA 2-13

3028 Turbo Statistical Multiplexer

Table 2-4. Commands, Parameters and Options (2 of 2)Table 2-4. Commands, Parameters and Options (2 of 2)

Table 2-4. Commands, Parameters and Options (2 of 2)

Table 2-4. Commands, Parameters and Options (2 of 2)Table 2-4. Commands, Parameters and Options (2 of 2)

COMMAND PARAMETER OPTIONS/NOTES

LINK LINK CLK SOURCE EXTERN, INTERN PARAMETERS LINK CLK RATE 9600, 7200, 4800, 3600, 2400,

COPY PARAMETERS**

CHANNEL STATISTICS

LINK STATISTICS FR RECD nnn CURR

CHANNEL STATUS**

LOCAL CHANNEL LOOPBACK**

REMOTE CHANNEL LOOPBACK**

LINK LOOPBACK CHANNEL

RESET** LINK RESET CHANNEL

VALIDATE** STATISTICS

RESET REMOTE SIGNON not available in remote

REMOTE SIGNOFF SET TIME 00:00:00 set time according to a 24-hour

COPY FROM COPY TO

BF UTIL nn% CURR BF UTIL nn% PEAK EXC nnnn FC nnnn RV FC nnnn

FR RECD nnn PEAK FR NAKD nnn CURR FR NAKD nnn PEAK FR RSNT nnn CURR FR RSNT nnn PEAK TX UTIL nn% CURR TX UTIL nn% PEAK RX UTIL nn% CURR RX UTIL nn% PEAK

DRS xxx BO xxx DTR xxx RTS xxx CTS xxx RI xxx DCD xxx DSR xxx LLB xxx RLB xxx FC xxx RFC xxx ACTIVITY zzz

1200, 19,200. select channel (1-8).

select channel (1-8 or ALL). nn is the percentage of

utilization, nnnn is the number of occurences.

nn is the percentage of utilization, nnn is the number of occurences.

xxx is ON or OFF, zzz is YES or NO.

select channel (1-8).

select channel (1-8), not available in remote supervisor mode.

select channel (1-8 or ALL).

select channel (1-8 or supervisor).

supervisor mode.

clock.

2-14 154001UA

2. Operation of the 3028 Turbo Multiplexer

Channel ParametersChannel Parameters

Channel Parameters

Channel ParametersChannel Parameters

The CHANNEL PARAMETERS command is used to change or examine any of

17 programmable parameters on any of the available channel ports or the

supervisory port.

Front Panel Access

From the COMMAND MODE / CHANNEL PARAMETER display:

PRESS: SELECT

The LCD Displays:

SELECT CHANNEL: *1 2 3 4 5 6 7 8

20312-58

PRESS: NEXT or LAST

to select a channel

PRESS: SELECT

The asterisk (*) before the channel number indicates the channel which is

accessed.

The LCD will now display:

CHNL PARAMETERS

Where is CHNL n SPEED

CHNL n TYPE

CHNL n DATA BITS

CHNL n STOP BITS

CHNL n PARITY

CHNL n FL CTL

CHNL n RV FL CTL

CHNL n FL CTL TR

CHNL n EIA PROP

20312-61

CHNL n BRK PROP

CHNL n ECHOPLEX

CHNL n FLYBACK

CHNL n CTS-RTS

CHNL n MSGS ENAB

CHNL n SPVR ENAB

CHNL n INAC DISC

CHNL n DISC CHAR

154001UA 2-15

3028 Turbo Statistical Multiplexer

Terminal Access

To select the CHANNEL PARAMETERS screen:

TYPE: 1

PRESS: RETURN

A channel must be selected following the display:

SELECT CHANNEL NUMBER (1-8) <CR>

After a channel is selected the terminal displays:

20312-6

SPEED: 9600

TYPE: ASYNC

DATA BITS: 8

STOP BITS: 1

PARITY: NONE/SPACE

(ENTER 1-17 <C R> TO SELECT A PARAMETER, OR <CR> TO QUIT.):

FLOW CTL

(XOFF/XON):

DC3/DC1

REV FL CTL:

NONE

FL CTL TR: NO

EIA PROP: NO

10.

BREAK: NO

11.

ECHO: NO

12.

FLYBK: NO

13.

CTS-RTS: NO

14.

MSGS ENAB: NO

15.

SUPERV ENAB: NO

16.

INACT DISC: NO

17.

DISC CHAR: CTL-T

The SPEED parameter sets the data rate for the Channel port. There are 16

speeds to choose from, or the channel may be set to detect the speed of the

incoming characters and adjust itself appropriately using AUTOBAUD options.

The AUTOBAUD option will not trigger on the following speeds: 19.2K, 134.5,

110, 75 and 50. The remote end channel, when set to DOWNL, receives the

setting and is also adjusted to the detected speed. The AUTOBAUD option is

used when data transmission rates vary or are unknown such as with asynchro-

nous modem tail circuits. To use the AUTOBAUD option, turn the attached

terminal on, then enter a CARRIAGE RETURN. Cycling the power is neces-

sary since an off-to-on transition on DTR is required to trigger the multiplexer

to look for the AUTOBAUD character. (Note that this will be DSR OFF-to-ON if

a standard crossover cable is used on a modem tail circuit.)

20312-7

Channel SpeedChannel Speed

Channel Speed

Channel SpeedChannel Speed

If the speed is detected, the following display appears on an attached terminal

(if available):

AUTOBAUD SPEED DETECTED: nnnn

20312-8

2-16 154001UA

2. Operation of the 3028 Turbo Multiplexer

If the message is received but is garbled, either the speed was incorrectly

determined or the parity is in error. To use the built in auto-parity function to

set the parity, enter the following immediately after the AUTOBAUD SPEED

DETECTED message.

TYPE: P (capital)

PRESS: RETURN

The multiplexer will set the parity based on the P and RETURN characters

received.

Note

All channels can be set to the 19,200 speed option as long as the maximum aggregate input does not exceed 76,800bps. Exceeding the 76,800bps input may cause data loss. Enabling certain channel parameters can affect the aggregate input limit. Enabling the following channel parameters will reduce the maximum aggregate input rate supported on the multiplexer: In-Band Reverse Flow Control, Echoplex, Supervisor Enabled, and Flyback Buffering. This is caused by the requirement to examine every character of data generated by the terminal to the multiplexer.

Front Panel Access

From the COMMAND mode display:

PRESS: NEXT or LAST

until CHNL PARAMETERS displays on the second line

PRESS: SELECT

PRESS: NEXT or LAST

to choose a channel number

PRESS: SELECT

PRESS: NEXT or LAST

until CHNL n SPEED displays on the second line

PRESS: SELECT

154001UA 2-17

3028 Turbo Statistical Multiplexer

the LCD displays:

CHNL n SPEED

20312-62

Where is 9600

19200

DOWNL

AUTOB

PRESS: NEXT or LAST

until the desired option displays

PRESS: SELECT

The multiplexer updates the channel speed and returns the CHNL PARAM-

ETERS/CHNL TYPE display.

Update the channel type,

110

134

150

300

600

1200

1800

2000

2400

3600

4800

7200

PRESS: MON/CLR

to exit, or

PRESS: NEXT or LAST

to go to another parameter

Terminal Access

From the Main Menu:

TYPE: 1

PRESS: RETURN

TYPE: n (n= channel number)

PRESS: RETURN

TYPE: 1

from the CHANNEL PARAMETERS menu

PRESS: RETURN

The terminal displays:

CHANNEL n SPEED: C URRENTLY: 9600

19200

9600

7200

(ENTER 1-18 <CR> TO CHANGE. <CR> TO RETAIN OL D SETTING.):

4800

3600

2400

2000

1800

1200

10:

11:

12:

600

300

134.5

13:

14:

15:

150

110

16:

17:

18:

DOWNL

AUTOB

20312-9

2-18 154001UA

2. Operation of the 3028 Turbo Multiplexer

TYPE: n (n = the speed option number)

PRESS: RETURN

The multiplexer updates the channel speed and returns the CHANNEL PA-

RAMETERS menu. If the RETURN key is pressed without entering a speed

option, the Main Menu is returned.

Channel TypeChannel Type

Channel Type

Channel TypeChannel Type

The TYPE parameter allows you to select a standard asynchronous data stream

or a channel with special protocol handling. The HPENQ option selects a set of

functions to improve throughput for terminals and CPUs observing the

Hewlett-Packard ENQ/ACK® block mode protocol. Appendix E provides

information on the Hewlett-Packard ENQ/ACK

option is described in Appendix I.

Front Panel Access

From the COMMAND MODE display:

PRESS: NEXT or LAST

until CHNL PARAMETERS displays on the second line

PRESS: SELECT

PRESS: NEXT or LAST

to choose a channel number

PRESS: SELECT

PRESS: NEXT or LAST

until CHNL n TYPE displays on the second line

PRESS: SELECT

the LCD displays:

protocol. The SDLC/HDLC

CHNL n TYPE

20312-63

Where is ASYNC

HPENQ

SDLC/HDLC

PRESS: NEXT or LAST

until the desired option displays

PRESS: SELECT

The multiplexer updates the channel type and returns the CHNL PARAM-

ETERS/CHNL DATA BITS display.

Update the channel data bits,

PRESS: MON/CLR

to exit, or

PRESS: NEXT or LAST

to go to another parameter

154001UA 2-19

3028 Turbo Statistical Multiplexer

Terminal Access

To access the TYPE parameter from the Main Menu:

TYPE: 1

PRESS: RETURN

TYPE: n (n = channel number)

PRESS: RETURN

TYPE: 2

from the CHANNEL PARAMETERS menu

PRESS: RETURN

The terminal displays:

CHANNEL n TYPE: CURRENTLY: ASYNC

1: 2:ASYNC HPENQ 3: SDLC/HDLC

(ENTER 1-3 <C R> TO CHANGE. <CR> TO RETAIN OLD SETTING.):

TYPE: n (n = the channel type option number)

PRESS: RETURN

The multiplexer updates the channel type and returns the CHANNEL PARAM-

ETERS menu. If the RETURN key is pressed without entering a type option,

the Main Menu is returned.

The DATA BITS parameter establishes the number of data bits (excluding any

parity) between the start and stop bits of the character.

Front Panel Access

From the COMMAND MODE display

PRESS: NEXT or LAST

until CHNL PARAMETERS displays on the second line

PRESS: SELECT

PRESS: NEXT or LAST

to choose a channel number

20312-10

Channel Data BitsChannel Data Bits

Channel Data Bits

Channel Data BitsChannel Data Bits

PRESS: SELECT

PRESS: NEXT or LAST

until CHNL n DATA BITS displays on the second line

PRESS: SELECT

2-20 154001UA

2. Operation of the 3028 Turbo Multiplexer

312-1

the LCD displays:

CHNL n DATA BITS

20312-64

Where is 8

PRESS: NEXT or LAST

until the desired option displays

PRESS: SELECT

The multiplexer updates the channel data bits and returns the CHNL PARAM-

ETERS/CHNL STOP BITS display.

Update the channel stop bits,

PRESS: MON/CLR

to exit, or

PRESS: NEXT or LAST

to go to another parameter

Terminal Access

To access the DATA BITS parameter from the Main Menu:

TYPE: 1

PRESS: RETURN

TYPE: n (n = channel number)

PRESS: RETURN

TYPE: 3

from the CHANNEL PARAMETERS menu

PRESS: RETURN

The terminal displays:

CHANNEL n DATA BITS: CURRENTLY: 8

1: 2:8 7 3: 4:65

(ENTER 1-4 <CR> TO CHANGE. <CR> TO RETAIN OL D SETTING.):

TYPE: n (n = the data bit option number)

PRESS: RETURN

The multiplexer updates the channel data bits and returns the CHANNEL

PARAMETERS menu. If the RETURN key is pressed without entering a data

bits option, the Main Menu is returned.

154001UA 2-21

3028 Turbo Statistical Multiplexer

The STOP BITS parameter establishes the number of stop bits generated for an

outgoing asynchronous character. For incoming characters to the 3028 Turbo (CTS

2031 Turbo) this parameter is not critical since only one stop bit is looked for. Some

terminals, however, will not operate correctly unless two stop bits are appended to

each character sent toward them. Stop bits are not transmitted across the compos-

ite link.

Front Panel Access

From the COMMAND MODE display

PRESS: NEXT or LAST

until CHNL PARAMETERS displays on the second line

PRESS: SELECT

PRESS: NEXT or LAST

to choose a channel number

PRESS: SELECT

PRESS: NEXT or LAST

until CHNL n STOP BITS displays on the second line

PRESS: SELECT

the LCD displays:

Channel Stop BitsChannel Stop Bits

Channel Stop Bits

Channel Stop BitsChannel Stop Bits

CHNL n STOP BITS

20312-65

Where is 1

1.5

PRESS: NEXT or LAST

until the desired option displays

PRESS: SELECT

The multiplexer updates the channel stop bits and returns the CHNL PARAM-

ETERS/CHNL PARITY BITS display.

Update the channel parity bits,

PRESS: MON/CLR

to exit, or

PRESS: NEXT or LAST

to go to another parameter

2-22 154001UA

Terminal Access

312-1

To access the STOP BITS parameter from the Main Menu:

TYPE: 1

PRESS: RETURN

TYPE: n (n = channel number)

PRESS: RETURN

TYPE: 4

from the CHANNEL PARAMETERS menu

PRESS: RETURN

The terminal displays:

CHANNEL n STOP BITS: CURRENTLY: 1

1: 2:1 1.5 3: 2

2. Operation of the 3028 Turbo Multiplexer

Channel ParityChannel Parity

Channel Parity

Channel ParityChannel Parity

(ENTER 1-3 <CR> TO CHANGE. <CR> TO RETAIN OL D SETTING.):

TYPE: n (n = the stop bit option number)

PRESS: RETURN

The multiplexer updates the channel stop bits and returns the CHANNEL PARAM-

ETERS menu. If the RETURN key is pressed without entering a stop bit option, the

Main Menu is returned.

The PARITY parameter controls whether or not a parity bit , in addition to the data

bits, is checked on incoming characters and appended on outgoing characters.

If you do not want the multiplexer to be sensitive to parity, the NONE/ODD,

NONE/EVEN, NONE/MARK or NONE/SPACE option should be chosen. The

NONE portion of the selection disables parity checking/insertion. The ODD,

EVEN, MARK or SPACE portion of the selections refers to the parity setting of the

3028 Turbo (CTS 2031 Turbo) generated messages such as Menus, LINK DOWN or

DATA LOSS. The MESSAGES ENABLED parameter must be set to YES before

messages are sent to the attached device.

When the ODD or EVEN option is selected and a parity error is detected, parity is

stripped and the character is sent as received to the remote end. A parity error

count is maintained in the channel statistics under CHANNEL EXCEPTIONS.

Appendix D provides more information on parity.

Front Panel Access

154001UA 2-23

3028 Turbo Statistical Multiplexer

From the COMMAND MODE display

PRESS: NEXT or LAST

until CHNL PARAMETERS displays on the second line

PRESS: SELECT

PRESS: NEXT or LAST

to choose a channel number

PRESS: SELECT

PRESS: NEXT or LAST

until CHNL n PARITY displays on the second line

PRESS: SELECT

the LCD displays:

CHNL n PARITY

20312-66

Where is NONE/ODD

NONE/EVEN

ODD

EVEN

NONE/MARK

NONE/SPACE

PRESS: NEXT or LAST

until the desired option displays

PRESS: SELECT

The multiplexer updates the channel parity and returns the CHNL PARAMETERS/

CHNL FL CTL display.

Update the channel flow control,

PRESS: MON/CLR

to exit, or

PRESS: NEXT or LAST

to go to another parameter

Terminal Access

To access the PARITY parameter from the Main Menu:

TYPE: 1

PRESS: RETURN

TYPE: n (n = channel number)

PRESS: RETURN

2-24 154001UA

TYPE: 5

312-1

from the CHANNEL PARAMETERS menu

PRESS: RETURN

The terminal displays:

TYPE: n (n = the parity option number)

CHANNEL n PARITY: CURRENTLY: NONE/ODD

2. Operation of the 3028 Turbo Multiplexer

(ENTER 1-6 <CR> TO CHANGE. <CR> TO RETAIN OL D SETTING.):

Channel Flow ControlChannel Flow Control

Channel Flow Control

Channel Flow ControlChannel Flow Control

NONE/ODD

NONE/SPACE

The multiplexer updates the channel parity and returns the CHANNEL PARAM-

ETERS menu. If the RETURN key is pressed without entering a parity option, the

Main Menu is returned.

The FLOW CONTROL parameter, also known as buffer overflow protection, is

a means of preventing data loss in high-traffic periods. Some terminals respond

to ASCII control characters (most commonly Device Control 1 and Device

Control 3 [DC1/DC3]) as signals to suspend and resume transmission. Others

respond to changes in the RS-232-C leads (most commonly CTS). Options

supported provide these and other possibilities, including any user-specified

character as either the XOFF (turning the data transmission off) or the XON

(turning the data transmission on) signal.

The USER option allows entry of arbitrary XON and XOFF characters. After

selection of the USER option, the current setting is displayed. Enter the revised

setting in decimal (0-255), allowing any of the 128 ASCII characters with either

parity setting. Entry of 255 and 0 are interpreted the same by the multiplexer.

NONE/EVEN

ODD

PRESS: RETURN

5:6:NONE/MARK

EVEN

Appendix F provides information on the TANDEM T-Pause® and Wang® flow

control methods.

Appendix J provides information on the EIA Signal Exceptions.

Note

Forcing an EIA signal high or low using the CHANNEL STATUS command prevents using that signal as a flow control option.

154001UA 2-25

3028 Turbo Statistical Multiplexer

Front Panel Access

From the COMMAND MODE display

PRESS: NEXT or LAST

until CHNL PARAMETERS displays on the second line

PRESS: SELECT

PRESS: NEXT or LAST

to choose a channel number

PRESS: SELECT

PRESS: NEXT or LAST

until CHNL n FL CTL displays on the second line

PRESS: SELECT

the LCD displays:

CHNL n FL CTL

20312-67

Where is NONE

DC3/DC1

DC2/DC1

DC4/DC2

WANG

TANDEM

CTS-/CTS+

DSR-/DSR+

USER

PRESS: NEXT or LAST

until the desired option displays

PRESS: SELECT

The multiplexer updates the channel flow control and returns the CHNL

PARAMETERS/CHNL RV FL CTL display.

Update the channel Reverse Flow Control,

PRESS: MON/CLR

to exit, or

PRESS: NEXT or LAST

to go to another parameter

Terminal Access

To access the FLOW CONTROL parameter from the Main Menu:

TYPE: 1

PRESS: RETURN

TYPE: n (n = channel number)

PRESS: RETURN

TYPE: 6

2-26 154001UA

2. Operation of the 3028 Turbo Multiplexer

312-1

from the CHANNEL PARAMETERS menu

PRESS: RETURN

The terminal displays:

CHANNEL n FLOW CTL: CURRENTLY: DC3/DC1 (XOFF/XON)

(ENTER 1-9 <CR> TO CHANGE. <CR> TO RETAIN OLD SETTING.):

Channel Reverse FlowChannel Reverse Flow

Channel Reverse Flow

Channel Reverse FlowChannel Reverse Flow ControlControl

Control

ControlControl

NONE

DC3/DC1

DC2/DC1

DC4/DC2

USER

WANG

TANDEM

CTS-/CTS+

DSR-/DSR+

TYPE: n (n = the flow control option number)

PRESS: RETURN

The multiplexer updates the channel flow control and returns the CHANNEL

PARAMETERS menu. If the RETURN key is pressed without entering a flow

control option, the Main Menu is returned.

The REVERSE FLOW CONTROL parameter, also known as terminal flow

control, establishes signals to suspend and resume output to attached peripher-

als. Reverse flow control is similar to flow control, except that it goes in the

other direction, i.e. from the terminal or host to the multiplexer.

When a terminal raises a reverse flow control signal, the remote end is notified

via an internal control message so that flow control can be invoked there to

prevent excessive buildup of data within the multiplexer. The USER option can

be used to set arbitrary reverse flow control XON/XOFF characters.

Front Panel Access

From the COMMAND MODE display

PRESS: NEXT or LAST

until CHNL PARAMETERS displays on the second line

PRESS: SELECT

PRESS: NEXT or LAST

to choose a channel number

PRESS: SELECT

PRESS: NEXT or LAST

until CHNL n RV FL CTL displays on the second line

PRESS: SELECT

154001UA 2-27

3028 Turbo Statistical Multiplexer

the LCD displays:

CHNL n RV FL CTL

20312-68

Where is NONE

DC3/DC1

DC2/DC1

DC4/DC2

PRESS: NEXT or LAST

until the desired option displays

PRESS: SELECT

The multiplexer updates the channel Reverse Flow Control and returns the

CHNL PARAMETERS/CHNL FL CTL TR display.

Update the channel Flow Control Translation,

USER

WANG

CTS-/CTS+

DSR-/DSR+

PRESS: MON/CLR

to exit, or

PRESS: NEXT or LAST

to go to another parameter

Terminal Access

To access the REVERSE FLOW CONTROL parameter from the Main Menu:

TYPE: 1

PRESS: RETURN

TYPE: n (n = channel number)

PRESS: RETURN

TYPE: 7

from the CHANNEL PARAMETERS menu

PRESS: RETURN

The terminal displays:

CHANNEL n REV FL CTL: CURRENTLY: NONE (XOFF/XON)

NONE

DC3/DC1

DC2/DC1

(ENTER 1-8 <CR> TO CHANGE. <CR> TO RETAIN OLD SETTING.):

DC4/DC2

USER

WANG

7:8:RTS-/RTS+

DTR-/DTR+

20312-15

2-28 154001UA

2. Operation of the 3028 Turbo Multiplexer

TYPE: n (n = the reverse flow control option number)

PRESS: RETURN

The multiplexer updates the channel reverse flow control and returns the

CHANNEL PARAMETERS menu. If the RETURN key is pressed without

entering a reverse flow control option, the Main Menu is returned.

Channel Flow ControlChannel Flow Control

Channel Flow Control

Channel Flow ControlChannel Flow Control TranslationTranslation

Translation

TranslationTranslation

The FLOW CONTROL TRANSLATION parameter allows terminals with out-

of-band reverse flow control logic (e.g. DTR-/DTR+) to connect to hosts that

operate with in-band flow control, and vice versa.

Appendix G provides a table of what occurs when flow control translation is

enabled.

Front Panel Access

From the COMMAND MODE display

PRESS: NEXT or LAST

until CHNL PARAMETERS displays on the second line

PRESS: SELECT

PRESS: NEXT or LAST

to choose a channel number

PRESS: SELECT

PRESS: NEXT or LAST

until CHNL n FL CTL TR displays on the second line

PRESS: SELECT

the LCD displays:

CHNL n FL CTL TR

20312-69

Where is NO

YES

PRESS: NEXT or LAST

until the desired option displays

PRESS: SELECT

The multiplexer updates the channel flow control translation and returns the

CHNL PARAMETERS/CHNL EIA PROP display.

Update the channel EIA Propagation,

PRESS: MON/CLR

to exit, or

PRESS: NEXT or LAST

to go to another parameter

154001UA 2-29

3028 Turbo Statistical Multiplexer

Terminal Access

To access the FLOW CONTROL TRANSLATION parameter from the Main

Menu:

TYPE: 1

PRESS: RETURN

TYPE: n (n = channel number)

PRESS: RETURN

TYPE: 8

from the CHANNEL PARAMETERS menu

PRESS: RETURN

The terminal displays:

CHANNEL n FLOW CONTROL TRANSLATION: CURRENTLY: NO

1: 2:YES NO

(ENTER 1-2 <CR> TO CHANGE. <CR> TO RETAIN OL D SETTING.):

TYPE: n (n = the flow control translation option number)

PRESS: RETURN

The multiplexer updates the channel flow control translation and returns the

CHANNEL PARAMETERS menu. If the RETURN key is pressed without

entering a flow translation control option, the Main Menu is returned.

The EIA PROPAGATION parameter controls whether or not the RS-232-C

control lead inputs are propagated end-to-end. If disabled, transitions on the

RS-232-C control signals are not propagated to the remote end.

Appendix J provides information on the EIA Signal Exceptions.

Front Panel Access

From the COMMAND MODE display

PRESS: NEXT or LAST

until CHNL PARAMETERS displays on the second line

20312-16

Channel EIA PropagationChannel EIA Propagation

Channel EIA Propagation

Channel EIA PropagationChannel EIA Propagation

PRESS: SELECT

PRESS: NEXT or LAST

to choose a channel number

PRESS: SELECT

PRESS: NEXT or LAST

until CHNL n EIA PROP displays on the second line

2-30 154001UA

2. Operation of the 3028 Turbo Multiplexer

312-1

PRESS: SELECT

the LCD displays:

CHNL n EIA PROP

20312-70

Where is NO

YES

PRESS: NEXT or LAST

until the desired option displays

PRESS: SELECT

The multiplexer updates the channel EIA Propagation and returns the CHNL

PARAMETERS/CHNL BRK PROP display.

Update the channel Break Propagation,

PRESS: MON/CLR

to exit, or

PRESS: NEXT or LAST

to go to another parameter

Terminal Access

To access the EIA PROPAGATION parameter from the Main Menu:

TYPE: 1

PRESS: RETURN

TYPE: n (n = channel number)

PRESS: RETURN

TYPE: 9

from the CHANNEL PARAMETERS menu

PRESS: RETURN

The terminal displays:

CHANNEL n EIA PROP: CURRENTLY: NO

1: 2:YES NO

(ENTER 1-2 <CR> TO CHANGE. <CR> TO RETAIN OL D SETTING.):

TYPE: n (n = the EIA propagation option number)

PRESS: RETURN

The multiplexer updates the EIA propagation and returns the CHANNEL

PARAMETERS menu. If the RETURN key is pressed without entering an EIA

propagation option, the Main Menu is returned.

154001UA 2-31

3028 Turbo Statistical Multiplexer

The BREAK PROPAGATION parameter controls whether or not break signals

are detected and regenerated. A break signal is defined as the space condition

of a line for more than one character time. Once the break condition is detected,

a break-on control message is sent to the remote end causing the break signal to

be regenerated until a break-off control message is received or 2.016 seconds

elapse. Both ends, local and remote, must be programmed the same for proper

operation of this parameter.

Front Panel Access

From the COMMAND MODE display

PRESS: NEXT or LAST

until CHNL PARAMETERS displays on the second line

PRESS: SELECT

PRESS: NEXT or LAST

to choose a channel number

PRESS: SELECT

PRESS: NEXT or LAST

until CHNL n BRK PROP displays on the second line

PRESS: SELECT

the LCD displays:

Channel BreakChannel Break

Channel Break

Channel BreakChannel Break

PropagationPropagation

Propagation

PropagationPropagation

CHNL n BRK PROP

20312-72

Where is NO

YES

PRESS: NEXT or LAST

until the desired option displays

PRESS: SELECT

The multiplexer updates the channel Break Propagation and returns the CHNL

PARAMETERS/CHNL ECHOPLEX display.

Update the channel echoplex,

PRESS: MON/CLR

to exit, or

PRESS: NEXT or LAST

to go to another parameter

2-32 154001UA

2. Operation of the 3028 Turbo Multiplexer

312-1

Terminal Access

To access the BREAK PROPAGATION parameter from the Main Menu:

TYPE: 1

PRESS: RETURN

TYPE: n (n = channel number)

PRESS: RETURN

TYPE: 10

from the CHANNEL PARAMETERS menu

PRESS: RETURN

The terminal displays:

CHANNEL n BREAK: CURRENTLY: NO

1: 2:YES NO

(ENTER 1-2 <CR> TO CHANGE. <CR> TO RETAIN OLD SETTING.):

Channel EchoplexChannel Echoplex

Channel Echoplex

Channel EchoplexChannel Echoplex

TYPE: n (n = the break propagation option number)

PRESS: RETURN

The multiplexer updates the break propagation and returns the CHANNEL

PARAMETERS menu. If the RETURN key is pressed without entering a break

propagation option, the Main Menu is returned.

The ECHOPLEX parameter selects whether or not the multiplexer should echo

back to the attached peripherals all printable characters received. If selected, all

input except control characters are echoed back to the terminal. The purpose of

this parameter is to shorten the response time for half-duplex terminals. All

characters are Echoplexed except a flow control XOFF.

Note

If echoing is enabled at the multiplexer, it must be disabled within the host or double characters will appear.

Front Panel Access

From the COMMAND MODE display

PRESS: NEXT or LAST

until CHNL PARAMETERS displays on the second line

154001UA 2-33

3028 Turbo Statistical Multiplexer

PRESS: SELECT

PRESS: NEXT or LAST

to choose a channel number

PRESS: SELECT

PRESS: NEXT or LAST

until CHNL n ECHOPLEX displays on the second line

PRESS: SELECT

the LCD displays:

CHNL n ECHOPLEX

20312-71

Where is NO

YES

PRESS: NEXT or LAST

until the desired option displays

PRESS: SELECT

The multiplexer updates the channel Echoplex and returns the CHNL PARAM-

ETERS/CHNL FLYBACK display.

Update the channel Flyback,

PRESS: MON/CLR

to exit, or

PRESS: NEXT or LAST

to go to another parameter

Terminal Access

To access the ECHOPLEX parameter from the Main Menu:

TYPE: 1

PRESS: RETURN

TYPE: n (n = channel number)

PRESS: RETURN

TYPE: 11

from the CHANNEL PARAMETERS menu

PRESS: RETURN

2-34 154001UA

2. Operation of the 3028 Turbo Multiplexer

312-1

The terminal displays:

CHANNEL n ECHOPLEX: CURRENTLY: NO

1: 2:YES NO

(ENTER 1-2 <CR> TO CHANGE. <CR> TO RETAIN OL D SETTING.):

TYPE: n (n = the echoplex option number)

PRESS: RETURN

The multiplexer updates the channel echoplex and returns the CHANNEL

PARAMETERS menu. If the RETURN key is pressed without entering an

echoplex option, the Main Menu is returned.

Channel Flyback BufferingChannel Flyback Buffering

Channel Flyback Buffering

Channel Flyback BufferingChannel Flyback Buffering

The FLYBACK BUFFERING parameter causes detection and regeneration at

the remote end of any delay encountered after reception of characters which

cause print-heads to "flyback" to the beginning of a line. If selected, the delay is

regenerated after the ASCII characters: Carriage Return, Line Feed, Form Feed,

Horizontal Tab, and Vertical Tab.

Front Panel Access

From the COMMAND MODE display

PRESS: NEXT or LAST

until CHNL PARAMETERS displays on the second line

PRESS: SELECT

PRESS: NEXT or LAST

to choose a channel number

PRESS: SELECT

PRESS: NEXT or LAST

until CHNL n FLYBACK displays on the second line

PRESS: SELECT

the LCD displays:

CHNL n FLYBACK

20312-73

Where is NO

YES

PRESS: NEXT or LAST

until the desired option displays

PRESS: SELECT

154001UA 2-35

3028 Turbo Statistical Multiplexer

The multiplexer updates the channel Flyback and returns the CHNL PARAM-

ETERS/CHNL CTS-RTS display.

Update the channel CTS-RTS,

PRESS: MON/CLR

to exit, or

PRESS: NEXT or LAST

to go to another parameter

Terminal Access

To access the FLYBACK BUFFERING parameter from the Main Menu:

TYPE: 1

PRESS: RETURN

TYPE: n (n = channel number)

PRESS: RETURN

TYPE: 12

from the CHANNEL PARAMETERS menu

PRESS: RETURN

The terminal displays:

CHANNEL n FLYBACK BUFFERING: CURRENTLY: NO

1: 2:YES NO

(ENTER 1-2 <CR> TO CHANGE. <CR> TO RETAIN OL D SETTING.):

TYPE: n (n = the flyback buffering option number)

PRESS: RETURN

The multiplexer updates the channel flyback buffering and returns the CHAN-

NEL PARAMETERS menu. If the RETURN key is pressed without entering a

flyback buffering option, the Main Menu is returned.

The CTS-RTS CONTROL parameter allows selection of whether or not the

CTS output is programmed to track the state of the local RTS input. This is

important when used in extremely delay-sensitive applications. This tying of

local CTS output to the local RTS input disables the end-to-end propagation of

DRSS (Data Rate Secondary Select) as CTS. The state of the CTS lead may be

overridden by the manual setting of control leads.

20312-20

Channel CTS-RTS ControlChannel CTS-RTS Control

Channel CTS-RTS Control

Channel CTS-RTS ControlChannel CTS-RTS Control

Appendix J provides information in the EIA Signals Exceptions.

2-36 154001UA

2. Operation of the 3028 Turbo Multiplexer

Front Panel Access

From the COMMAND MODE display

PRESS: NEXT or LAST

until CHNL PARAMETERS displays on the second line

PRESS: SELECT

PRESS: NEXT or LAST

to choose a channel number

PRESS: SELECT

PRESS: NEXT or LAST

until CHNL n CTS-RTS displays on the second line

PRESS: SELECT

the LCD displays:

CHNL n CTS-RTS

20312-74

Where is NO

YES

PRESS: NEXT or LAST

until the desired option displays

PRESS: SELECT

The multiplexer updates the channel CTS-RTS and returns the CHNL PARAM-

ETERS/CHNL MSGS ENAB display.

Update the channel Message Enabled,

PRESS: MON/CLR

to exit, or

PRESS: NEXT or LAST

to go to another parameter

Terminal Access

To access the CTS-RTS CONTROL parameter from the Main Menu:

TYPE: 1

PRESS: RETURN

TYPE: n (n = channel number)

PRESS: RETURN

TYPE: 13

from the CHANNEL PARAMETERS menu

PRESS: RETURN

154001UA 2-37

3028 Turbo Statistical Multiplexer

The terminal displays:

CHANNEL n CTS-RTS CONTROL: CURRENTLY: NO

1: 2:YES NO

(ENTER 1-2 <CR> TO CHANGE. <CR> TO RETAIN OL D SETTING.):

TYPE: n (n = the CTS-RTS option number)

PRESS: RETURN

The multiplexer updates the channel CTS-RTS and returns the CHANNEL

PARAMETERS menu. If the RETURN key is pressed without entering an CTS-

RTS option, the Main Menu is returned.

20312-21

The MESSAGES ENABLED parameter allows or disallows message output to

connected equipment from the multiplexer, such as DATA LOST, LINK

DOWN, or AUTOBAUD SPEED DETECTED. Such messages are usually

disabled on the channel port at the host or at a non-ASCII terminal.

Front Panel Access

From the COMMAND MODE display

PRESS: NEXT or LAST

until CHNL PARAMETERS displays on the second line

PRESS: SELECT

PRESS: NEXT or LAST

to choose a channel number

PRESS: SELECT

PRESS: NEXT or LAST

until CHNL n MSGS ENAB displays on the second line

PRESS: SELECT

the LCD displays:

Channel MessagesChannel Messages

Channel Messages

Channel MessagesChannel Messages

EnabledEnabled

Enabled

EnabledEnabled

CHNL n MSGS ENAB

20312-75

Where is NO

YES

PRESS: NEXT or LAST

until the desired option displays

PRESS: SELECT

2-38 154001UA

2. Operation of the 3028 Turbo Multiplexer

312-2

The multiplexer updates the channel messages enabled and returns the CHNL

PARAMETERS/CHNL SPVR ENAB display.

Update the channel Supervisor Enabled,

PRESS: MON/CLR

to exit, or

PRESS: NEXT or LAST

to go to another parameter

Terminal Access

To access the MESSAGES ENABLED parameter from the Main Menu:

TYPE: 1

PRESS: RETURN

TYPE: n (n = channel number)

PRESS: RETURN

TYPE: 14

from the CHANNEL PARAMETERS menu

PRESS: RETURN

The terminal displays:

CHANNEL n MSGS ENABLED: CURRENTLY: NO

1: 2:YES NO

(ENTER 1-2 <CR> TO CHANGE. <CR> TO RETAIN OL D SETTING.):

TYPE: n (n = the messages enabled option number)

PRESS: RETURN

The multiplexer updates the channel messages enabled and returns the CHAN-

NEL PARAMETERS menu. If the RETURN key is pressed without entering a

messages enabled option, the Main Menu is returned.

154001UA 2-39

3028 Turbo Statistical Multiplexer

The SUPERVISOR ENABLED parameter determines whether or not the

connected equipment is allowed access to supervisory functions via entry of the

<supervisor logon character> from an attached terminal keyboard.

Front Panel Access

From the COMMAND MODE display

PRESS: NEXT or LAST

until CHNL PARAMETERS displays on the second line

PRESS: SELECT

PRESS: NEXT or LAST

to choose a channel number

PRESS: SELECT

PRESS: NEXT or LAST

until CHNL n SPVR ENAB displays on the second line

PRESS: SELECT

the LCD displays:

CHNL n SPVR ENAB

Channel SupervisorChannel Supervisor

Channel Supervisor

Channel SupervisorChannel Supervisor

EnabledEnabled

Enabled

EnabledEnabled

20312-76

Where is NO

YES

PRESS: NEXT or LAST

until the desired option displays

PRESS: SELECT

If the YES option is selected, the current supervisor logon character is dis-

played. A new character may be entered, using the number keys, in decimal

from Appendix C.

Note

Each channel can have a different supervisor logon character

The multiplexer updates the channel supervisory enabled selection and returns

the CHNL PARAMETERS/CHNL INAC DISC display.

Update the channel Inactivity Disconnect,

PRESS: MON/CLR

to exit, or

PRESS: NEXT or LAST

to go to another parameter

2-40 154001UA

2. Operation of the 3028 Turbo Multiplexer

312-2

Terminal Access

To access the SUPERVISOR ENABLED parameter from the Main Menu:

TYPE: 1

PRESS: RETURN

TYPE: n (n = channel number)

PRESS: RETURN

TYPE: 15

from the CHANNEL PARAMETERS menu

PRESS: RETURN

The terminal displays:

CHANNEL n SUPERVISORY MODE ENABLED: CURRENTLY: NO

1: 2:YES NO

(ENTER 1-2 <CR> TO CHANGE. <CR> TO RETAIN OL D SETTING.):

TYPE: n (n = the supervisor enabled option number)

PRESS: RETURN

If the YES option is selected, the current supervisor logon character is dis-

played. A new character may be entered, using the number keys, in decimal

from Appendix C. Press the RETURN key to update the multiplexer.

Note

Each channel can have a different supervisor logon character

The multiplexer updates the channel supervisor enabled and returns the

CHANNEL PARAMETERS menu. If the RETURN key is pressed without

entering a supervisor enabled option, the Main Menu is returned.

154001UA 2-41

3028 Turbo Statistical Multiplexer

The INACTIVITY DISCONNECT parameter is only relevant in DCX network

applications. When enabled, the multiplexer sends an internal control code to

the DCX 850 User Switching Option (USO) when the channel has been idle for

more than 20 minutes, freeing the port for other traffic.

Note

This parameter should be set to NO if not in a DCX 850 network.

Front Panel Access

From the COMMAND MODE display

PRESS: NEXT or LAST

until CHNL PARAMETERS displays on the second line

PRESS: SELECT

PRESS: NEXT or LAST

to choose a channel number

PRESS: SELECT

PRESS: NEXT or LAST

until CHNL n INAC DISC displays on the second line

Channel InactivityChannel Inactivity

Channel Inactivity

Channel InactivityChannel Inactivity

DisconnectDisconnect

Disconnect

DisconnectDisconnect

PRESS: SELECT

the LCD displays:

CHNL n INAC DISC

20312-77

Where is NO

YES

PRESS: NEXT or LAST

until the desired option displays

PRESS: SELECT

The multiplexer updates the channel inactivity disconnect and returns the

CHNL PARAMETERS/CHNL DISC CHAR display.

Update the channel Disconnect Character,

PRESS: MON/CLR

to exit, or

PRESS: NEXT or LAST

to go to another parameter

2-42 154001UA

2. Operation of the 3028 Turbo Multiplexer

312-2

Terminal Access

To access the INACTIVITY DISCONNECT parameter from the Main Menu:

TYPE: 1

PRESS: RETURN

TYPE: n (n = channel number)

PRESS: RETURN

TYPE: 16

from the CHANNEL PARAMETERS menu

PRESS: RETURN

The terminal displays:

CHANNEL n INACTIVITY DISCONNECT: CURRENTLY: NO

1: 2:YES NO

Channel DisconnectChannel Disconnect

Channel Disconnect

Channel DisconnectChannel Disconnect CharacterCharacter

Character

CharacterCharacter

(ENTER 1-2 <CR> TO CHANGE. <CR> TO RETAIN OL D SETTING.):

TYPE: n (n = the inactivity disconnect option number)

PRESS: RETURN

The multiplexer updates the channel inactivity disconnect and returns the

CHANNEL PARAMETERS menu. If the RETURN key is pressed without

entering an inactivity disconnect option, the Main Menu is returned.

The DISCONNECT CHARACTER parameter is only relevant in DCX net-

working applications. Upon receipt of the disconnect character, a message is



generated to the DCX

to either make or tear down a DCX 850 User Switching

Option (USO) connection. This character is normally CTRL + T, but you may

specify any other character by selecting the USER option.

Front Panel Access

From the COMMAND MODE display

PRESS: NEXT or LAST

until CHNL PARAMETERS displays on the second line

PRESS: SELECT

PRESS: NEXT or LAST

to choose a channel number

PRESS: SELECT

PRESS: NEXT or LAST

until CHNL n DISC CHAR displays on the second line

PRESS: SELECT

154001UA 2-43

3028 Turbo Statistical Multiplexer

the LCD displays:

CHNL n DISC CHAR

20312-78

Where is USER

CTL-T

NONE

PRESS: NEXT or LAST

until the desired option displays

PRESS: SELECT

If the USER option is selected, the current user value is displayed. A new

character can be entered, using the number keys, in decimal from Appendix C.

Press the RETURN key to update the multiplexer.

Note

Each channel can have a different disconnect character

The multiplexer updates the channel disconnect character and returns the

CHNL PARAMETERS/CHNL SPEED display.

Update the channel Speed,

PRESS: MON/CLR

to exit, or

PRESS: NEXT or LAST

to go to another parameter

Terminal Access

To access the DISCONNECT CHARACTER parameter from the Main Menu:

TYPE: 1

PRESS: RETURN

TYPE: n (n = channel number)

PRESS: RETURN

TYPE: 17

from the CHANNEL PARAMETERS menu

PRESS: RETURN

2-44 154001UA

2. Operation of the 3028 Turbo Multiplexer

312-2

The terminal displays:

CHANNEL n DISCONNECT CHARACTER: CURRENTLY: CTL-T

1: 2:USER CTL-T 3: NONE

(ENTER 1-3 <CR> TO CHANGE. <CR> TO RETAIN OL D SETTING.):

TYPE: n (n = the disconnect character option number)

PRESS: RETURN

If the USER option is selected, the current user value is displayed. A new

character can be entered, using the number keys, in decimal from Appendix C.

Press the RETURN key to update the multiplexer.

Note

Each channel can have a different disconnect character

The multiplexer updates the channel disconnect character and returns the

CHANNEL PARAMETERS menu. If the RETURN key is pressed without

entering a disconnect character option, the Main Menu is returned.

154001UA 2-45

3028 Turbo Statistical Multiplexer

The LINK PARAMETERS command allows you to change the parameters of

the link port. Enter COMMAND mode by pressing the NEXT push button from

either the MONITOR or STANDBY mode.

The CLOCK SOURCE parameter selects whether the multiplexer link serial

interface will accept the clock source from pins 15 and 17 (external clocks) or to

furnish clock on Pin 24 (internal clock). With synchronous modems, the exter-

nal clock is normally used. When external is chosen, the clock rate parameter

has no affect on link transmission. However, the clock rate should still be set, so

that the link statistics are computed correctly.

Front Panel Access

From the COMMAND MODE display:

PRESS: NEXT or LAST

until LINK PARAMETERS displays on the second line

PRESS: SELECT

The LCD displays:

LINK PARAMETERS LINK CLK SOURCE

20312-79

Link ParametersLink Parameters

Link Parameters

Link ParametersLink Parameters

Link Clock SourceLink Clock Source

Link Clock Source

Link Clock SourceLink Clock Source

PRESS: SELECT

The LCD displays:

LINK CLK SOURCE

20312-80

Where is INTERN

EXTERN

PRESS: NEXT or LAST

until the desired option displays

PRESS: SELECT key

The multiplexer updates the link clock source and returns the LINK PARAM-

ETERS/LINK CLK RATE display

Update the link Clock Rate, or

PRESS: MON/CLR

to exit

2-46 154001UA

2. Operation of the 3028 Turbo Multiplexer

312-2

Terminal Access

To access the LINK CLOCK SOURCE parameter from the Main Menu:

TYPE: 2

PRESS: RETURN

The terminal displays:

LINK PARAMETERS:

1. 2.CLOCK SOURCE: INTERNAL CLOCK RATE: 9600

(ENTER 1-2 <CR> TO SELECT PARAMETER, OR <CR> TO QUIT.):

TYPE: 1

from the LINK PARAMETERS menu

Link Clock RateLink Clock Rate

Link Clock Rate

Link Clock RateLink Clock Rate

PRESS: RETURN

LINK CLOCK SOURCE: CURRENTLY: INTERN

1. 2.EXTERNAL INTERNAL

(ENTER 1-3 <CR> TO CHANGE. <CR> TO RETAIN OLD SETTING.):

The terminal displays:

TYPE: n (n = clock source option number)

PRESS: RETURN

The multiplexer updates the link clock source and returns the LINK PARAM-

ETERS menu. If the RETURN key is pressed without entering a clock source

option, the Main Menu is returned.

The CLOCK RATE parameter selects the data rate of the link port. It is used

when the internal clock is selected and for link statistics. The CLOCK RATE

parameter should always be set so that link statistics are computed correctly.

Front Panel Access

From the COMMAND MODE display:

PRESS: NEXT or LAST

until LINK PARAMETERS displays on the second line

PRESS: SELECT

154001UA 2-47

3028 Turbo Statistical Multiplexer

The LCD displays:

LINK PARAMETERS LINK CLK RATE

PRESS: SELECT

The LCD displays:

LINK CLK RATE

Where is 19200

9600

7200

4800

PRESS: NEXT or LAST

until the desired option displays

3600

2400

1200

20312-81

20312-82

PRESS: SELECT key

The multiplexer updates the link clock rate and returns the LINK PARAM-

ETERS/LINK CLK SOURCE display

Update the link Clock Source, or

PRESS: MON/CLR

to exit

Terminal Access

To access the CLOCK RATE parameter from the Main Menu:

TYPE: 2

PRESS: RETURN

The terminal displays:

LINK PARAMETERS:

1. 2.CLOCK SOURCE: INTERNAL CLOCK RATE: 9600

(ENTER 1-2 <CR> TO SELECT PARAMETER, OR <CR> TO QUIT.):

20312-26

TYPE: 2

from the LINK PARAMETERS menu

PRESS: RETURN

2-48 154001UA

2. Operation of the 3028 Turbo Multiplexer

312-2

The terminal displays:

LINK CLOCK RATE: CURRENTLY: 9600

1: 3:19200 7200 5: 3600 7: 1200

2: 4: 9600 4800 6: 2400

(ENTER 1-3 <CR> TO CHANGE. <CR> TO RETAIN OLD SETTING.):

TYPE: n (n = clock rate option number)

PRESS: RETURN

The multiplexer updates the link clock rate and returns the LINK PARAM-

ETERS menu. If the RETURN key is pressed without entering a clock rate

option, the Main Menu is returned.

SupervisorySupervisory

Supervisory

SupervisorySupervisory

ParametersParameters

Parameters

ParametersParameters

The SUPERVISORY PARAMETERS command is used to examine and change

the parameters of the supervisory port. This port does not take part in connec-

tions, therefore , not all of the channel parameters are relevant. The supervisory

parameters are not copied when the COPY PARAMETERS command is used.

Refer to Table 2-5 for the supervisory parameters.

Table 2-5. Supervisory Commands and OptionsTable 2-5. Supervisory Commands and Options

Table 2-5. Supervisory Commands and Options

Table 2-5. Supervisory Commands and OptionsTable 2-5. Supervisory Commands and Options

COMMAND DEFAULT OPTIONS

SPEED 9600 50, 75, 110, 134, 150, 300, 600,

DATA BITS 8 8 or 7 STOP BITS 2 1, 1.5, 2 PARITY NONE/ODD NONE/ODD, NONE/EVEN,

RV FL CTL (Reverse Flow Control)

NOTE: These are the only supported supervisory parameters and options.

NONE DC3/DC1, DC2/DC1, DC4/DC2

1200, 1800, 2000, 2400, 3600,

4800, 7200, 9600 or AUTOB

ODD, EVEN, NONE/MARK,

NONE/SPACE

or NONE

Front Panel Access

Supervisory parameters are set using the CHANNEL PARAMETERS and

selecting the supervisor channel for configuration.

154001UA 2-49

3028 Turbo Statistical Multiplexer

From the COMMAND MODE display

PRESS: NEXT or LAST

until CHNL PARAMETERS displays on the second line

PRESS: SELECT

PRESS: LAST

to select the supervisor channel

PRESS: SELECT

the LCD displays:

CHNL PARAMETERS CHNL A SPEED

PRESS: NEXT or LAST

until the parameter to change displays

PRESS: SELECT

PRESS: NEXT or LAST

until the desired option displays

20312-83

PRESS: SELECT

The multiplexer updates the Supervisory Port and returns the next Supervisory

Port parameter display.

Terminal Access

To access the SUPERVISORY PORT parameter from the Main Menu:

TYPE: 3

PRESS: RETURN

The terminal displays:

SUPERVISORY PORT PARAMETERS:

1. 4.SPEED: 9600 PARITY: NONE/ODD

2. 5.DATA BITS: 8 REV FL CTL:

3. STOP BITS: 1 NONE

(ENTER 1-5 <CR> TO SELECT PARAMETER, OR <CR> TO QUIT.):

TYPE: n (n = supervisory parameter number)

PRESS: RETURN

TYPE: n (n = supervisory option number)

PRESS: RETURN

The multiplexer updates the Supervisory Port and returns the SUPERVISORY

PORT PARAMETERS menu. If the RETURN key is pressed without entering a

supervisory port option, the Main Menu is returned.

20312-29

2-50 154001UA

2. Operation of the 3028 Turbo Multiplexer

Copy ParametersCopy Parameters

Copy Parameters

Copy ParametersCopy Parameters

The COPY PARAMETERS command is used to copy parameters from one

channel to another or all channels. When this command is chosen all param-

eters are copied from the "from" channel to the "to" channel. When the ALL

option is chosen, the Supervisory Port options are not copied.

CAUTION

Do not Copy Parameters to a Channel That is Currently in use. Data Communications may be Disrupted due to Channel Parameter Incompatibility.

Front Panel Access

From the COMMAND MODE display:

PRESS: NEXT or LAST

until COPY PARAMETERS displays on the second line

PRESS: SELECT

The LCD displays:

COPY FROM CHNL *1 2 3 4 5 6 7 8

PRESS: NEXT or LAST

to choose the channel to copy FROM

PRESS: SELECT

The LCD displays:

COPY TO CHNL *1 2 3 4 5 6 7 8

PRESS: NEXT or LAST

to choose the channel to copy TO

From the display press LAST to display the ALL option.

PRESS: SELECT

The LCD displays:

20312-84

20312-85

Note

COPY PARAMETERS ACTION COMPLETE

20312-86

154001UA 2-51

3028 Turbo Statistical Multiplexer

PRESS: SELECT

to exit copy parameters

Terminal Access

To access the COPY PARAMETERS command from the Main Menu:

TYPE: 4

PRESS: RETURN

The terminal displays:

COPY PARAMETERS FROM:

SELECT CHANNEL NUMBER (1-8) <CR>:

TYPE: n (n = the channel to copy FROM)

PRESS: RETURN

The terminal displays:

20312-30

TO:

SELECT CHANNEL NUMBER (1-8 OR ALL) <CR>:

TYPE: n or ALL (n = the channel to copy TO)

PRESS: RETURN

The multiplexer copies the parameters to the specified channel(s) and returns

you to the Main Menu.

The CHANNEL STATISTICS command provides a display of the current and

peak buffer utilization statistics, the counts of errors, and flow control or reverse

flow control conditions invoked for each of the ports. Each channel is assigned

a minimum buffer space to prevent lockout.

The statistics recorded include:

CURRENT BUFFER UTILIZATION. This percentage indicates the amount

of buffer usage currently for this channel.

PEAK BUFFER UTILIZATION. This percentage indicates the channel

buffer usage when all channels together were at the highest total utilization

since the last statistics reset.

CHANNEL EXCEPTIONS. This lists the number of exceptions since the

last statistic reset. Exceptions are parity errors and framing errors. High

exception counts generally indicate a wrong speed or parity setting.

20312-31

Channel StatisticsChannel Statistics

Channel Statistics

Channel StatisticsChannel Statistics

FLOW CONTROL. The number of times flow control has been invoked

since the last statistics reset.

REVERSE FLOW CONTROL. The number of times reversed flow control

has been invoked since the last statistics reset.

2-52 154001UA

2. Operation of the 3028 Turbo Multiplexer

Front Panel Access

From the COMMAND MODE display:

PRESS: NEXT or LAST

until CHNL STATUS displays on the second line

PRESS: SELECT

PRESS: NEXT or LAST

to choose a channel number

PRESS: SELECT

The LCD displays:

CHNL STATISTICS

Where is BF UTIL nn% CURR

(Current Buffer Utilization)

BF UTIL nn% PEAK

(Peak Buffer Utilization)

EXC nnnn FC nnnn

(Channel Exceptions - Flow Control)

RV FC nnnn

(Reverse Flow Control)

20312-87

PRESS: NEXT or LAST

to scroll through statistics

PRESS: MON/CLR

to exit

Note

nn is the utilization percentage. nnn is the number or occurrences.

To update the channel statistics display:

PRESS: SELECT

To display the channel status in real-time (continuous update):

PRESS & HOLD: SELECT

PRESS: MON/CLR

Release the keys. The display is continuously updated each second, providing

the ability to dynamically track the displayed channel statistics parameter.

PRESS: MON/CLR

to exit

154001UA 2-53

3028 Turbo Statistical Multiplexer

Terminal Access

To access CHANNEL STATISTICS from the Main Menu:

TYPE: 5

PRESS: RETURN

The terminal displays:

CHANNEL STATISTICS:

CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8 TOTAL

CURRENT BUFFER UTIL: 02% 02% 02% 02% 02% 02% 02% 02% 16%

PEAK BUFFER U TIL: 02% 02% 02% 02% 02% 02% 02% 02% 16%

CHANNEL EXCEPTIONS: 0000 0000 0000 0000 0000 0000 0000 0000 00000

FLOW CONTROLS : 0000 0000 0000 0000 0000 0000 0000 0000 00000

REV FLOW CONTROLS: 0000 0000 0000 0000 0000 0000 0000 0000 00000

(ENTER <CR> TO EXIT.)

20312-32

to exit

PRESS: RETURN

2-54 154001UA

2. Operation of the 3028 Turbo Multiplexer

Link StatisticsLink Statistics

Link Statistics

Link StatisticsLink Statistics

The LINK STATISTICS command provides current and peak link utilization

statistics, together with current and peak activity for both directions of the link.

These statistics are updated once a second.

The statistics recorded include:

CURRENT TRANSMIT LINK UTILIZATION. This is the current percent-

age of total link bandwidth used in the transmit direction in the most recent

second.

PEAK TRANSMIT LINK UTILIZATION. This is the highest percentage of

total link bandwidth used in the transmit direction for any one-second

interval since the last reset.

CURRENT RECEIVE LINK UTILIZATION. This is the current percentage

of total link band width used in the receive direction in the most recent

second.

PEAK RECEIVE LINK UTILIZATION. This is the highest percentage of

total link bandwidth used in the receive direction for any one-second

interval since the last reset.

CURRENT FRAMES RECEIVED. This is the number of frames received in

the last second.

PEAK FRAMES RECEIVED. This is the highest number of frames received

in a second since the last reset.

CURRENT ERROR FRAMES RECEIVED. This is the number of errored

frames received in the last second.

PEAK ERROR FRAMES RECEIVED. This is the highest number of

errored frames received in a second since the last reset.

CURRENT RESENT FRAMES. This is the number of retransmitted frames

in the last second.

PEAK RESENT FRAMES. This is the highest number of retransmitted

frames in a second since the last reset.

Front Panel Access

From the COMMAND MODE display:

PRESS: NEXT or LAST

until LINK STATISTICS displays on the second line

PRESS: SELECT

154001UA 2-55

3028 Turbo Statistical Multiplexer

The LCD displays:

LINK STATISTICS

Where is FR RECD nnn CURR

(Current Frames Received)

FR RECD nnn PEAK

(Peak Frames Received)

FR NAKD nnn CURR

(Current ErroredFrames Received)

FR NAKD nnn PEAK

(Peak Errored Frames Received)

FR RSNT nnn CURR

(Current Resent Frames)

FR RSNT nnn PEAK

(Peak Resent Frames)

TX UTIL nn% CURR

(Current Transmit Link Utilization)

TX UTIL nn% PEAK

(Peak Transmit Link Utilization)

RX UTIL nn% CURR

(Current Receive Link Utilization)

RX UTIL nn% PEAK

(Peak Receive Link Utilization)

20312-88

PRESS: NEXT or LAST

to scroll through the statistics

PRESS: MON/CLR

to exit

Note

nnn is the number of frames. nn is the utilization percentage.

To update the link statistics display:

PRESS: SELECT

To display the channel status in real-time (continuous update):

PRESS: SELECT & MON/CLR simultaneously

Release the push buttons. The display is continuously updated each second,

providing the ability to dynamically track the displayed link statistic parameter.

PRESS: MON/CLR

to exit

2-56 154001UA

Terminal Access

312-3

To access LINK STATISTICS from the Main Menu:

TYPE: 6

PRESS: RETURN

The terminal displays:

LINK STATISTICS:

CURRENT TRANSMIT LINK UTILIZATION: 00%

PEAK TRANSMIT LINK UTILIZATION: 00%

CURRENT RECEIVE LINK UTILIZATION: 00%

PEAK RECEIVE LINK UTILIZATION: 00%

CURRENT FRAMES RECEIVED PER SECOND: 000

PEAK FRAMES RECEIVED PER SECOND: 000

CURRENT ERRORED FRAMES RECD. PER SEC.: 000

PEAK ERRORED FRAMES RECD. PER SECOND: 000

CURRENT RESENT FRAMES PER SECOND: 000

PEAK RESENT FRAMES PER SECOND: 000

(ENTER <CR> TO EXIT.)

2. Operation of the 3028 Turbo Multiplexer

to exit

PRESS: RETURN

154001UA 2-57

3028 Turbo Statistical Multiplexer

Note

In Supervisory Mode, do not Issue a Channel Loopback to the Data Channel you are Attached to; Communications is Lost to That Channel.

The LOCAL CHANNEL LOOPBACK command sets or clears, on a selected local

channel, the inward and outward looping of the receive and transmit data streams

at the channel interface. The signals incoming on Pin 2 (TxD) are looped back on

Pin 3 (RxD) and data incoming from the link to the looped channel is sent back to

the link as received (Figure 2-10). This parameter is an effective troubleshooting

mechanism, but disrupts the normal channel traffic for the duration of the

loopback state. This command acts as a toggle switch. The second time it is

selected the channel loopback is cleared.

A CHANNEL RESET, System Reset, or power failure will clear a channel loopback

state. To determine the loopback status use the CHANNEL STATUS command.

Local Channel LoopbackLocal Channel Loopback

Local Channel Loopback

Local Channel LoopbackLocal Channel Loopback

LOCAL

CHANNEL

LOOPBACK

LOCAL

LINK

LOOPBACK

Figure 2-10. Loopback Points from 3028 Figure 2-10. Loopback Points from 3028

Figure 2-10. Loopback Points from 3028

Figure 2-10. Loopback Points from 3028 Figure 2-10. Loopback Points from 3028

Front Panel Access

From the COMMAND MODE display:

Turbo (CTS 2031 Turbo)Turbo (CTS 2031 Turbo)

Turbo (CTS 2031 Turbo)

Turbo (CTS 2031 Turbo)Turbo (CTS 2031 Turbo)

REMOTE

CHANNEL

LOOPBACK

20312-34

Multiplexer A Multiplexer A

Multiplexer A

Multiplexer A Multiplexer A

PRESS: NEXT or LAST

until LOC CHNL LOOPK BK displays on the second line

PRESS: SELECT

PRESS: NEXT or LAST

to choose a channel number

2-58 154001UA

2. Operation of the 3028 Turbo Multiplexer

312-3

PRESS: SELECT

The multiplexer sets or clears the local channel loopback on the designated

channel and returns to the COMMAND MODE display. A message, with the time

the loopback occurred, is stored in the MONITOR MODE queue to be displayed

when the mode is entered.

Terminal Access

To access LOCAL CHANNEL LOOPBACK from the Main Menu:

TYPE: 7

PRESS: RETURN

TYPE: n (n = the channel to be looped/cleared)

PRESS: RETURN

When a channel loopback is activated the terminal displays:

When a channel loopback is cleared the terminal displays:

LOCAL CHANNEL LOOPBACK ACTIVE. <CR> TO EXIT.

The multiplexer performs the local channel loopback. A message, with the time the

LOCAL CHANNEL LOOPBACK CLEARED. <CR> TO EXIT.

loopback occurred, is stored in the MONITOR MODE queue to be displayed when

the mode is entered.

PRESS: RETURN

to exit

154001UA 2-59

3028 Turbo Statistical Multiplexer

The REMOTE CHANNEL LOOPBACK command sets or clears, on a selected

remote channel, the inward and outward looping of the receive and transmit

data streams at the serial interface (Figure 2-10). This command acts as a toggle

switch. The second time it is selected the remote channel loopback is cleared.

A CHANNEL RESET, System Reset, or power failure on the remote multiplexer

will also clear a remote channel loopback. To determine the loopback status use

the CHANNEL STATUS command.

Front Panel Access

From the COMMAND MODE display

PRESS: NEXT or LAST

until REM CHNL LOOPBK displays on the second line

PRESS: SELECT

PRESS: NEXT or LAST

to choose a channel number

PRESS: SELECT

The multiplexer sets or clears the remote channel loopback on the designated

channel and returns to the COMMAND MODE display. A message, with the

time the loopback occurred, is stored in the MONITOR MODE queue to be

displayed when the mode is entered.

Remote ChannelRemote Channel

Remote Channel

Remote ChannelRemote Channel

LoopbackLoopback

Loopback

LoopbackLoopback

Terminal Access

To access REMOTE CHANNEL LOOPBACK from the Main Menu:

TYPE: 8

PRESS: RETURN

TYPE: n (n = the channel to be looped/cleared)

PRESS: RETURN

When a remote channel loopback is activated the terminal displays:

REMOTE CHANNEL LOOPBACK ACTIVE. <CR> TO EXIT.

When a remote channel loopback is cleared the terminal displays:

REMOTE CHANNEL LOOPBACK CLEARED. <CR> TO EXIT.

20312-38

20312-39

2-60 154001UA

2. Operation of the 3028 Turbo Multiplexer

The multiplexer performs the remote channel loopback. A message, with the

time the loopback occurred, is stored in the MONITOR MODE queue to be

displayed when the mode is entered.

PRESS: RETURN

to exit

Local Link LoopbackLocal Link Loopback

Local Link Loopback

Local Link LoopbackLocal Link Loopback

The LOCAL LINK LOOPBACK command sets and clears a bidirectional

loopback function on the link port. When activated the link port will loop all

data sent from the channels to the link back to the respective channel ports

(Figure 2-10). At the same time, it will loop outward on Pin 2 (TxD) all data

received on Pin 3 (RxD). This command is not usable in remote supervisory

mode since it will disrupt remote communications. This command acts as a

toggle switch. The first time it is selected the local link loopback is activated.

The second time it is selected the local link loopback is cleared.

During a link loopback state, the link down LED on the front panel will flash to

indicate the existence of the loopback state.

A LINK RESET, System Reset or power failure will also clear a local link

loopback state.

Front Panel Access

From the COMMAND MODE display:

PRESS: NEXT or LAST

until LINK LOOPBACK displays on the second line

PRESS: SELECT

The multiplexer performs the link loopback and returns to the COMMAND

MODE display. A message, with the time loopback occurred, is stored in the

MONITOR MODE queue to be displayed when the mode is entered.

Terminal Access

To access LOCAL LINK LOOPBACK from the Main Menu:

TYPE: 9

PRESS: RETURN

The multiplexer performs the link loopback and returns to the Main Menu. A

message, with the time loopback occurred, is stored in the MONITOR MODE

queue to be displayed when the mode is entered.

154001UA 2-61

3028 Turbo Statistical Multiplexer

The CHANNEL RESET command causes the local and remote ends to be reset.

It clears the channel data buffers, any flow control XOFF state (if present and if

the channel has the option), and any reverse flow control XOFF state. In addi-

tion, it removes any forced EIA output signals on the local end (refer to the

Channel Status section). The channel reset function will cause an event display

in MONITOR MODE. The event lists the occurrence of the reset, the channel

number, and the time.

Note

A channel reset normally acts upon both ends of a connection. The exception is when the reset is invoked upon a channel which is in Supervisory mode; in this case a channel reset is only done on the local end. It should be noted that the CHANNEL RESET command will cause data in the buffers to be cleared, so it should be used with caution. It will not clear forced EIA outputs on the remote end.

Front Panel Access

When using the front panel, you can reset all of the channels simultaneously by

using the option: ALL CHANNELS

Channel ResetChannel Reset

Channel Reset

Channel ResetChannel Reset

From the COMMAND MODE display:

PRESS: NEXT or LAST

until CHNL RESET displays on the second line

PRESS: SELECT

PRESS: NEXT or LAST

to choose a channel number or ALL CHANNELS

PRESS: SELECT

The multiplexer resets the designated channel(s) and returns to the COM-

MAND MODE display. A message, with the time the channel reset occurred, is

stored in the MONITOR MODE queue to be displayed when the mode is

entered.

Terminal Access

To reset a SINGLE CHANNEL, from the Main Menu:

TYPE: 10

PRESS: RETURN

TYPE: n (n = the channel to be reset)

PRESS: RETURN

To reset ALL CHANNELS, from the Main Menu:

TYPE: 11

PRESS: RETURN

2-62 154001UA

2. Operation of the 3028 Turbo Multiplexer

The multiplexer resets the designated channel(s), and returns the Main Menu.

A message, with the time the channel reset occurred, is stored in the MONI-

TOR MODE queue to be displayed when the mode is entered.

Link ResetLink Reset

Link Reset

Link ResetLink Reset

The LINK RESET command clears and reestablishes communications with the

other multiplexer over the link. The multiplexer continually tries to establish a

link connection when it is down, therefore, this command is used for test

purposes on an established link.

Note

This command will interfere with normal data traffic on the link.

Front Panel Access

From the COMMAND MODE display:

PRESS: NEXT or LAST

until LINK RESET displays on the second line

PRESS: SELECT

The multiplexer resets the link and returns to the COMMAND MODE display.

A message, with the time Link Reset occurred, is stored in the MONITOR

MODE queue to be displayed when the mode is entered.

Terminal Access

To access LINK RESET from the Main Menu:

TYPE: 12

PRESS: RETURN

The multiplexer resets the link and returns to the Main Menu. A message, with

the time Link Reset occurred, is stored in the MONITOR MODE queue to be

displayed when the mode is entered.

154001UA 2-63

3028 Turbo Statistical Multiplexer

The STATISTICS RESET command resets all link and channel current and

peak histories.

Front Panel Access

From the COMMAND MODE display:

PRESS: NEXT or LAST

until STATISTICS RESET displays on the second line

PRESS: SELECT

The multiplexer resets the statistics and returns the COMMAND MODE

display.

Terminal Access

To access STATISTICS RESET from the Main Menu:

TYPE: 13

PRESS: RETURN

The multiplexer resets the statistics and returns to the Main Menu.

The CHANNEL VALIDATE command initiates a test of the data path end-to-

end for the selected channel. A test word is sent to the remote end of a connec-

tion and looped back. If the initiating channel receives the looped back test

word, the test is passed. If the test word is not received back at the initiating

channel within five seconds, the test is failed.

Statistics ResetStatistics Reset

Statistics Reset

Statistics ResetStatistics Reset

Channel ValidateChannel Validate

Channel Validate

Channel ValidateChannel Validate

Note

This channel validate test is non-interfering and can be initiated while data traffic is active.

Front Panel Access

From the COMMAND MODE display:

PRESS: NEXT or LAST

until CHNL VALIDATE displays on the second line

PRESS: SELECT

PRESS: NEXT or LAST

to choose a channel number

PRESS: SELECT

2-64 154001UA

The LCD displays:

312-4

CHNL n VALIDATE: TEST ACTIVE

If the test passed, the LCD displays:

CHNL n VALIDATE: TEST PASSED

If the test failed, the LCD displays:

CHNL n VALIDATE: TEST FAILED

PRESS: MON/CLR

to exit

2. Operation of the 3028 Turbo Multiplexer

20312-89

20312-90

20312-91

Terminal Access

To access CHANNEL VALIDATE, from the Main Menu:

TYPE: 14

PRESS: RETURN

TYPE: n (n = the channel number to be tested)

PRESS: RETURN

If the test passed, the terminal displays:

VALIDATE TEST PASSED. <CR> TO EXIT.

If the test failed, the terminal displays:

VALIDATE TEST FAILED. <CR> TO EXIT.

PRESS: RETURN

to exit

154001UA 2-65

3028 Turbo Statistical Multiplexer

The CHANNEL STATUS command provides information on flow control,

reverse flow control, data activity (in the last two minutes), remote and local

loopback status, and the polarity of the RS-232-C control leads.

Appendix J provides information on the EIA Signal Exceptions.

Front Panel Access

From the COMMAND MODE display:

PRESS: NEXT or LAST

until CHNL STATUS displays on the second line

PRESS: SELECT

PRESS: NEXT or LAST

to choose a channel number

PRESS: SELECT

The LCD displays:

CHNL STATUS

20312-92

Where is DRS xxx BO xxx

(Data Rate (Secondary) Select - Busy Out)

DTR xxx RTS xxx

(Data Terminal Ready - Ready To Send)

CTS xxx RI xxx

(Clear To Send - Ring Indicator)

DCD xxx DSR xxx

(Data Carrier Detect - Data Set Ready)

LLB xxx RLB xxx

(Local Loopback - Remote Loopback)

FC xxx RFC xxx

(Flow Control - Reverse Flow Control)

ACTIVITY zzz

Channel StatusChannel Status

Channel Status

Channel StatusChannel Status

PRESS: NEXT or LAST

to scroll through status

Note

xxx is ON or OFF depending on the selection. zzz is YES or NO depending on the selection.

To update the channel status display:

PRESS: SELECT

2-66 154001UA

2. Operation of the 3028 Turbo Multiplexer

To display the channel status in real-time (continuous update):

PRESS & HOLD: SELECT

PRESS: MON/CLR

Release the push buttons. The display is continuously updated each second,

providing the ability to dynamically track the displayed channel status param-

eter.

PRESS: MON/CLR

to exit

The CHNL STATUS function can be used to force certain EIA leads ON or

OFF.

When CTS xxx RI xxx or DCD xxx DSR xxx is displayed, an asterisk (*) is

displayed before the option that can be changed. Only the EIA outputs CTS, RI,

DCD and DSR can be changed. The change is from ON to OFF similar to a

toggle switch. To change a display:

PRESS: SELECT

The display will have an

forced by the operator. The CHANNEL PARAMETER CTS_RTS ENABLED is

overridden when the CTS signal is forced using this command.

@ symbol before the xxx indicating the change was

Note

A CHANNEL RESET or System Reset will remove a forced condition. A power failure will not reset the forced condition.

To update the next parameter:

PRESS: NEXT

PRESS: MON/CLR

to exit

Terminal Access

To access CHANNEL STATUS, from the Main Menu:

TYPE: 15

PRESS: RETURN

TYPE: n (n = the channel number)

PRESS: RETURN

154001UA 2-67

3028 Turbo Statistical Multiplexer

The terminal displays:

CHANNEL n STATUS:

EIA OUTPUTS: EIA INPUTS: STATUS:

1. CTS: OFF DSRS: OFF LOCAL LOOPBACK: OFF

2. RI: OFF BO: OFF REMOTE LOOPBACK: OFF

3. DCD: OFF RTS: OFF DATA ACTIVITY: NO

4. DSR: OFF DTR: OFF FLOW CONTROL: OFF

REV FL CONTROL: OFF

(ENTER 1-4 <CR> TO SET OR RELEASE OUTPUT SIGNAL, OR <CR> TO EXIT.):

To change the EIA output options:

TYPE: n (n = the number of the output to change)

PRESS: RETURN

20312-42

The display will have an

@ symbol after the ON or OFF indicating the change

was forced by the operator.

Note

A CHANNEL RESET or System Reset will remove a forced condition. A power failure will not reset the forced condition.

The Main Menu is displayed after an EIA output is changed. To verify that the

EIA output was updated, the parameter must be selected again.

The REMOTE SIGNON command is used in a point-to-point application with a

3028 Turbo (CTS 2031 Turbo) multiplexer at each end. It allows access to the

supervisory functions at the remote end. Any command that is available on the

local supervisory facility can be accessed except Remote Signon, Link Reset, and

Link Loopback. When in remote supervisor mode , the LOGOFF command and the

REMOTE SIGNOFF command will both cause the remote supervisor to be signed

Note

Ensure that supervisory mode is enabled at the local and remote ends before attempting to sign on through a standard channel port.

Remote SignonRemote Signon

Remote Signon

Remote SignonRemote Signon

off.

Front Panel Access

From the COMMAND MODE display:

2-68 154001UA

2. Operation of the 3028 Turbo Multiplexer

PRESS: NEXT or LAST

until REMOTE SIGNON displays on the second line

PRESS: SELECT

The multiplexer indicates access of supervisor mode at the remote end with the

COMMAND MODE display. The display is in lowercase indicating remote access.

command mode chnl parameters

20312-96

If the remote front panel is already in supervisor mode, the following message is

displayed and access is denied.

COMMAND MODE supervisor busy

20312-93

Terminal Access

The remote signon is available to a terminal attached through a dedicated local

supervisory port, a local floating supervisory port (a designated data channel that

is enabled for supervisory access), or any terminal in the network that is connected

to the supervisor facility. Only one terminal can be logged on as supervisor at a

time.

To access REMOTE SIGNON from the Main Menu:

TYPE: 16

Note

When a user is logged on to a remote channel as supervisor, the attached device at the remote end is effectively disabled until signoff.

PRESS: RETURN

The terminal displays the system menu from the remote 3028 Turbo (CTS 2031

Turbo) multiplexer or a prompt for the password to be entered, if one is pro-

grammed. Enter the password.

PRESS: RETURN

The menu appears and you are logged on and may continue to change or inquire

about the parameters.

When signed on to a remote multiplexer as supervisor, all menus and displays are

generated by the remote multiplexer. To clarify which node one is talking to,

especially if jumping between remote and local supervisor modes, it is a good idea

to modify the system banner to indicate the identity of the node producing the

menu. This can be done via the SET SYSTEM BANNER command.

154001UA 2-69

3028 Turbo Statistical Multiplexer

If the supervisory function is currently in use, access is denied and the terminal

displays:

SUPERVISOR MODE ALREADY ACTIVE.

<CR> TO EXIT.):

20312-43

The REMOTE SIGNOFF command logs off the supervisory facility at the

remote site multiplexer. If the remote supervisor is not logged on, this com-

mand has no effect.

Front Panel Access

From the COMMAND MODE display:

PRESS: NEXT or LAST

until REMOTE SIGNOFF displays on the second line

command mode remote signoff

20312-97

PRESS: SELECT

The multiplexer logs off the remote multiplexer and returns to local operation.

command mode remote signedoff

20312-98

A message is stored in MONITOR mode indicating the signoff and the time.

Remote SignoffRemote Signoff

Remote Signoff

Remote SignoffRemote Signoff

Terminal Access

To access REMOTE SIGNOFF from the Main Menu:

TYPE: 17

PRESS: RETURN

The multiplexer logs off the remote multiplexer and returns to local operation.

A message is stored in MONITOR MODE indicating the signoff and the time.

2-70 154001UA

2. Operation of the 3028 Turbo Multiplexer

312-4

Set System PasswordSet System Password

Set System Password

Set System PasswordSet System Password

ENTER FIXED PASSWORD <CR>:

The SET SYSTEM PASSWORD command is used to set or change the pass-

word required to access the supervisory functions. A fixed password entry

protects against entry by unauthorized users. Before the prompt is displayed to

enter a new password the correct fixed password must be entered. This func-

tion is only available from an attached terminal. The password can be any

combination of alphanumeric characters and symbols, except RETURN, up to 19

characters.

To access SET SYSTEM PASSWORD from the Main Menu:

TYPE: 18

PRESS: RETURN

The terminal displays:

Enter the fixed password )&(

If the incorrect entry is made, the prompt is repeated two more times for the

correct entry. If the correct entry is made, the screen displays:

ENTER NEW PASSWORD <CR>:

TYPE: password (password = the selected password)

PRESS: RETURN

To delete a password completely, enter a CARRIAGE RETURN for the new

password entry.

The terminal displays:

ENTER AGAIN TO VERIFY <CR>:

TYPE: password (password = the same entry as above)

PRESS: RETURN

to exit without gaining access

154001UA 2-71

3028 Turbo Statistical Multiplexer

The SET SYSTEM BANNER command allows you to program the top line on

the Main Menu. The system accepts up to 60 characters and prints them each

time the Main Menu is displayed.

To access SET SYSTEM BANNER from the Main Menu:

TYPE: 19

PRESS: RETURN

The terminal displays:

BANNER CURRENTLY: S Y S T E M M E N U :

ENTER NEW BANNER <CR>:

Type in the new banner up to 60 characters.

PRESS: RETURN

The system changes the banner and displays the Main Menu.

Set System BannerSet System Banner

Set System Banner

Set System BannerSet System Banner

20312-47

Note

The banner will survive a power failure. A System Reset will return the factory default banner.

The SET SYSTEM TIME command allows the operator to set the clock for

Monitor event messages and the logon message. If the time is not set, the

system time is reported based on the power-on value of 00:00:00.

Note

The multiplexer uses a 24-hour clock.

Entries using this command should reflect

this. The system time is reset to

00:00:00after a power failure.

Front Panel Access

From the COMMAND MODE display:

Set System TimeSet System Time

Set System Time

Set System TimeSet System Time

PRESS: NEXT or LAST

until SET TIME displays as the second line

PRESS: SELECT

2-72 154001UA

2. Operation of the 3028 Turbo Multiplexer

312-4

The LCD displays:

SET TIME 00:00:00

PRESS: SELECT

to move from hours to minutes to seconds

PRESS: NEXT or LAST

to set each setting

PRESS: MON/CLR

to exit

Terminal Access

To access SET SYSTEM TIME from the Main Menu:

TYPE: 20

PRESS: RETURN

The terminal displays:

20312-94

Disable/EnableDisable/Enable

Disable/Enable

Disable/EnableDisable/Enable Front PanelFront Panel

Front Panel

Front PanelFront Panel

CURRENT SYSTEM TIME: 05:47:05

ENTER NEW TIME <CR>:

Enter the time in the format hh:mm:ss with colons separating the three fields.

PRESS: RETURN

If the time set is accepted, the Main Menu displays. If the time set is not ac-

cepted, the prompt is returned.

The DISABLE/ENABLE FRONT PANEL command disables or enables the

push buttons on the front panel of the multiplexer. This function is only avail-

able from an attached terminal. This command acts as a toggle switch, the first

time it is selected the front panel is disabled, the second time, the front panel is

enabled. When using this command ensure that the correct front panel is being

disabled/enabled.

To access DISABLE /ENABLE FRONT PANEL from the Main Menu:

TYPE: 21

PRESS: RETURN

154001UA 2-73

3028 Turbo Statistical Multiplexer

The terminal displays:

FRONT PANEL CURRENTLY ENABLED.

(ENTER 1 <CR> TO CHANGE SETTING, OR <CR> TO EXIT.):

TYPE: 1

to change the setting

PRESS: RETURN

to update, change or exit with no change

20312-95

The MONITOR MODE command causes the supervisor to be logged off, and

the events to be displayed. The monitor mode queue will store the 16 most

recent local and remote events to display.

Front Panel Access

From the COMMAND MODE display:

PRESS: MON/CLR

The LCD displays:

MONITOR MODE

REV 938 14.0

20312-52

This display appears until an event occurs. REV nnn.nn indicates the PROM

level on the multiplexer board. When you first enter MONITOR MODE (after

the PROM level display), events that have been stored in the queue display in

the order they occurred.

Terminal Access

To access MONITOR MODE from the Main Menu:

Monitor ModeMonitor Mode

Monitor Mode

Monitor ModeMonitor Mode

TYPE: 22

PRESS: RETURN

The terminal displays:

MONITOR MODE

REV 938 14.0

20312-3

2-74 154001UA

2. Operation of the 3028 Turbo Multiplexer

312-4

This display appears until an event occurs. REV nnn.nn indicates the PROM

level on the multiplexer board. When you first enter MONITOR MODE (after

the PROM level display), events that have been stored in the queue display in

the order they occurred.

LogoffLogoff

Logoff

LogoffLogoff

RESETTING THERESETTING THE

RESETTING THE

RESETTING THERESETTING THE MULMUL

TIPLEXERTIPLEXER

MUL

TIPLEXER

MULMUL

TIPLEXERTIPLEXER

The LOGOFF parameter ends the COMMAND MODE function and allows

supervisory access to other users.

To access LOGOFF from the Main Menu:

TYPE: 23

PRESS: RETURN

The terminal displays:

SUPERVISORY SIGNOFF AT 10:10:00

Coldstart

To reset the multiplexer:

1. Ensure that the front panel is in MONITOR mode.

2. Press & Hold the SELECT push button while pressing the NEXT push

button.

Note

When the Multiplexer is RESET all Buffers, Channel and Link Loopbacks, and the Supervisor Password are Cleared. The Supervisor is also Logged off.

The Channel and Link Parameters are Reset to the Factory Specified Defaults.

The system is reset and the front panel displays:

SYSTEM READY

00:00:00

20312-51

Warmstart

To reset the multiplexer without returning to the factory-set defaults, remove

power to the unit. Restore power to the unit. The multiplexer is reset, but the

set values remain the same.

154001UA 2-75

A. Multiplexer Command Mode Summary

A.A.

COMMANDCOMMAND

COMMAND

COMMANDCOMMAND MODE USEMODE USE

MODE USE

MODE USEMODE USE

Front Panel AccessFront Panel Access

Front Panel Access

Front Panel AccessFront Panel Access

Multiplexer Command Mode SummarMultiplexer Command Mode Summar

Multiplexer Command Mode Summar

Multiplexer Command Mode SummarMultiplexer Command Mode Summar

Command Mode Use ................................................................................................................................ A-1

Front Panel Access...........................................................................................................................A-1

Terminal Access ............................................................................................................................... A-1

This appendix summarizes the usage of the COMMAND mode commands,

listing each parameter available for change and its options, in a flowchart

format, in the order they are displayed.

The COMMAND mode is entered by pressing the NEXT push button from the

MONITOR or STANDBY modes. After entering the COMMAND mode the

commands are listed on the second line of the display. The NEXT or LAST

push buttons will advance through the commands, forward or backwards

respectively, changing the second line display accordingly. To access the

command parameters, press the SELECT push button. The command is dis-

played on the first line and the parameter is displayed on the second line. Use

the NEXT or LAST push button to scroll through the parameters. Use the

SELECT push button to access the parameter options. The parameter is dis-

played on the first line and the options are displayed on the second line. The

NEXT and LAST push buttons will scroll through the options. The SELECT

push button will update the multiplexer. The MON/CLR push button can be

used at any time to exit to the COMMAND mode display without updating

parameter values.

Terminal AccessTerminal Access

Terminal Access

Terminal AccessTerminal Access

154001UA A-1

SUPERVISOR mode is entered by pressing the <supervisor logon character> from

a port that has the supervisor enabled. If the password has been previously

programmed, a prompt is displayed. If a password is not in use, the Main

Menu is displayed.

After the Main Menu is displayed, menu items can be selected by typing the

number before the item and pressing RETURN. This will display a second-level

menu, a list of options, or instructions for command usage. The RETURN key

can be used at any time to exit the Main Menu.

Note

The following flowchart is designed to be used by anyone with operating experience on the 3028 multiplexer. It should be used as a reference tool for configuration.

Turbo (CTS 2031 Turbo)

3028 Turbo Statistical Multiplexer

This Page Left Blank

154001UAA-2

154001UA A-3

3028 8

Mul

Mod

Channel

Parameters

Select

Channel

Speed

Parity

Break

Flyback

CTS-

Type

Data

Bits

Stop

Bits

Flow

Ctl

Rev

Flow

Ctl

Flow

Ctl TR

EIA

Prop

Echo

RTS

19200 9600 7200 4800 3600 2400 2000 1800 1200

ASYNC HPENQ SDLC/HDLC

8 7 6 5

1.5 2

NONE/ODD NONE/EVEN ODD EVEN

NONE DC3/DC1 DC2/DC1 DC4/DC2

YES NO

600 300 150

134.5 110

50 DOWNL AUTOB

Link

Parameters

Link

Source

Link

Rate

NONE/MARK NONE/SPACE

USER WANG TANDEM CTS-/CTS+ DSR-/DSR+

USER WANG RTS-/RTS+ DTR-/DT R+

Msgs Enab

Spvr

Enab

Inac Disc

Disc Char

Turbo

Supervisory Parameters

EXTERNAL

Clk

INTERNAL

19200

9600

Clk

7200 4800 3600 2400 1200

YES NO

NONE CTL-T USER

Speed

Data

Bits

Stop

Bits

Parity

Rev Flow

Ctl

9600 7200 4800 3600 2400 2000 1800 1200

8 7 6 5

1.5 2

NONE/ODD NONE/EVEN ODD EVEN

NONE DC3/DC1 DC2/DC1 DC4/DC2

Mode Display

Superviso r

Signoff At

tiplexer Command d

Link

Statistics

Disp la y ed

Statistics

Reset

Statistics

Res et Main

Me nu

Disp l ayed

600 300 150

134.5 110

75 50

AUTOB

9600

Enter

Monitor

Mod e

Enter

Monitor

Mod e

Parity

Monitor

hh:mm :ss

Select

Ch annel

NONE/MARK NONE/SPACE

USER WANG RTS-/RTS+ DTR-/DT R+

Copy

Parameters

Copy From

Channel

Select

Channel

Copy

Terminal

Select

Channel

or Al l

Defau l t S e ttin g

Command

Term i na l On ly

Command

Parameter

Termi n a l Displ ay

Decision

Channel Statistics

Statistics

Disp la y ed

Reset

Link

Monitor

Mode Display

Link

Reset

Local

Channel

Loopback

Select

Chan nel

Monitor

Mode Display

Ch annel

Looped

Ch an ne l

Val id ate

Select

Ch annel

Pass/Fail Message

Disp l ayed

Set System Banner

Enter New

Banner

e Summary

Remote

Channel

Loopback

Select

Ch annel

Monitor

Mode Display

Ch annel

Looped

Ch an ne l

Status

Select

Ch annel

Status

Disp l ayed

Set

System

Time

Set

Time

hh:mm :ss

Local

Link

Loopback

Monitor

Mode Display

Link

Looped

Remote

Sign on

Monitor

Mode Display

Superviso r

Signon At

hh:mm :ss

Dis able/Enable

Front

Panel

When Enabled

Front Panel Not

Operational

Channel

Select

Ch annel

Monitor

Mode Display

Ch annel

Reset Single

Reset

Remote

Sign off

Monitor

Mode Display

Superviso r

Signoff At

hh:mm :ss

Enter

Monitor

Mo de

System Display Monitor

Mod e

Reset

All

Channel s

Select

Ch annel

Monitor

Mode Display

Ch annel

Reset

Set

System

Password

Enter

Fixed

Password

Enter

New

Password

Enter

Again To

Verify

Lo goff

Monitor

Mode Display

Superviso r

Signoff At

hh:mm :ss

A. Multiplexer Command Mode Summary

B. Technical Specifications

B. TB. T

B. T

B. TB. T

MULMUL

MUL

MULMUL TECHNICALTECHNICAL

TECHNICAL

TECHNICALTECHNICAL SPECIFICASPECIFICA

SPECIFICA

SPECIFICASPECIFICA

echnical Specificationsechnical Specifications

echnical Specifications

echnical Specificationsechnical Specifications

TIPLEXERTIPLEXER

TIPLEXER

TIPLEXERTIPLEXER

TIONSTIONS

TIONS

TIONSTIONS

Multiplexer Technical Specifications.................................................................................................. B-1

Approvals .................................................................................................................................................B-1

POWER SUPPLY

115/230Vac, 50/60 Hz, 0.16/0.08 A, Switch Selectable

HEAT DISSIPATION

7 Btu/hr

ENVIRONMENT

Operating Temp: ........... 32ºF (0ºC) to 113ºF (45ºC)

Storage: ........................... -4ºF (-20ºC) to 158ºF (7ºC)

Rel Humitity: ................. 5% to 90% non-condensing

DIMENSIONS

Height: ...... 1.75 in. (4.44cm)

Width: ....... 17.00 in. (43.18cm)

Depth: ........ 12.00 in. (18.93cm)

WEIGHT

4.5 lb (2.1 kg)

INTERFACE STANDARDS

RS-232-C

V.24

LINK PROTOCOL STANDARDS

Modified HDLC

X.25 Level 2

ERROR CONTROL

16 bit cyclical redundancy check

BUFFER CAPACITY

16,384 bytes

LINK TIMING

Internal from 1.2 Kbps to 19.2 Kbps, External to 64Kbps

APPROVAPPROV

APPROV

APPROVAPPROV

154001UA B-1

ALSALS

ALS

ALSALS

Model 3028 Turbo (2031T)

 MET, c-MET and CE

C. ASCII Character CodesC. ASCII Character Codes

C. ASCII Character Codes

C. ASCII Character CodesC. ASCII Character Codes

C. ASCII Character Codes

Decimal

Binary Hex Octal

Value

0 000 0000 00 000 NUL Null 1 000 0001 01 001 SOH Start of Header 2 000 0010 02 002 STX Start of Text 3 000 0011 03 003 ETX End of Text 4 000 0100 04 004 EOT End of Transmission 5 000 0101 05 005 ENQ Enquiry 6 000 0110 06 006 ACK Positive Acknowledge 7 000 0111 07 007 BEL Bell 8 000 1000 08 010 BS Back Space

9 000 1001 09 011 HT Horizontal Tab 10 000 1010 0A 012 LF Line Feed 11 000 1011 0B 013 VT Vertical Tab 12 000 1100 0C 014 FF Form Feed 13 000 1101 0D 015 CR Carriage Return 14 000 1110 0E 016 SO Shift Out 15 000 1111 0F 017 SI Shift In 16 001 0000 10 020 DLE Data Link Escape 17 001 0001 11 021 DC1 Device Control 1 18 001 0010 12 022 DC2 Device Control 2 19 001 0011 13 023 DC3 Device Control 3 20 001 0100 14 024 DC4 Device Control 4 21 001 0101 15 025 NAK Negative Acknowledge 22 001 0110 16 026 SYN Synchronous Idle 23 001 0111 17 027 ETB End of Transmission Block 24 001 1000 18 030 CAN Cancel 25 001 1001 19 031 EM End of Medium 26 001 1010 1A 032 SUB Substitute 27 001 1011 1B 033 ESC Escape 28 001 1100 1C 034 FS File Separator 29 001 1101 1D 035 GS Group Separator 30 001 1110 1E 036 RS Record Separator 31 001 1111 1F 037 US Unit Separator 32 010 0000 20 040 (space) 33 010 0001 21 041 ! 34 010 0010 22 042 " 35 010 0011 23 043 # 36 010 0100 24 044 $ 37 010 0101 25 045 % 38 010 0110 26 046 & 39 010 0111 27 047 ' 40 010 1000 28 050 ( 41 010 1001 29 051 ) 42 010 1010 2A 052 * 43 010 1011 2B 053 + 44 010 1100 2C 054 , 45 010 1101 2D 055 46 010 1110 2E 056 . 47 010 1111 2F 057 / 48 011 0000 30 060 0 49 011 0001 31 061 1 50 011 0010 32 062 2 51 011 0011 33 063 3 52 011 0100 34 064 4 53 011 0101 35 065 5 54 011 0110 36 066 6 55 011 0111 37 067 7 56 011 1000 38 070 8 57 011 1001 39 071 9 58 011 1010 3A 072 : 59 011 1011 3B 073 ; 60 011 1100 3C 074 < 61 011 1101 3D 075 = 62 011 1110 3E 076 > 63 011 1111 3F 077 ?

Mnemonic

Character

Description

Decimal

Binary Hex Octal

Value

64 100 0000 40 100 @ 65 100 0001 41 101 A 66 100 0010 42 102 B 67 100 0011 43 103 C 68 100 0100 44 104 D 69 100 0101 45 105 E 70 100 0110 46 106 F 71 100 0111 47 107 G 72 100 1000 48 110 H 73 100 1001 49 111 I 74 100 1010 4A 112 J 75 100 1011 4B 113 K 76 100 1100 4C 114 L 77 100 1101 4D 115 M 78 100 1110 4E 116 N 79 100 1111 4F 117 O 80 101 0000 50 120 P 81 101 0001 51 121 Q 82 101 0010 52 122 R 83 101 0011 53 123 S 84 101 0100 54 124 T 85 101 0101 55 125 U 86 101 0110 56 126 V 87 101 0111 57 127 W 88 101 1000 58 130 X 89 101 1001 59 131 Y 90 101 1010 5A 132 Z 91 101 1011 5B 133 [ 92 101 1100 5C 134 \ 93 101 1101 5D 135 ] 94 101 1110 5E 136 ^ 95 101 1111 5F 137 _ 96 110 0000 60 140 ` 97 110 0001 61 141 a 98 110 0010 62 142 b

99 110 0011 63 143 c 100 110 0100 64 144 d 101 110 0101 65 145 e 102 110 0110 66 146 f 103 110 0111 67 147 g 104 110 1000 68 150 h 105 110 1001 69 151 i 106 110 1010 6A 152 j 107 110 1011 6B 153 k 108 110 1100 6C 154 l 109 110 1101 6D 155 m 110 110 1110 6E 156 n 111 110 1111 6F 157 o 112 111 0000 70 160 p 113 111 0001 71 161 q 114 111 0010 72 162 r 115 111 0011 73 163 s 116 111 0100 74 164 t 117 111 0101 75 165 u 118 111 0110 76 166 v 119 111 0111 77 167 w 120 111 1000 78 170 x 121 111 1001 79 171 y 122 111 1010 7A 172 z 123 111 1011 7B 173 { 124 111 1100 7C 174 | 125 111 1101 7D 175 } 126 111 1110 7E 176 ~ 127 111 1111 7F 177 (delete)

Mnemonic Character

Description

154001UA C-1

D. Multiplexer Parity OptionsD. Multiplexer Parity Options

D. Multiplexer Parity Options

D. Multiplexer Parity OptionsD. Multiplexer Parity Options

The parity options supported by the multiplexer are: NONE/ODD, NONE/

EVEN, NONE/MARK, NONE/SPACE, ODD, EVEN. All of the options

starting "NONE/" make the multiplexer insensitive to parity. The parity is not

checked on incoming characters or appended to outgoing characters. Instead,

the stop bit immediately follows the last data bit. This does not mean that the

DTE equipment does not furnish or require parity, only that the multiplexer

transfers the parity bit transparently, treating it as another data bit. Even if the

multiplexer is transparent to parity, the correct parity setting must be known so

that the multiplexer-generated messages will be transmitted correctly. That is

the reason for the different options following "NONE/". The difference is what

is put in bit eight when messages are sent to the user (since only ASCII mes-

sages are supported the parity bit is assumed to be bit eight). The parity is

inserted by the software, but is subject to the data bits parameter in that if the

data bits are not set to eight, the eighth bit is not sent by the hardware.

D. Multiplexer Parity Options

ODD and EVEN parity settings make the multiplexer sensitive to parity. Parity

is checked on incoming characters, stripped for transmission, and then recalcu-

lated on outgoing characters. This parity is handled by the hardware, and is

always the next bit after the programmed number of data bits. System gener-

ated messages will always have a zero in the eight bit for either of these parity

options.

Table D-1 summarizes the proper setting for the parity and data bits param-

eters, based on whether parity transparency or sensitivity is required.

Table D-1. Multiplexer Parity and Data Bit Settings

TERMINAL SETTING

DATA BITS PARITY DATA BITS PARITY DATA BITS PARITY

7 ODD 8 NONE/ODD 7 ODD 7 EVEN 8 NONE/EVEN 7 EVEN 7 MARK 8 NONE/MARK 7 SPACE 8 NONE/SPACE 7 NONE 7 any NONE/ 8 ODD 8 ODD 8 EVEN 8 EVEN 8 MARK 8 SPACE 8 NONE 8 any NONE/

Grayed out blocks are not supported or not applicable

PARITY TRANSPARENCY PARITY SENSITIVITY

2031 Multipexer Setting

154001UA D-1

E. Hewlett-Packard ProtocolE. Hewlett-Packard Protocol

)

E. Hewlett-Packard Protocol

E. Hewlett-Packard ProtocolE. Hewlett-Packard Protocol

E. Hewlett-Packard Protocols

ENQ/ACKENQ/ACK

ENQ/ACK

ENQ/ACKENQ/ACK PROTOCOLPROTOCOL

PROTOCOL

PROTOCOLPROTOCOL

In the ENQ/ACK protocol, the host sends block of asynchronous data followed

by an ASCII ENQ character. Transmission of the next block is withheld until

the receiving end sends back the ASCII ACK signal. This signifies that the

receiving end has processed the data block and is ready to receive another. The

multiplexer is programmed during this option to issue ACKs itself, eliminating

the delay required for each ACK to separately propagate through the remote

connection. Up to five blocks can be acknowledged by the multiplexer at any

time. Simultaneously at the remote end, the multiplexer is watching for ACKs

and converting then to internal control codes to send to the local end. The

result is a 5 block window, allowing ENQ-blocks and ACKs to be overlapped,

making transmission more efficient. Both ends of the connection must be

configured HPENQ for this to work.

Figure E-1 gives a sequence chart of the protocol assistance.

(DB1)

(DB2 )

(DB5)

Local

3028

)

(

)

(

(5)

Unconfirmed

ACK s

(

)

Remote

Buffered

)

(

Remote

3028

(3)

(4)

(3)

(DB1)

(DB2 )

TerminalHPENQ

(

)

Ter minal

Processing

Time

( Ti)

(

)

(

2031E-1

NOTE:

Pari ty of A CK according to local s ystem option.

ENQ' DC X control code representing A S CII ENQ.

HP X-OFF stat e en t ered.

HP X-ON state entered.

5 Unconf i rmed ACK's, therefore no response t o CP U's ACK.

ACK' DCX control code representing ASCII ACK.

Parit

of ENQ according o remote system option.

Figure E-1. HPENQ Protocol Assistance

154001UA E-1

Tandem or

Non-Tandem

Peripheral

Tandem

CPU

20126

Special

Cable

RFC: DTR-/DTR+

EIA PROP: YES

FC: TANDEM

EIA PROP:YES

2031F- 1

3028

andem Tandem T

andem T

andem Tandem T

MethodsMethods

Methods

MethodsMethods

-Pause and W-Pause and W

-Pause and W

-Pause and W-Pause and W

Tandem T-Pause Flow Control .......................................................................................................... F-1

Wang Flow Control ............................................................................................................................. F-2

F. Tandem T-Pause and Wang Flow Control Methods

ang Flow Controlang Flow Control

ang Flow Control

ang Flow Controlang Flow Control

TANDEM TTANDEM T

TANDEM T

TANDEM TTANDEM T FLOW CONTROLFLOW CONTROL

FLOW CONTROL

FLOW CONTROLFLOW CONTROL

-PAUSE-PAUSE

-PAUSE

-PAUSE-PAUSE

T-Pause is a flow control method used in some Tandem minicomputer environ-

ments, basically a form of out-of-band flow control. A typical application is

depicted in Figure F-1. On the terminal end, the device signals to the multiplexer

that it is unable to receive more data by dropping DTR. The 3028 Turbo (CTS 2031

Turbo) multiplexer at the terminal end is thus set to a Reverse Flow Control (RFC)

option of DTR-/DTR+; no special crossover or tandem option is required.

At the host end, the Tandem computer looks for a rising Pin 12 to signal T-Pause

(XOFF), and a falling Pin 12 to mean Ready (XON). At this end there is a need for

both a special Tandem crossover cable and a Tandem option for the Flow Control

(FC) parameter to do the following:

 Invert the DTR signal propagated from the far end, since the

remote's falling DTR must be converted to the host's Rising Pin

12, and

 Output the far end's DTR input signal (inverted) on BOTH output

pins 5 and 6. This is done to accommodate existing T-Pause

cabling for various manufacturers. Customers without crossovers

may select either option in customer-supplied crossover.

Note that EIA propagation should be enabled at both ends for the Tandem option

to work properly.

154001UA F-1

Figure F-1. Tandem T-Pause Flow Control Example

3028 Turbo Statistical Multiplexer

When TA NDE M is selected a special custom er-supplied cable is required. Refer to the f o llow in sequences.

Fem a le

M u ltip lex er

2 3 4 5

6 7

8 20 22 25

Note

table fo r pin-out

M ale

2 3 4

8 20 22 25

Ta nd em

2031F-2

The Wang 2200 Flow Control and Reverse Flow Control options support a

special two-level in-band flow control mechanism characteristic of the Wang

2200 computer system. The Wang 2200 terminal may have a printer attached;

when it does, separate XON and XOFF reverse flow control characters are

generated by the CRT and the attached printer. These in turn are propagated

separately by the 2031 Turbo multiplexer as flow control characters to the host

end. The CRT issues an XOFF of FA hexadecimal and an XON of F8, while the

printer uses an XOFF of FB and an XON of F9.

To support this mechanism, the WANG option must be selected for the Reverse

Flow Control option at the terminal end; at the host end, select the WANG

option for Flow Control, NONE for Reverse Flow Control, and YES for the Flow

Control Translation parameter.

WANG FLOWWANG FLOW

WANG FLOW

WANG FLOWWANG FLOW

CONTROLCONTROL

CONTROL

CONTROLCONTROL

F-2 154001UA

G. Flow Control Translation

G.G.

Flow Control TFlow Control T

Flow Control T

Flow Control TFlow Control T

Normally, when a reverse flow control signal is received at one end of the

connection (typically the terminal end), an internal multiplexer control message

is sent to the other end to exert flow control upon the host. If both flow control

and flow control translation are set at the host end, then a channel converts a

reverse flow control internal message to the programmed flow control option.

For example, the terminal end multiplexer is configured for in-band flow

control and reverse flow control. The host end multiplexer is configured for

out-of-band flow control and reverse flow control and has flow control transla-

tion enabled. The terminal end multiplexer will stop transmission from the

terminal to the multiplexer using the in-band flow control (XOFF) character that

has been selected by the user. Transmission will be restarted using the specified

in-band (XON) character. Similarly, in this example, the terminal will stop and

start transmission from the multiplexer to the terminal using the specified in-

band reverse flow control (XOFF/XON) characters.

Upon receiving a reverse flow control (XOFF) character from the terminal, the

multiplexer will immediately suspend transmission to the terminal and send the

in-band reverse flow control character to the host end. The host end multi-

plexer will convert the in-band flow control XOFF character (initiated by the

terminal) to the specified out-of-band flow control signal for presentation to the

host. In this example, an ASCII XOFF character generated by the terminal will

cause the host end multiplexer to perform the appropriate out-of-band EIA

signaling to the host. It is important to remember that, in this example, the

translation takes place in the host end multiplexer (Figure G-1).

ranslationranslation

ranslation

ranslationranslation

CRT

154001UA G-1

XOFF

3028 Tu rbo

STATISTICAL

MU L TI P LE X E R

XOFF/XON CTS-/CTS+

Flow Control Translation

Figure G-1. Flow Control Translation

3028 Tu rbo

STATISTICAL

MU L TI P LE X E R

HOST

2031G- 1

CTS-

3028 Turbo Statistical Multiplexer

Table G-1 shows the action that takes place when flow control translation is

enabled.

Table G-1. Action When Flow Control Translation is Enabled

FLOW CONTROL (END B)

TANDEM, CTS-/CTS+,

DSR-/DSR+

1. Transparent data transmission including DC1, DC2, DC3, and DC4.

2. End B CTS and DSR follow End A DTR (if local CTS then End A RTS must be on).

1. End B CTS follows End A Reverse Flow Control State.

XON state.

REVERSE

FLOW

CONTROL

(END A)

NONE

RTS-/RTS+, DTR-/DTR+

DC3/DC1, DC2/DC1, DC4/DC2,

USER,WANG

NONE

1. Transparent data transmission including DC1, DC2, DC3, and DC4.

1. Reverse Flow Control characters are reconstructed at End B with parity as defined at End B.

DC3/DC1, DC2/DC1,

DC4/DC2, USER,WANG

1. Transparent data DC2, DC3, and DC4.

2. End A DTR signal is

is detected. DTR in the normal manner.

1. End A XON and XOFF into End B XON and XOFF

DC1 = ASCII code DC1

DC2 = ASCII code DC2

DC3 = ASCII code DC3

DC4 = ASCII code DC4

CTS = RS-232-C control Clear to Send

RTS = RS-232-C control Request to Send

DTR = RS-232-C control Data Terminal Ready

DSR = RS-232-C control Data Set Ready

G-2

154001UA

H. Factory Hardware Option Settings

H.H.

OVERVIEWOVERVIEW

OVERVIEW

OVERVIEWOVERVIEW

OPTIONOPTION

OPTION

OPTIONOPTION SELECTION ANDSELECTION AND

SELECTION AND

SELECTION ANDSELECTION AND CONFIGURACONFIGURA

CONFIGURA

CONFIGURACONFIGURA SYMBOLOGYSYMBOLOGY

SYMBOLOGY

SYMBOLOGYSYMBOLOGY

FactorFactor

Factor

FactorFactor

TIONTION

TION

TIONTION

y Hardware Option Settingsy Hardware Option Settings

y Hardware Option Settings

y Hardware Option Settingsy Hardware Option Settings

Overview .............................................................................................................................................. H-1

Option Selection and Configuration Symbology ............................................................................. H-1

Multiplexer Configuration ................................................................................................................. H-2

The internal configuration of the multiplexer and modem are done at the

factory. This appendix provides information to be used by service personnel for

internal configuration of the multiplexer.

NoteNote

Note

NoteNote

The settings described should only be changed by service personnel.

Patton printed circiut boards (PCBs or cards) that include optional circuit configu-

rations have built in strapping features.

In this manual, strap options for the card are described under separate headings

with numbered paragraphs for each strap function. Additionally, a strapping

instruction figure is provided for the card. Each figure contains the following

strapping aids:

 A nonscale drawing showing the relative location of each wire

strap and each miniature switch.

 A nonscale drawing of each miniature switch showing the

standard and mandatory setting for each switch segment.

 Tables summarizing the strapping, the standard setting and the

paragraph reference for each strap function.

The features set at the factory are implemented through miniature switches. The

miniature switch occupies a dual inline package (DIP) component location on the

card. The switch location can be referenced by the switch number silkscreened on

the PCB. Switch 1 (SW1) is currently not used on this version of the 2031 Turbo

and the switch segment positions make no difference.

Hardware (Berg) strapping is accomplished through the use of pins that protrude

from the PCB and can be connected by an insulated shorting bar. The arrange-

ments of the Berg straps are

2-Wire

Berg Strap

3-Wire

Berg Strap

AA outA in

A B A in B ou t A ou t B in

H-1. Berg Strapping Examples

154001UA H-1

Patton 3028 Turbo User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual