Patton electronics 3040/V35 Installation And Operation Manual

B

DIGITAL BRIDGE

Doc #: 139001UA

Part #: 07M3040-A

3040/V35

(CTS MD-V.35/TCB)

INSTALLATION AND OPERATIONS MANUAL

June 10, 1997

An ISO-9001

Certified Company

Copyright© 2000 Patton Electronics Co., All Rights Reserved

3040/V35

INSTALLATION AND OPERATIONS MANUALPATTON ELECTRONICS CO.

139001UA

COPYRIGHT NOTICE

Copyright© 2000 Patton Electronics Co., All Rights Reserved.

PROPRIETARY NOTICE

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.

SERVICE

All warranty and non-warranty repairs must be returned freight prepaid and insured to Patton
Electronics. All returns must have a Return Materials Authorization number on the outside of
the shipping container. This number may be obtained from Patton Electronics Technical
Services at:

tel: [phone];
email: [e-mail];
or, www: 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 MSDs. Technical Service hours: 8AM to 5PM
EST, Monday through Friday.

PUBLICATION NOTICE

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liability for losses incurred as a result of out-of-date or incorrect information contained in this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.

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PATTON ELECTRONICS CO. INSTALLATION AND OPERATIONS MANUAL

139001UA

3040/V35

EMISSION REQUIREMENTS

RADIO AND TV INTERFERENCE

The Patton devices 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 devices 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 reasonable 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 devices 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).

CANADIAN EMISSIONS

This digital apparatus does not exceed the Class A limits for noise emmissions from a digital
apparatus set out in the Radio Interference Regulations of the Canadian Department of
Communications.

Le present appareil numerique n’emet pas de bruits redioelectriques depassant les limites
applicables aux appareils numeriques de la Class A prescites dans le Reglement sur le
brouillage redioelectrique edicte par le ministere des Communications du Canada.

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3040/V35

INSTALLATION AND OPERATIONS MANUALPATTON ELECTRONICS CO.

139001UA

Contents

CHAPTER 1 - OPERATION

Channel Clocking...............................................................................................................................1-1

Fallback Clocking...............................................................................................................................1-1

Channel Interface...............................................................................................................................1-1

Anti-streaming....................................................................................................................................1-2

Channel Selection Modes..................................................................................................................1-2

Channel Tail Circuits .........................................................................................................................1-3

Interface Connections........................................................................................................................1-4

Front Panel LEDs ..............................................................................................................................1-4

Channel Enable / Disable Switches ..................................................................................................1-4

Power Supply.....................................................................................................................................1-4

CHAPTER 2 - SETUP AND INSTALLATION

Power Connection ............................................................................................................................. 2-1

Factory Configuration Switch Settings ..............................................................................................2-1

Disassembly...................................................................................................................................... 2-2

Installation .......................................................................................................................................... 2-2

Equipment Grounding (SW15-1)....................................................................................................... 2-3

RTS To CTS Delay (SW16-1,2,3)..................................................................................................... 2-3

Anti-Streaming (SW18-1,2,3) ............................................................................................................ 2-3

Receive Data Mode (SW18-7) .......................................................................................................... 2-3

Control Turn-Off Delay in “DATA” Switching Mode (SW15-3,4) ....................................................... 2-4

Switch on Data / Control (SW17-5,6,7,8).......................................................................................... 2-4

Internal Baud Rates (SW15-5,6,7,8) ................................................................................................. 2-4

Fallback Clock Enable (SW16-7) ...................................................................................................... 2-5

Fallback Clocking From Sub-Channel 4 (SW16-8)........................................................................... 2-5

Fallback Mode Selection (SW16-6)................................................................................................... 2-5

TX Clock Source Selection (SW17-1,2,3).........................................................................................2-6

TX Clock Pin Selection (SW17-4) ..................................................................................................... 2-6

RX Clock Source Selection (SW18-4,5,6) ........................................................................................ 2-6

Tail Circuit Buffers (SW16-4) ............................................................................................................2-7

Port DCE/DTE Selection (SW5 thru SW14) ..................................................................................... 2-7

DTR / DSR Forced Active (JP8 thru JP12).......................................................................................2-8

FACTORY Test Jumpers (JP1, JP2 and JP3)..................................................................................2-8

APPENDIX

Typical Application ..............................................................................................................A-1

Typical Tail Circuit Configuration ......................................................................................... A-1

Interface Pins Supported .....................................................................................................A-2

Master DTE / Sub-Channel DTE Interface Flow Diagram ....................................................A-3

Master DTE / Sub-Channel DCE Interface Flow Diagram....................................................A-3

Master DCE / Sub-Channel DCE Interface Flow Diagram...................................................A-4

Master DCE / Sub-Channel DTE Interface Flow Diagram....................................................A-4

TECHNICAL SPECIFICATIONS..........................................................................................A-5

Strapping Guide ..................................................................................................................A-6

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PATTON ELECTRONICS CO.

3040/V35

INSTALLATION AND OPERATIONS MANUAL

139001UA

CHAPTER 1 - OPERATION

The Patton 3040/V35 (CTS MD-V.35/TCB) is a network enhancement accessory intended for
high speed synchronous or asynchronous V.35 modem, DSU/CSU, or port sharing
applications. The 3040/V35 (CTS MD-V.35/TCB) allows for immediate expansion of a
system without the requirement of additional communication lines. The 3040/V35 (CTS MD­V.35/TCB) allows any combination of up to four V.35 DCE or DTE devices to share a single
V.35 DCE or DTE high speed link in a point-to-point or multi-point polled network.

Channel Clocking

The 3040/V35 (CTS MD-V.35/TCB) is protocol transparent and operates in synchronous and
asynchronous environments at data rates up to 2.048Mbps, depending on cable length and
attached equipment. Clocking can be derived from the Master Port clock, (pins Y,AA for TT or
U,W for ETT and V,X for RT), the internal clock generator or any Sub-Channel clock, (pins
Y,AA for TT or U,W for ETT and V,X for RT).

Fallback Clocking

In the event of loss of an externally provided clock or optionally Sub-Channel 1 DCD becoming
inactive, the 3040/V35 (CTS MD-V.35/TCB) has the ability to automatically fall back to the
predetermined internal baud rate clock or the Sub-Channel 4 RX Clock (pins V,X).

Channel Interface

The 3040/V35 (CTS MD-V.35/TCB) has five V.35 (MR-34) female connectors located on the
rear of the unit. Also a DB-25 connector is provided in parallel with the Master Port V.35
connector. Each port is DCE/DTE selectable, which eliminates the need for crossover cables.
DSR or DTR can additionally be forced to the active state individually on each Sub-Channel by
Jumper control.

PW SD RD 1 2 3 4 1 2 3 4

FB

ACTIVE

SUB-CHANNEL STATUS

STREAM

1-1

3040/ V35

ENABLE/DISABLE

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OPERATION

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Anti-streaming

PATTON ELECTRONICS CO.

3040/V35

INSTALLATION AND OPERATIONS MANUAL

A typical problem often encountered is a “

STREAMING

” remote terminal. The streaming
problem can tie up an entire circuit until the offending device has recovered or is powered
down. A streaming condition occurs when a Sub-Channel remains active, disrupting the
polling sequence. The 3040/V35 (CTS MD-V.35/TCB) provides two user selectable modes of
controlling a streaming condition, an automatic anti-streaming Abort Timer with eight
selectable block lengths and a setting to disable anti-streaming for large data block transfers,
and a manual Operator Control mode (front panel push button switch).

Automatic Anti-streaming

- Automatic Anti-Streaming will block the asserted control signal
from the Sub-Channel Port, releasing the 3040/V35 (CTS MD-V.35/TCB) to accept requests
from any other Sub-Channel that has not been locked out due to a streaming condition. When
a Sub-Channel is locked out for streaming, a visual indication, by Sub-Channel, is provided on
the front panel.

Any data sent to the Master Port by the streaming device will be lost

The Sub-Channel will no longer receive data or CTS from the Master Port.

. Once a Sub-Channel is
locked out due to streaming, the Sub-Channel will remain locked out until the attached device
removes the streaming condition. If RTS is held active, RTS must become inactive, if
continuous data transitions have triggered the Anti-Stream logic, the transitions must stop
before the 3040/V35 (CTS MD-V.35/TCB) will clear the Anti-Stream logic to that Sub-Channel.
Removing the Sub-Channel via the front panel disable switch will not clear the Anti-stream
logic for a Sub-Channel once it has been activated.

Manual Anti-Streaming

- If manual Anti-Stream protection is chosen, a streaming condition
caused by one of the attached terminals can be quickly corrected by the 3040/V35 (CTS MD­V.35/TCB) via the associated front panel locking switches. A switch is provided for each Sub­Channel and permits the rapid removal of a streaming terminal without having to disconnect
any cables or power down the offending terminal. Terminals may be selectively removed for
self-test and maintenance without affecting the remaining Sub-Channels. Once the streaming
condition has been corrected, the front panel switch is simply depressed to the locked
(Enable) position (Green indicator ON) to re-establish normal operation. Removing a Sub­Channel with the front panel switch will block data from the Sub-Channel going to the Master
Port but will not block data going from the Master Port to the Sub-Channel as the Automatic
Anti-Stream option did.

Channel Selection Modes

The 3040/V35 (CTS MD-V.35/TCB) provides two selectable Sub-Channel service modes of
operation, the Scanning Mode and Priority Mode. Depending on system requirements, either
mode may be selected by internal DIP switch settings. Both modes switch on activity from the
Sub-Channel.

OPERATION

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PATTON ELECTRONICS CO.

3040/V35

INSTALLATION AND OPERATIONS MANUAL

139001UA

In the Scanning Mode the CTS 3040/V35 (CTS MD-V.35/TCB) scans each Sub-Channel, in
sequence, beginning with Sub-Channel 1. This rotational sequence is repeated continually
with each attached Sub-Channel having equal access to the communications link. When data
or control lines from a Sub-Channel become active that Sub-Channel is switched through to
the master port by the 3040/V35 (CTS MD-V.35/TCB). All remaining Sub-Channels are
locked out until the first device becomes inactive. When the Sub-Channel device becomes
inactive, the 3040/V35 (CTS MD-V.35/TCB) will resume scanning the Sub-Channels for
another active signal.

When configured for Priority Mode operation, the 3040/V35 (CTS MD-V.35/TCB) monitors all
Sub-Channels simultaneously with Sub-Channel 1 having the highest priority. When a Sub­Channel becomes inactive, the 3040/V35 (CTS MD-V.35/TCB) will automatically default to the
highest priority (lowest number) Sub-Channel with activity.

Contention for the Master port is accomplished by asserting RTS (Request to Send) if the
Sub-Port is configured as a DCE, DCD (Data Carrier Detect) if the Sub-Port is configured as
a DTE or Data Transitions from the attached Sub-Channel devices in either configuration. The
active interface lead, RTS or DCD, as well as selection of contention mode,
or

“Interface Lead”

activation, can be selected on an individual basis for each Sub-Channel.

“Data Transitions”

Once a Sub-Channel asserts an active control signal the control signal will be passed through
to the Master Port, depending on DTE / DCE configuration of the Sub-Channel and Master
Port. This control will be passed without delays. If the Master Port is configured as a DTE the
signal will be passed as RTS. The CTS returned to the Master will have an optional delay
added before the signal is returned to the Sub-Channel port.

Port Enable / Disable, front panel switches must be pushed in (GREEN indication) for a Sub­Channel to access the Master Port regardless of the mode of operation selected.

Channel Tail Circuits

A buffer is built into the unit for tail circuit (DCE to DCE) applications. An 8 bit centered ring
buffer is used to correct the clock phasing errors generated between the Modem on the
Master Port and the Sub-Channel port for the data transferred from the Sub-Channel to the
Master Port. If the unit is operated in an asynchronous environment the buffer must be
bypassed. This is accomplished by moving the SYNC/ASYNC switch to ASYNC.

1-3

OPERATION