Patton 3022 User Manual

USER

Part# 07M3022-B
Doc# 068021UB
Revised 12/19/95

MANUAL

MODEL 3022

MicroStat II
Miniature Statistical
Multiplexer

SALES OFFICE
[phone]
TECHNICAL SUPPORT
[phone]

TABLE OF CONTENTS

1.0 Warranty Information.................................................................2

1.1 Radio and TV Interference

1.2 Service

2.0 General Information...................................................................3

2.1 Features

2.2 Description

3.0 Installation..................................................................................4

3.1 Connecting the Main Channel

3.2 Connecting the Sub-Channels

3.3 Connecting Two Model 3022s Back-to-Back

3.4 LED Status Indicator

3.5 Power Requirements

3.6 Flow Control Requirements

4.0 Operating Modes........................................................................9

4.1 Local Offline Command Mode

4.2 Online Data Mode

4.3 PassThru Mode

4.4 Local Online Command Mode

4.5 Remote Online Command Mode

5.0 Command Entry.......................................................................11

5.1 Rules for AT Command Entry

5.2 Result Codes

5.3 Complete AT Command Set

6.0 Tutorial ......................................................................................19

7.0 Troubleshooting.......................................................................23

Appendix A - Specifications

Appendix B - Sub-Channel Cables

1.0 WARRANTY INFORMATION

Patton Electronics warrants all Model 3022 components to be
free from defects, and will—at our option—repair or replace the product
should it fail within one year from the first date of shipment.

This warranty is limited to defects in workmanship or materials, and
does not cover customer damage, abuse, or unauthorized modification.
If this product fails or does not perform as warranted, your sole
recourse shall be repair or replacement as described above. Under no
condition shall Patton Electronics be liable for any damages incurred
by the use of this product. These damages include, but are not limited
to, the following: lost profits, lost savings, and incidental or
consequential damages arising from the use of or inability to use this
product. Patton Electronics specifically disclaims all other warranties,
expressed or implied, and the installation or use of this product shall be
deemed an acceptance of these terms by the user.

1.1 RADIO AND TV INTERFERENCE

The Model 3022 generates and uses 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 Model 3022 has been tested and found to
comply with the limits for a Class A computing device 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 Model 3022
does cause interference to radio or television reception, which can be
determined by disconnecting the RS-232 interface, 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).

1.2 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 Service at [phone].

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
Model 3022. Technical Service hours: 8AM to 5PM EST, Monday

through Friday.

1

2

2.0 GENERAL INFORMATION

Description Direction

1 Protective Ground N/A
2 Transmit Data From Model 3022
3 Receive Data To Model 3022
4 Request to Send From Model 3022
5 Clear to Send To Model 3022
6 Data Set Ready To Model 3022
7 Signal Ground (common return) N/A
8 Carrier Detect To Model 3022

9 9 to 12 Volt Power (optional) To Model 3022
20 Data Terminal Ready From Model 3022
22 Ring Indicator To Model 3022

If your application requires an RS-232 cable between the Model

3022 and the modem, it must be a

straight-through cable

(pinned 1-1,

2-2, 3–3, etc.) of the

shortest

possible length.

3 4

3.0 INSTALLATION

Thank you for purchasing this Patton Electronics product. It has
been designed, manufactured and tested to give you years of trouble­free service. If any questions or problems arise during use, please do
not hesitate to call Patton Technical Support at [phone].

2.1 FEATURES

• Multiplexes two RS-232 devices into one RS-232 modem link

• Asynchronous sub-channel rates: 110, 300, 1200, 2400, 9600,
19,200 and 38,400 bps

• Asynchronous main channel rates: 1200, 2400, 9600,
19,200 and 38,400 bps and auto detect

• Interface powered–no AC power or batteries required

• Miniature design–plugs directly into DB-25 modem port

• Modular RJ-45 sub-channel ports 1 & 2

• Convenient configuration using extended AT command set

• Configure local and remote units from either local port 1 or 2

• Supports both XON/XOFF and RTS/CTS flow control

2.2 DESCRIPTION

The Patton Model 3022 MicroStatII is a miniature statistical

multiplexer that lets one asynchronous modem communicate with two
asynchronous serial devices
up to 38.4 Kbps, the Model 3022 uses specialized circuitry to monitor
and prioritize data flow. The Model 3022 can be configured so that
upon startup it automatically senses the data rate of the device
connected to either sub-channel. It can also be configured to go into
Data Mode when the modem raises CD. For added convenience, the
Model 3022 allows both local and remote multiplexers to be configured
from local port 1 or 2.

The Model 3022 supports both hardware (RTS/CTS) and software
(X-ON/X-OFF) flow control. Connecting directly to the modem’s DB-25
port, the Model 3022 derives power from the RS-232 interface and
requires no AC power or batteries for operation. Async input devices
connect to the Model 3022 using dual RJ-45 modular interface jacks.
The Model 3022 is housed in a sturdy ABS plastic case measuring

2.66"w x 2.10"l x 0.73"h.

at the same time

. Operating at data rates

The Model 3022 is typically installed by connecting the main
channel to an asynchronous modem and the sub-channels to two
asynchronous serial devices. However, two Model 3022s may also be
connected back-to-back. This section describes connection
procedures, as well as LED indicator function, power requirements,
and flow control requirements.

3.1 CONNECTING THE MAIN CHANNEL

To use both channels of your Model 3022, you must be linked to
another Model 3022, which is usually located remotely and
interconnected with a pair of modems. On one end of the Model 3022,
you will find the asynchronous RS-232 Modem interface. This is a
DB-25 male connector, which plugs directly into the DB-25 female
connector on your modem. The following table lists the pin
connections on the Model 3022's modem interface:

Pin#

3.2 CONNECTING THE SUB-CHANNELS

Figure 1. EIA/TIA-561 Interface pinouts for Model 3022 RJ-45 jacks (ports 1 & 2).

1 (DSR) from 3022
2 (CD) from 3022
3 (DTR) to 3022
4 (SG)
5 (RX Data) from 3022
6 (TX Data) to 3022
7 (CTS) from 3022
8 (RTS) to 3022

1
2
3
4
5
6
7
8

PC/AT™ to Model 3022 Pin-Outs:

The two asynchronous, serial sub-channels of the Model 3022 are
RJ-45 female ports that conform to the EIA/TIA-561 interface (see
Figure 1, below). These ports connect to the two serial devices that will
be multiplexed through the main RS-232 port of the Model 3022. Any
combination of RS-232 devices may be connected to the Model 3022's
sub-channels: PCs, terminals, printers, laptops, Macs, plotters, etc.

Every serial device connected to channels 1 and 2 must have a
special interface cable. On one end, this interface cable must have an
RJ-45 male plug; on the other end, it must have a connector that fits
into your RS-232 serial device. The diagrams below and on the
following page show pin connections between the Model 3022's sub­channels and common RS-232 serial interfaces. You may use these
diagrams to construct your own cables, or you may purchase pre-made
cables from Patton Electronics. See Appendix B for Patton cable part
numbers.

PC/XT™ or Serial Printer to Model 3022 Pin-Outs:

Serial DB-25 Model 3022 RJ-45

Pin No. Pin No.

6 (DSR) ------------------------------------- 1
8 (CD) --------------------------------------- 2
20 (DTR)------------------------------------ 3
7 (SG) --------------------------------------- 4
3 (RX Data) -------------------------------- 5
2 (TX Data)--------------------------------- 6
5 (CTS)-------------------------------------- 7
4 (RTS)-------------------------------------- 8

Serial DB-9 Model 3022 RJ-45

Pin No. Pin No.

6 (DSR) ------------------------------------- 1
1 (CD) --------------------------------------- 2
4 (DTR) ------------------------------------- 3
5 (SG) --------------------------------------- 4
2 (RCV Data)------------------------------ 5
3 (TX Data)--------------------------------- 6
8 (CTS)-------------------------------------- 7
7 (RTS)-------------------------------------- 8

3.3 CONNECTING TWO MODEL 3022s BACK-TO-BACK

You may connect two Model 3022s back-to-back, bypassing the
modems. To do this, you must have two Patton Model 3P–MF power
supply adapters (see Section 3.5), and one DB-25 female-female RS­232 cable. The cable should be no longer than 100 feet (shorter in
some cases), and wired as a "null modem" or "crossover". The
following table shows how to pin a null modem cable that will connect
two Model 3022s back-to-back:

DB-25 Female DB-25 Female
Pin No. Circuit Circuit Pin No.

1 AA -----------------------------------AA 1
2 BA -----------------------------------BB 3
3 BB -----------------------------------BA 2
4 CA -----------------------------------CB 5

5 CB -----------------------------------CA 4
6 CC ----------------------------------CD 20
7 AB -----------------------------------AB 7
9 Pwr ----------------------------------Pwr 9

20 CD ----------------------------------CC 6

Connect the Model 3P-MF adapters to the Model 3022 DB-25
ports. Then connect the null modem cable between the adapters. Do
not plug the adapters into their respective AC outlets until the serial
device connections have been made to the Model 3022s.

(continued)

5 6

3.4 LED STATUS INDICATOR

flow

control (flow control between the device and the sub-channel port). In

all

cases, the flow control setting of each Model 3022 port must match

the flow control setting of the device connected to that port.

4.0 OPERATING MODES

This section gives descriptions of the five operating modes used by
the Model 3022. When reading these descriptions it may be helpful to
refer to the Navigation Chart shown in Figure 4 (below).

7 8

Figure 2. Model 3022 rear view showing LED indicator

Figure 3. Model 3022 flow control requirements.

Device A

Device B

Model

3022

Modem

Local Flow

Control

Local Flow

Control

Composite Flow

Control

Power Up

Local Offline

Command Mode

Online

Data Mode

Remote Online

Command Mode

Local Online

Command Mode

PassThru

Mode

“\\\”

AT[Y0

(hangup) AT[H

“\\\”

AT[O

AT[D1AT[D0

AT@

(send commands to
remote Model 3022)

Figure 4. Navigation Chart for the Model 3022 Operating Modes

Where you see the above arro w y ou ha ve three
methods of going to Online Data Mode: 1) by letting
the kill timer ( AT[Kn) expire; 2) by the local modem
raising CD (AT[Xn, where n=1); 3) by keying AT[O to
go directly into Online Data Mode.

The Model 3022 has one LED indicator, which is located at the rear
of the unit, between the two modular jacks (see Figure 2, below). This
LED glows to show that the local and remote Model 3022s are in Data
Mode, and are synchronized with each other.

Port 1

3.5 POWER REQUIREMENTS

LED Indicator

Port 2

The Model 3022 derives all necessary operating power from the
DB-25 interface, and requires no AC power or batteries for operation.
When the DCE device is turned on, the Model 3022 automatically
“powers up”. Note: If you do not use a modem (as in Section 3.3), or
your modem is interface powered, you will need to obtain a Patton
Model 3P-MF power supply adapter. This adapter plugs into a standard
AC wall outlet and supplies 100 milliwatts to pins 7 and 9 of the DB-25
interface.

3.6 FLOW CONTROL REQUIREMENTS

For each of the Model 3022 port connections, flow control may be
set for X-ON/X-OFF (software), RTS/CTS (hardware), both methods or
no flow control (see Figure 3, below). For

most

applications, the serial

devices connected to sub-channels 1 and 2 must support local