Westermo TD-22 AC Manuale utente

PTT Modem

INSTALLATION MANUAL

6177-2203

www.westermo.se

TD-22 AC

TD-22 DC

©Westermo Teleindustri AB • 1998 • REV A

Galvanic

Isolation Transient

Protection CE

Approved

36177-2203

TABLE OF CONTENTS

INTRODUCTION ................................................................................................................................................ 4

SAFETY ................................................................................................................................................................................... 4

SPECIFICATIONS .................................................................................................................................................. 5

INSTALLATION ....................................................................................................................................................... 5

RS-232 CONNECTIONS ........................................................................................................................... 6

LINE CONNECTIONS .................................................................................................................................. 6

TYPICAL TD-22 LINE CONNECTIONS .......................................................................... 7

DIP SWITCH SETUP ............................................................................................................................ 8–10

LED STATUS INDICATORS ............................................................................................................ 11

DTE COMMAND LINES ........................................................................................................................ 12

AT COMMAND SET ....................................................................................................................... 13–32

RESULT CODES .................................................................................................................................................. 33

S-REGISTERS ................................................................................................................................................. 34–42

BLOCK DIAGRAM .......................................................................................................................................... 42

APPLICATION EXAMPLES .................................................................................................... 43–46

GLOSSARY ...................................................................................................................................................... 47–50

46177-2203

Introduction

The Westermo TD-22 is an industrialised dial and leased line modem. This modem has been

developed to be used in industrial applications and has some features you would not expect to find on

a normal modem.

Terminal data rates of up to 19.2 kbit/sec can be handled using data compression and error

correction. Direct mode connections with the maximum line modulation speed of 2,400 bit/sec can

be made.

Lease line 2 and 4 wire connections can be made as well as multidrop half duplex V.23 connections.

The modem can also be used on ordinary twisted pair cables to provide long distance asynchronous

communications.

A watchdog facility continually monitors the power supply and internal hardware as well as the

operational software. In the event of a problem the modem automatically resets. This feature has

been included to make the unit more suitable for use in unmanned locations.

The TD-22 is available in two standard versions for power supply by 230VAC or 12-36VDC. Special

115VAC and 36-55VDC models are also available on request.

Westermo have implemented commands often left out of standard modems like &D to allow

hardware controlled dial out on receipt of a hardware signal and &A to prevent aborts on connection

when extra characters are received.

The TD-22 can handle 11 data bits and has a special 2 stop bit mode to allow the unit to be used in

applications many modems can’t handle.

The TD-22 has been designed with the engineer in mind, hence the extensive information on the

command set, S registers, DIP switched and error codes. We have endeavoured to include all

necessary information however if you need more please do not hesitate to call us.

Safety

This equipment should only be installed by professional service personnel. If the unit is intended for

permanent connection to mains supply, there should be a readily accessible

disconnect device (circuit breaker) incorporated into the fixed wiring.

All ports on this equipment are designed for connection to TNV circuits.

The mains connection is classified as excessive voltage

Description of the above classifications are given in EN60950:1992.

56177-2203

Specifications

Installation

The modem should be

connected in the following

way:

Power connection is made

through screw-block at bottom

right corner.

For 115V AC or 230V AC it is

a 3-pole connector, and for 12-

36 or 36-55V DC a 2-pole

connector

Computers or other equipment

are connected through an

RS-232 connection .

This connection can be made

either to the 25-pole D-sub or

the 9-pole screw connector.

Do not use ribbon cable for

RS-232 connections.

Modulation CCITT V.22bis, 2400 bit/s

CCITT V.22, Bell 212A, 1200 bit/s

CCITT V.21, Bell 103, 300 bit/s

CCITT V.23, 1200/75 bit/s & 1200 Hdx

Dial up Tone signals DTMF

Settings AT-commands & switches

Transmission Asynchronous & Synchronous

Transmission speed, DTE 300, 600, 1200, 2400, 9600, 19200 bit/s

Compression V.42bis & MNP5 (Not leased Line)

Characters up to 11 bits

Error correction V.42, MNP 2-4 & MNP 10 (Not leased line)

Interface EIA RS-232-C/V.24/V.28

Line interface RJ12 or 4-pole screw connector

Line 2-wire for dial up connections

2- or 4-wire for leased line connections

REN, Ringer Equivalence Number 1

Power 230 VAC -10% +15%, 48-62 Hz (TD-22 AC)

12-36 VDC (TD-22 DC)

115 VAC or 36-60 VDC can be delivered as optional

Power consumption 25 mA at 230 VAC

200 mA at 12 VDC

Isolation Between line, RS-232 connection and power 1500V.

Temperature/humidity 5-50°C surrounding temperature

0-95% RH, without condensation

Extended temperature can be delivered as an option

0-95% RH, without condensation Extended temperature can be delivered as an option

Size, mm (W*H*D) 55 * 100 * 128

Weight, kg 0.6 (TD-22 AC) & 0.4 (TD-22 DC)

Indications PWR, LINE, ANS, REL, TD, RD, RTS, DCD, DTR & DSR

Light emitting

diodes

Screw-block

for RS-232

connection

25-pole D-sub

for RS-232

connection

PWR

connection

Line connection

RJ-12

Line connection

screw block

▼▼▼

▼

▼▼

25 Pin Screw Direction Name Description

D-sub Terminal DCE-DTE

1 - - - PE Protective earth

2 8 TXD Transmit data

3 7 RXD Receive data

4 6 RTS Request to send

5 5 CTS Clear to send

6 2 DSR Modem ready

7 1 - - - SG Signal ground

8 4 DCD Data carrier detect

9 Continuous high

10 Continuous low

12 DRS Speed indication (1200/2400)

15 TXC Synchronous TXD clock from modem

17 RXC Synchronous RXD clock from modem

20 3 DTR Data terminal ready

21 RDL Request of remote digital loopback

22 9 RI Ring indicator

23 DRS Data speed select (1200/2400)

24 EXC External synchronous clock

25 TI Test indication signal

66177-2203

RS-232 Connections

Pin outs for the 25-pole D-sub and 9-pole screw terminal:

The other pins in the 25-pole D-sub should be left unconnected.

Line connection

The telephone line is connected to the 6-pole RJ-12

connector or to the 4-pole screw block in the bottom

left side.

When using the screw-block a strap plug supplied must

be placed in the RJ-12 connector. If this is not done the

outgoing signal will not be connected to the screw-

block.

←

1 2 3 4

2-wire lines are connected to the two middle pins

(3 & 4) in the RJ-12 plug or the TX screws

(1 & 2).

In the UK modems the RJ-12 connection is on pin

2 & 5.

4-wire lines are connected to the screw terminal,

transmitter to TX (1 & 2) and receiver to RX (3 & 4).

76177-2203

Typical TD-22 line connections

4-position

screw-terminal

Handshaking

Leased line 2-wire

Telephone

exchange Telephone

exchange

Dial up line 2-wire

Telephone modem

4-position

screw-terminal

4-position

screw-terminal

RJ-12 connector

Leased line 4-wire

Telephone

exchange Telephone

exchange

Dial up line 2-wire

Telephone modem

1234567

The TD-22 is delivered with a factory setting for ”hardware hand-

shake” with RTS-CTS which means that if only TX, RX and GND

are connected no data will be sent on the receiving modem’s RS-232

connection unless RTS is high. The problem can be solved by placing

a jumper between RTS (screw terminal no 6) and for example DSR

(screw terminal no 2) or by disabling the handshake with the command

AT&K0.

86177-2203

DIP Switch Setup

Disconnect power before changing DIP-switches.

Take ESD-protection when changing switches.

The DIP-switches can be used to provide the following settings.

The DIP-switches are underneath the top lid of the modem. (1 = On, 0 = Off)

Non defined switches will be in off position.

SW1:

4321

0 Dial-up line

1 0 Leased line, switch off echo and result code. Answering

1 1 Leased line, switch off echo and result code. Dialling.

1 All commands ignored, including +++

SW2:

8765 4321

0 SW2:2 to 7 not used

1 For use of SW2:2 to 7

Choice of clock: Clock source:

0 0 Asynchronous

0 1 Synchronous Ext. Clock from D-sub pin 24

1 0 Synchronous Int. The modem creates clock

1 1 Synchronous slave Clock from line

1 DTR/DSR disconnected (AT&S0&D0&C0)

1V.25 commands enabled

1Remote configuration enabled

1Callback security enabled

8765 4321

0 4-wire line connection

1 2-wire line connection

1 REL-mode disconnected

SW3:

96177-2203

SW4:

87654321Select speed and parity towards

computer/terminal

0 0 0 0 Automatic speed and format setting up

0 0 0 1 300 Baud

0 0 1 0 600 Baud

0 0 1 1 1200 Baud

0 1 0 0 2400 Baud

0 1 0 1 4800 Baud

0 1 1 0 9600 Baud

0 1 1 1 19200 Baud

0 0 0 7,N

0 0 1 7,E

0 1 0 7,O

0 1 1 8,N

1 0 0 8,E

1 0 1 8,O

1 1 0 8,O* Sets direct-mode AT&Q0

(Used for 8 bits, optional parity)

1 1 1 8,N* Sets direct-mode AT&Q0

(Used for 7 bits, optional parity)

1 2-stop bits

*) The modem use this format when sending information to the DTE only in command mode.

10 6177-2203

8765321Select Line Modulation

0 0 0 Use saved parameters

0 0 1 V.21 300 bps (0-300) ATF1

0 1 0 V.23 Hdx ATF3 %F3

0 1 1 V.23 1200/75 bps ATF3

1 0 0 V.22 1200 bps ATF4

1 0 1 V.22 bis 2400 bps ATF5

1 1 1 Auto-detect mode ATF0

SW5:

116177-2203

LED Status Indicators

PWR: Full Intensity The modem is functioning normally

Half intensity The modem is in test mode or remote

configuration mode

Occasional flashing with speaker click Power supply problem

1:6, on:off ratio RAM error

On/off with speaker click Modem unable to start

LINE LED lights up when the modem has the line

ANS LED flashes when a ring is detected on the line. The ANS indicator shines constantly

when answering an incoming call and remains lit thereafter to indicate the modem is

in autoanswer mode.

REL When the modem is in error correcting and compressing mode this LED is on.When

the modem is in direct or normal mode this LED remains off.

TD Transmitted Data: Shows data received from the local RS-232 port

RD Received Data: Shows data leaving the modem on the RS-232 port

RTS Request to Send signal from the DTE

DCD Data Carrier Detect modem signal

DSR Data Set Ready modem signal

Please also refer to AT&C, AT\N, AT&T, ATS0

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