Westermo TD-32/485 User manual

Tele modem
V.32bis
INSTALLATION MANUAL
6178-2203
www.w st rmo.s
TD-32/485
TD-32
©Westermo Teleindustri AB • 2000 • REV. A
Galvanic
Isolation
Transient
Protection
CE
Approved

36178-2203
Tabl of Cont nts
Introduction ..................................................................................................................................................................... 4
Safety .......................................................................................................................................................................................... 4
Specifications .................................................................................................................................................................. 5
Installation .......................................................................................................................................................................... 6
RS-232/V.24 Connections ........................................................................................................................... 7
Line Connection ........................................................................................................................................................ 7
Typical TD-32 Line Connections ..................................................................................................... 8
TD-32/485 (RS-422/485 interface) ................................................................................................ 9
DIP Switch Setup .................................................................................................................................... 10–13
LED Status Indicators ................................................................................................................................... 13
DTE Command Lines .................................................................................................................................... 14
AT Command Set.................................................................................................................................... 15–34
Result Codes .............................................................................................................................................................. 35
S-Registers ......................................................................................................................................................... 36–45
Application Examples ...................................................................................................................... 46–49
Glossary ................................................................................................................................................................ 50–53

46178-2203
Introduction
The Westermo TD-32 is an industrialised dial and leased line modem. This modem has been devel-
oped 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 57. kbit/sec can be handled using data compression and error correc-
tion. The maximum line modulation speed is 14,400 bit/sec (V.32bis).
Leased line connections can be made on 2 or 4 wires. The modem can also be used on ordinary twist-
ed pair cables to provide long distance asynchronous communications.
A watchdog facility continually monitors the power supply and internal hardware as well as the oper-
ational 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-32 is available in two standard versions for power supply by 230V AC or 12–3 VDC.
Special 115V AC and 3 – 0V DC models are also available on request.
Westermo have implemented commands often left out of standard modems. Two examples of these
Westermo specific AT-commands are &D and &A (see AT-command description for further informa-
tion).
The TD-32 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-32 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.
Saf ty
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.
Line connections 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.
The TD-32D shall only be installed to a power supply of the type SELV.

56178-2203
Sp cifications
Modulation CCITT V.32bis, 4 800 till 14 400 bit/s
CCITT V.32, 4 800/9 600 bit/s
CCITT V.22bis, 2 400 bit/s
CCITT V.22, Bell 212A, 1200 bit/s
CCITT V.21, Bell 103, 300 bit/s
Dial up Tone signals DTMF
S ttings AT-commands & switches
Transmission Asynchronous & Synchronous
Transmission sp d, DET 300, 600, 1 200, 2 400, 9 600, 19 200, 38 400 & 57 600 bit/s
Compr ssion V.42bis & MNP5
Charact rs Up to 11 bitar
Error corr ction V.42, MNP 2-4 & MNP 10
Int rfac EIA RS-232-C/V.24. RS-422/485 is an option
Lin int rfac RJ12 or 4-pole screw connector
Lin 2-wire for dial up connections
2- or 4-wire for leased line connections
REN,
Ring r Equival nc Numb r 1
Pow r supply 230V AC –10 – +15%, 48–62 Hz (TD-32 AC)
12–36V DC (TD-32 DC)
115V AC or 36–60V DC can be delivered as optional
Pow r consumption 25 mA at 230V AC
200 mA at 12V DC
Isolation Between line, RS-232 connection and power 1500V
Fus AC 100mA, DC 1.6A
T mp ratur 5–50°C surrounding temperature
Humidity 0–95% RH, without condensation
Dim nsions 55x100x128 mm (WxHxD)
W ight 0.6 kg (TD-32 AC) & 0.4 kg (TD-32 DC)
Indications PWR, LINE, ANS, REL, TD, RD, RTS, DCD, DTR & DSR
Mounting On 35 mm DIN-rail

66178-2203
Installation
The modem should be con-
nected 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 12–3
or 3 – 0V DC a 2-pole connec-
tor.
Computers or other equipment
are connected through an
RS-232/V.24 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.
Light
emitting
diodes
Screw-block for
RS-232/V.24
connection
25-pole D-sub
for RS-232/V.24
connection
PWR
Connection
Line
connection
RJ-12
Line connection
screw block
1234567
8
9
▼▼▼
▼
▼
▼

25-pos. 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 loop back
22 9 RI Ring indicator
23 DRS Data speed select (1200/2400)
24 EXC External synchronous clock
25 TI Test indication signal
76178-2203
RS-232/V.24 Conn ctions
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.
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
Lin conn ction
The telephone line is connected to the -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
:
6
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 2-wire line is connected to pin 2 & 5
in the RJ-12 connector.
4-wire lines are connected to the screw terminal, transmitter
to TX (1 & 2) and receiver to RX (3 & 4).
12345678

86178-2203
Typical TD-32 lin conn ctions
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 kontakt
Leased line 4-wire
Telephone
Exchange Telephone Exchange
Dial up line 2-wire
Telephone
modem
1234567
8
9
The TD-32 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 ) and for example DSR
(screw terminal no 2) or by disabling the handshake with the command
AT&K0, or with switch 3:2 (switch settings).
3
4

96178-2203
Termination
2-wire
TD-32/485 (RS-422/485 int rfac )
As an option the TD-32 can be supplied with an RS-422/485
interface. This product is referred to as the TD-32/485.
On the TD-32/485 the RS-232/V.24 connection on the screw
terminal on upper front side of the unit has been replaced with
an RS-422/485 interface. All other features remain identical
between the standard TD-32 and TD-32/485. The TD-32/485
can still be connected to an RS-232/V.24 port using the 25-pole
D-sub. Please note that there is no galvanic isolation between
the RS-232 and the RS-422/485 ports so they should not be
connected simultaneously.
The RS-422/485 connections are made as shown below.
Please note that the selection of 2 or 4 wire and termination or
no termination is done by linking between some of the screw
terminals.
R+
RS 422/485
R-T+T-GND
PWR
TD
RD
RTS
DCD
LINE
ANS
REL
T4T2
V24/RS232-C
WIRE
2/4S1
1234567
8
9
TD-32/485
R+
RS 422/485
R-T+T-GND
PWR
TD
RD
RTS
DCD
LINE
ANS
T4T2
V24/RS232-C
WIRE
2/4S1
1234567
8
9
R+
RS 422/485
R-T+T-GND
PWR
TD
RD
RTS
DCD
LINE
ANS
T4T2
V24/RS232-C
WIRE
2/4S1
1234567
8
9
Termination
4-wire
4-wire
R+
RS 422/485
R-T+T-GND
PWR
TD
RD
RTS
DCD
LINE
ANS
T4T2
V24/RS232-C
WIRE
2/4S1
1234567
8
9
Connection
RS-485
R+
RS 422/485
R-T+T-GND
PWR
TD
RD
RTS
DCD
LINE
ANS
T4T2
V24/RS232-C
WIRE
2/4S1
1234567
8
9
Connection
RS-422

Switch 1
10 6178-2203
DIP Switch S tup for Dial-up and L as d Lin
Disconnect power before changing DIP-switches.
Use 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.
Non defined switches will be in off position.
ON
1234
ON
1234
1234567
8
9
Standard dial-up line
(ATE0Q1&C1&A1)
Leased line, Answering
ON
1234
(ATE0Q1&C1&A1)
Leased line, Originating
ON
1234
(AT&A1)
Do not abort if unwanted characters
are received when connecting
ON
1234
(ATE0Q1&C1)
Escape sequence disabled
(All commands ignored in on-line mode)
Related
AT-commands

116178-2203
Switch 2
2–8 are not used
For use of SW2:2 to 7
Asynchronous communication
Synchronous, external clock.
Clock from D-sub pin 24
Synchronous, internal clock,
The modem creates the clock
Related
AT-commands
ON
12345678
ON
12345678
ON
12345678
Synchronous slave.
Clock from line
ON
12345678
(AT&S0&D0&C0)
DTR/DSR disconnected
ON
12345678
ON
12345678
ON
12345678
Switch 3
4-wire line connection
2-wire line connection
(AT&K0)
Flow control OFF
(AT\N0)
REL-mode disconnected
(ATM0)
Speaker always OFF
Related
AT-commands
ON
12345678
ON
12345678
ON
12345678
%E0
Line monitor disabled and
no re-training
ON
12345678
(ATQ1E0&C1&K0&A1)
PLC settings
ON
12345678
(AT&C1)
DCD follows the state
of the line carrier
ON
12345678
ON
12345678
ON
12345678

12 6178-2203
Switch 4 (S rial sp d and format)
Automatic detection of serial
speed and format
300 bit/s
600 bit/s
1 200 bit/s
2 400 bit/s
Related
AT-commands
ON
12345678
ON
12345678
ON
12345678
4 800 bit/s
ON
12345678
9 600 bit/s
ON
12345678
19 200 bit/s
ON
12345678
57 600 bit/s
ON
12345678
38 400 bit/s
ON
12345678
7 bits no parity, [7N]
ON
12345678
7 bits even parity, [7E]
ON
12345678
7 bits odd parity, [7O]
ON
12345678
8 bits no parity, [8N]
ON
12345678
8 bits even parity, [8E]
ON
12345678
8 bits odd parity, [8O]
ON
12345678
(AT\N1)
Direct mode. [8E] or [8O]
[8O] in command mode
ON
12345678
(AT\N1)
Direct mode. [7E] or [7O]
[8N] in command mode
ON
12345678
2 stop bits
ON
12345678
ON
12345678
ON
12345678

136178-2203
Switch 5 (lin modulation)
Used saved parameters
(ATF1)
V.21; 300 bit/s
(ATF4)
V.22; 1 200 bit/s
(ATF5)
V.22bis; 2 400 bit/s
(ATF6)
V.32bis; 4 800 bit/s
Related
AT-commands
ON
12345678
ON
12345678
ON
12345678
(ATF7)
V.32bis; 7 200 bit/s
ON
12345678
(ATF8)
V.32bis; 9 600 bit/s
ON
12345678
(ATF9)
V.32bis; 12 000 bit/s
ON
12345678
(ATF10)
V.32bis; 14 400 bit/s
ON
12345678
(ATF0)
Auto detect mode
ON
12345678
ON
12345678
ON
12345678
LED Status Indicators
PWR Full Intensity The modem is functioning normally
Half intensity The modem is in test 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 auto answer mode.
REL LED flashes when the modem is in both error correcting and compressing mode.
When the modem is only in error correcting mode this LED is on.
When the modem is in direct or normal mode this LED remains off.
TD Transmitted Data: Displays data received from the local RS-232/V.24 port
RD Received Data: Displays data leaving the modem on the RS-232/V.24 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& , AT\N, AT&T, ATS0

14 6178-2203
DTE Command Lin s
In order to send commands to the modem, a prefix must be entered before the actual command(s).
This prefix is the ASCII string ‘AT’, which is an abbreviation for attention.
Commands may be entered in either upper or lowercase characters. The only exception is the prefix
‘AT’; both characters in this string must be of the same case.
Several commands may be entered on the same command line with or without space in between.
The command lines shall always be terminated by a carriage return (with the exception of the
‘A/’command).
The command consists of a single letter or a letter with the characters %, &, \, ( or * in front.
At Swedish terminals which lack \in the character set Ö is used instead. After each command there
might be a parameter, most often a numerical value. Most parameter values are written to a memory
in the modem, an S-register. Different registers are effected depending on which command has been
used.
Commands and appurtenant parameters are sent to the modem through the serial port on the modem.
This must be connected to a terminal, a computer with a communication software or other equipment
which is able to send asynchronous, serial information. Each time ”AT” is sent to the modem it will
analyse which speed and parity is being used and will then switch to the serial port. In this modem it
is also possible to use DIP-Switches to set the most common parameters and also set the modem so
that it will not react on commands coming through the serial port.
In the description of commands it is written ”Default” within brackets after some commands, this
means that the command has this value when reset to the factory parameters (AT&F).
When communication is established with another modem it is still possible to reach the command
mode by sending an ”escape” sequence to the modem. This sequence consists of an interruption in
communication, after which three characters is sent, most often plus (+++) and after which it is silent
again. The silent periods are there to prevent that a text, containing this sequence, when sent will
interrupt the connection. The silence is usually 1 second, but can be changed in register S12.
Also the character can be changed, in register S2.

156178-2203
D scription of commands
The modem can be configured and controlled with the AT-commands listed below.
A/ – R - x cut command
This command differs from the others since it will not be preceded by ”AT” and also not terminated by
ENTER.
A – Answ r
The modem will wait for a carrier for the time that was specified in S7.
Please also refer to ATDn, S0, S1, S7, S8, S9, S30
\An – S l ct Maximum MNP Block Siz
This command controls the size of data blocks used during connections with MNP, error corrected
links. The value is written to S40 bit and 7.
\A0 4 characters.
\A1 128 characters.
\A2 192 characters. (Default)
\A3 25 characters.
Please also refer to AT\N
&An – Int rrupt conn ction n gotiation
Usually the modem will abort the connection negotiation if characters are sent to the serial port dur-
ing negotiation phase.
This command gives a possibility to ignore incoming characters.
&A0 Abort connection negotiation when characters are sent to the serial port. (Default)
&A1 The modem will ignore characters on the serial port during negotiation phase.
Please also refer to AT&D
Bn – S l cting CCITT or BELL
For historical reasons the American standard for 300 and 1200 baud is different than the international.
B0 CCITT-mode (European standard) (Default)
B1 BELL-mode (American phone company)
Please also refer to ATFn, S27

16 6178-2203
&Bn – DTR Dial Option
This command enables the modem to dial a number stored with &Zn=number when the DTR signal
goes from inactive to active signal level.
&B0 No automatic call with DTR. (Default)
&B1 Call on DTR.
Please also refer to AT&Z, AT&D
\Bn – Transmit Br ak to R mot
The command controls the length of the break-signal, in a non-error correction mode. The length is
depending of the value n and is in multiples of 100 mS. During an error corrected link break will only
be transmitted to the remote modem through the active error correction protocol, giving no indication
of the length. The command works together with AT\K.
\Bn Break length in 100 mS units. The value can be between 1 and 9. (Default 3)
*B – Display blacklist d phon numb rs
This command requests the modem to return a list with blacklisted phone numbers to the terminal
equipment when asked. The format of the response is shown by the example below.
Permanently forbidden phone numbers as defined by country requirements will not appear on this list.
If no blacklisted numbers exist, the modem responds with the result code OK.
Example:
NO. – PHONE NUMBER -
1; 4175537660
2; 8288924961
3; 3887278862
4; 3124839442
5; 6284664
OK
Cn – Carri r control
This command is included for compatibility only, and has no effect other than returning a result code.
&Cn – DCD Option
The modem will handle the DCD signal depending on n. The parameter value is written to S21 bit 5.
On leased lines DCD always follows the state of the carrier.
&C0 DCD remains ON at all times. (Default.)
&C1 DCD follows the state of the carrier.

176178-2203
%C – Enabl /disabl data compr ssion
Enables or disables data compression negotiation. The modem can only perform data compression on
an error corrected link. The parameter value is written to S41 bit 0 and 1.
%C0 Disables data compression. Resets S41 bit 1 to 0.
%C1 Enables MNP 5 data connection. Resets S41 bit 1.
%C2 Enables V.42bis compression. Sets S41 bit 1.
%C3 Enables both MNP 5 and V.42 compression.
Sets S41 bit 1. (Default)
Please also refer to AT\Nn
Dn – Dialling command
This command directs the modem to go on-line and dial according to the string entered after D.
If no dial string or any other character (according to below) is supplied, the modem will go on-line
and attempt the handshake in originate mode, (dialling mode).
The command D can also be followed by other characters than numbers, these are as following:
Sends the DTMF tone corresponding to * on a regular phone.
#Sends the DTMF tone corresponding to # on a regular phone.
A-D Sends the DTMF tones corresponding to these.
JAttempts to connect this call with MNP 10 link negotiation.
(also refer to AT*H)
KEnables power level adjustment during MNP 10 link negotiation. (also refer to ATMn)
LAn L immediately after ATD makes the modem re-dial the last number.
PThe modem selects pulse dialling. In most countries this is not available.
TThe modem selects tone dialling (DTMF). This is normally used by the modem why it is
not necessary to use T when dialling a number.
S=n The modem dials the number stored in the directory with &Z. (n = 0 to 19)
WThe modem will wait for dial tone before dialling the rest of the numbers.
,A comma gives a pause in dialling. The length is determined by the value in register S8.
Note! It is neither allowed nor advisable to use comma to wait for a new dialling tone.
Use W instead.
;Semicolon in the end of a dialling command returns the modem to command mode and it
allows the user to issue additional ”AT” commands to the modem.
^The calling tone that otherwise is heard during a dial attempt, is not activated during this
specific dial attempt.
(-) Brackets, hyphens and spaces have no function and these can be used to format the com-
mand line.
If ATD.. returns ERROR the ATX0 is probably set in a country that does not allow blind dialling.
Please also refer to ATA, ATX, AT&Z, S6, S7, S8, S9, S30

18 6178-2203
&Dn – DTR Option
This command uses the incoming signal DTR to do different things, depending on n.
The value is written to S21 bit 3 and 4.
&D0 DTR drop is interpreted according to the setting as follows: (Default)
If &Q0, &Q5 or &Q is set:
DTR is ignored (assumed ON). Allows operation with DTE’s which do not
provide DTR.
If &Q1 or &Q4 is set:
DTR drop causes the modem to hang up.
If &Q2 or &Q3 is set:
DTR drop causes the modem to hang up. Auto-answer goes off.
&D1 DTR drop is interpreted according to the setting as follows:
If &Q0, &Q1, &Q4, &Q5 or &Q is set:
DTR drop causes the modem to return to command mode without
disconnecting.
If &Q2 or &Q3 is set:
DTR drop causes the modem to hang up. Auto-answer goes off.
&D2 DTR drop causes the modem to hang up. Auto-answer goes off.
&D3 DTR drop is interpreted according to the setting as follows:
If &Q0, &Q1, &Q4, &Q5 or &Q is set:
DTR drop causes the modem to perform a restart as if the Z command
were received.
The parameter &Y determines which profile is loaded.
If &Q2 or &Q3 is set:
DTR drop causes the modem to hang up. Auto-answer goes off.
Please also refer to AT&M, AT&Q, S21
*D – Display D lay d Numb rs
This command displays a list with delayed phone numbers together with the delay associated with
each. The modem will return a list with delayed phone numbers according to definition in *B com-
mand.
The example below shows the format of the list (delay times are shown as hours:minutes:seconds).
If no numbers are delayed only the result code OK is issued.
Example: NO. – PHONE NUMBER -DELAY
1; 8264734660 2:00:00
2; 7532634661 2:00:00
3; 2587334662 0:02:00
4; 7532651663 0:03:25
5; 7459931664 0:01:45
OK

196178-2203
%Dn – S tting th s nsitivity of th r c iv r
This command sets if the modem will disconnect when the signal level on the line is below the
normal value (approx. –43 dBm) or the value entered in S24, the level can only be set to values
above –43 dBm.
%D0 Disconnects the connection at a signal level below –43 dBm. (Default)
%D1 Disconnects the connection at a signal level below the value entered in S24.
Please also refer to S24
En –Command Echo
The command sees to that characters that are sent from the DTE equipment (the computer/terminal)
to the modem in command mode, either is sent back to computer/terminal, so that it is possible
to see what has been written, or not. The value is written to register S14 bit 1.
E0 Disables command echo.
E1 Enables command echo. (Default)
Please also refer to ATQ
%En – Lin Quality and R t st Ch ck
The command controls whether the modem automatically will monitor the line quality and request
re-negotiation, or not. The value is written to S41 bit 2 and .
%E0 Disables line monitoring or automatic re-negotiation of the line.
%E1 Enables line monitoring and re-negotiation of the line.
%E2 Enables line monitoring and fall back/fall forward (default)
Please also refer to ATO

20 6178-2203
Fn – S l ct Lin Modulation
This command selects which type of modulation will be used on the phone line. If this parameter is
set to something else than F0, the line speed will be fixed. The value is written to register S31 bit 1.
Either the ATF command is used or the ATN command and register S37 but not both methods
simultaneously.
F0 Selects automatically line speed according to the preference of the remote modem.
Register S31 bit 1 and N1 is set. (Default)
F1 Selects 300 bit/s, V.21 (if B0 is set) or Bell 103 (if B1 is set).
This command is equivalent to ATN0S37=1.
F2 Not supported.
F4 Selects 1 200 bit/s, V.22 (if B0 is set) or Bell 212A (if B1 is set).
This command is equivalent to ATN0S37=5.
F5 Selects 2 400 bit/s, V.22bis.
This command is equivalent to ATN0S37= .
F Selects V.32bis 4 800 bit/s or V.32 4 800 bit/s.
This command is equivalent to ATN0S37=7.
F7 Selects V.32bis 7 200 bit/s.
This command is equivalent to ATN0S37=12.
This command also enables connection to Rockwell 7 200 V.32 speed,
that is to a RC9 9 /12 based modem.
F8 Selects V.32bis 9 00 bit/s or V.32. 9 00 bit/s.
This command is equivalent to ATN0S37=9.
F9 Selects V.32bis 12 000 bit/s.
This command is equivalent to ATN0S37=10 This command also enables connection
to Rockwell 12 000 bit/s V.32bis speed, that is to a RC9 9 /12 based modem.
F10 Selects V.32bis 14 400 bit/s.
This command is equivalent to ATN0S37=11.
Please also refer to ATN, ATB, S37