Gd-xx to td-32b (analogue), B a c k – Westermo GD-01 User Manual
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GD-xx to TD-32B (Analogue)
Data connection between GD-xx and an analogue modem such as the TD-32B. In this
example its necessary to configure the GSM unit with an analogue protocol. An digital
protocol like V.110 will not work when establishing a connection to an analogue modem.
PSTN
CHANNEL 3
PWR
RD
TD
DCD2
DCD3
DCD4
CHANNEL 2
POWER
12-36V DC
1
2
3
4
5
- +
R+ R- T+ T-
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
R+ R-
T+ T-
T+ T-
R+ R-
GD-01
CHANNEL 3
PWR
RD
TD
DCD2
DCD3
DCD4
CHANNEL 2
POWER
12-36V DC
1
2
3
4
5
- +
R+ R- T+ T-
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
R+ R-
T+ T-
T+ T-
R+ R-
TD-32B
PC
PC
GSM in the dialling end
AT+CPIN=______
Insert PIN number if required
AT&F
To set the unit to factory default settings
AT+CBST=7,0,1
Bearer type selection. Choose data rate and protocol.
(9 600,V.32)
TD-32B in the receiving end.
Factory default settings except for SW4, which should be set to 9600,8,N,1 i.e. 2,3,5 and
6 ON.
The GD-xx has automatic line detection default (+CBST=0,0,1) but it is good to fix the
line data rate especially in PSTN modems which has V.34 protocol.The line negotiation in
the V.34 protocol starts at 33.6 kbit/s which can be a problem in some applications.
If the settings described above is needed after power off its important to save the set-
tings with the following command:
AT&W
Store active configuration
B A C K