User manual

Setting TCEQ Networking Parameters for an Enfora GSM 1208
1
SETTING UP AN GSM 1208 ENFORA MODEM
TO OPERATE WITH TCEQ’S NETWORK
Wire up the Enfora modem a 5V to 30V DC power supply. Make sure not to transpose
the plus and minus to the power connectors. Connect the external antenna.
Construct a 9 pin serial cable available that is connected one-to-one for each pin with a
female plug on one end and a male plug on the other. Here is how the cable should be
wired (from page 33 of the modem integration guide-Reference 3):
1 DCD 1
2 RX 2
3 TX 3
4 DTR 4
5 GND 5
6 DSR 6
7 RTS 7
8 CTS 8
9 RING 9
Figure 1: Schematic for serial cable between the modem (left), and “Host”, which is
the computer (from page 33 of the modem integration guide, reference #3).
Connect the modem to the computer’s serial port or an USB to serial interface. Plug in
the modem and apply power with no SIM card installed. The solid amber LED should be
solid; the green LED will probably blink which means it is searching a connection. A
solid green LED indicates that it is registered with a GSM (this will not happen until a
valid SIM card is inserted).