Multi-Tech Systems, Inc. MultiModem CDMA User Guide
9
Chapter 2 – Installation
Connect the Antenna, Serial and Power Cables
1.
Connect a suitable antenna to the ANT connector on the back of the unit, refer to Cellular Information in Chapter 1 for
antenna specifications.
2.
Connect a serial cable to the RS232 connector on the back of the unit and connect the other end of the cable to the
serial port on your PC.
3.
Depending on the power source, connect either the power supply module with the appropriate blade or a customer-
supplied DC power cable. If you are using the power supply module, remove the protective shipping cover. Attach the
appropriate interchangeable blade piece to the power supply module.
4.
Screw-on the power lead from the power supply module to the power connection on the modem. Now, plug the power
supply into your power source.
For customer-supplied DC Power
●
Screw-on a customer-supplied DC power cable to the power connector on the modem.
●
Then attach the two wires at the other end of the DC power cable to a DC fuse/terminal block.
●
Connect the red wire to the "+" (positive) terminal and the black wire to the "–" (negative) terminal. Be sure the
GND connection is correct.
Warning:
Over-voltage protection is provided on the device. To ensure complete protection, you may want to add
additional filtering to the DC input.
Note:
For automotive application: according to the type of application, you can use permanent “+” or key-switched “+”
source. Connect the power supply to its source (for example, in a mobile situation, to the vehicle’s DC
fuse/terminal block).
Powering Down and Hardware Resetting a MTCBA-C1X Modem
It is recommended to follow the following shutdown sequence, when possible, prior to a hardware
reset or turning off of power to the modem.
The shutdown sequence informs the network that the mobile station is going offline, and saves
critical data to the module‘s non-volatile memory (flash).
AT+CFUN=0 (issue this command)
+WIND:10 (Wait for this response from the modem)
Modem is now ready to be powered off or reset.
If you do not see the +WIND:10 response, you may need to activate the unsolicited message by
using the command AT+WUSLMSK=00020000,0
