User guide

Chapter 2 – Activating and Installing
MultiModem Cell User Guide 19
Connecting the Antenna, Serial or USB Cable, Power, Optional
Power or Voice Cable
MTCBA-H5 models do not support voice. The Voice jack is not included on MTCBA-H5 models.
1. Connect a suitable antenna to the ANT connector on the right side of the unit. See antenna specifications
in Chapter 1.
2. If you are connecting to a serial interface, connect a serial cable to the RS232 connector on the back of
the unit and connect the other end of the serial cable to the serial port on your PC.
If you are connecting to an USB interface, connect an USB cable to the USB connector on the back of the
unit and the other end to the USB port on your PC.
3. Set the 4-position DIP Switch on the back of the unit to the configuration of your unit.
Note: DIP switch not supported on H5 models.
Switch Position
Up/On
Down/Off
Description
Position 1
Off
DTR Reset Disabled
Position 1
On
DTR Reset Enabled
Positions 2-4
Only valid for serial builds
Position 2
Off
No TXD Terminiation
Position 2
On
TXD Diff Pair Terminated
Position 3
Off
No RTS Termination
Position 3
On
RTS Diff Pair Terminated
Position 4
Off
RS232 Mode
Position 4
On
RS422 Mode
Note: Positions 2 and 3 should only be used in RS422 Mode. Enabling TXD/RTS termination may be required to
avoid errors at high bit rates or long cable lengths. The cable is tested up to 1,000 feet but the maximum
may be more with termination enable and lower data rates.
4. If you are connecting a hand set to the unit for voice communication, connect an RJ11 cable from the
hand set to the VOICE connector on the back of the unit. To adjust the volume of the hand set, refer to
the appropriate AT Command Reference Guide.
5. Depending on the power source, connect either the power supply module with the appropriate blade or
the optional 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.
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.