50 MTM800 Enhanced Mobile Terminal Installation Manual INSTALLATION
Data Expansion Head Enhanced with 3rd Party Control Head
The Data Expansion Head Enhanced can be used with a “virtual head” on a PC or a third party 
control head.
This configuration allows the controlling of the radio (Transceiver Box) with a Control Terminal (for 
example: Personal Computer, Laptop, Console, and so forth). In this configuration, the Control 
Terminal is a substitute for the Enhanced Control Head. The Control Terminal is connected to the 
25-pin socket of the Data Expansion Head Enhanced via the GMKN4079 cable (see section 
“Connecting Cables” on page 69 for more information).
Figure 21  Configuration with Remote Control Terminal and Data Terminal
Accessory 
Connector (20-Pin
Power Connector 
BNC Antenna 
Connector 
FME GPS Conn. 
8-Wire RS232 Interface 
Data
Terminal
MTM800 Enhanced
Transceiver
Box
Control 
Terminal 
 
TELCO 
Connector 
(10-Pin) 
25-Pin subD 
Connector 
(female) 
9-Pin subD 
Connector 
(female) 
RS232 
Interface 
Top view to the chassis 
RS232 
Interface 
Cable: GMKN4079 
SB9600 
Interface 
Data Expansion 
 Head Enhanc
ed