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GSM2218PB001MAN - GSM/GPRS MT-GL User Manual Page 8
Copyright 2005, Enfora L.P
2.2.1 12 pin Connector
The user can purchase the optional 12-pin external I/O connector for the Enfora MT-GL that can be
used to interface with other devices. Enfora can provide an optional cable and connector (Part
#ADT2218). The user also has the option of building his/her own cable. Table 1 describes the pin
functionality for this 12 pin I/O connector. Pins that are not planned for usage can be left open without
anything connected to them.
Pin Number Functionality
Pin – 1 Serial Data Out
Pin – 2 Serial Data In
Pin – 3 Audio – Ear Speaker Out (-)
Pin – 4 Audio – Ear Speaker Out (+)
Pin – 5 Audio – Mic Input (+)
Pin – 6 Audio – Mic Input (-)
Pin – 7 User Controlled Output
Pin – 8 User Controlled I/O
Pin – 9 User Controlled I/O
Pin – 10 Switched Power (Ignition)
Pin – 11 Unswitched Power (Battery)
Pin – 12 Ground
Table 1 - 12 pin I/O Connector Interface
Figure 8 - I/O Connector