
WA_DEV_FEX20_UGD_002 Rev 004 March 08, 2011 39
Fastrack Xtend User Guide
5.1.2. Serial Interface
A SUB-D 15-pin connector is available as a serial interface to directly communicate with the Fastrack
Xtend. This serial interface is used for:
RS232 serial link connection
Audio lines connection (microphone and speaker)
BOOT signal connection
RESET signal connection
Figure 15. 15-Pin Serial Connector
Refer to the following table for the pin description of the 15-pin serial connector.
Table 14. Serial Connector Pin Description
BOOT. This signal must not be
connected. Its use is strictly reserved
for Sierra Wireless or competent
retailers.
Microphone positive input
Microphone negative input
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