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© MiMOMax 2013 Four Wire Audio
Interface Manual
Image Showing COM (EIA232) Cable Connected
COM (EIA232) Connector (RJ45 socket)
Pin
Signal
Description
5
Transmit Data
Data Output From the FWA unit
2
Receive Data
Data Input To the FWA unit
6
Signal Ground
Signal Reference
3
NOT USED
(1)
Output (232 compatible)
7
NOT USED
(1)
Input (232 compatible)
1,4,8
Signal Ground
(1)
Not Used
Shield
Ground
Cable Shield
NOTE (1): For early Four Wire Audio Units (Serial Numbers between 2690065 and 2690109) these lines are not
connected. Although internally connected on later units their use is not currently supported.
RJ45
– DB9 mapping
Signal (FWA unit)
Pin (RJ45)
Pin (DB9)
Tx Data
5
2
Rx Data
2
3
Signal GND
6
5
