Paradise Datacom P300 Series Installation & Operating Handbook page 191

Audio Ports
Pin Number
38
39
40
41
34
35
36
37
50
All ports are 600 , with levels set independently from the front panel of +7dBm to -16dBm. Audio is
encoded as 32kbps ADPCM (or 16kbps ADPCM in some custom modes)
The Audio ports may be used in two applications:
In IBS modes if set to emulate a P1348/P1448 Audio/Data mux card, the ESC ports provide the
equivalent of the two audio ports on the P1348/P1448 (ie can transmit 64kbps=2 audio channels, or
128kbps=2 audio channels plus 64 kbps data from main data port).
In IDR modes these are used to access the IDR Audio ESC channels. One or both Audio ESC's may
be dropped in favour of 32 or 64kbps access to the channel by the Aux port.
P300H P300 Series Modem Installation and Operating Handbook
Description
Tx Audio Channel 1 in A
Tx Audio Channel 1 in B
Tx Audio Channel 2 in A
Tx Audio Channel 2 in B
Rx Audio Channel 1 out A
Rx Audio Channel 1 out B
Rx Audio Channel 2 out A
Rx Audio Channel 2 out B
Ground
Page 191