CTI Products NCB/IM with Internal PSTN Modem - Manual (Page 44)

CTI Products, Inc. NCB/IM User Guide
Appendix C. Connector Details 38
AUDIO Connector
Connection point for a telephone style handset or other audio device to make use of the
simultaneous voice/data feature
Connector type: Standard RJ11 telephone type, 4 position 4 contact
Pin Function Notes
1 audio in Inactive during training, simultaneous voice audio in after
training
2 audio out Line audio during training, simultaneous voice audio out after
training
3 audio ground
8 audio ground
AUDIO
1
2
3
4