Cisco SPA301 connected TRX audio

This revision is from 2013/03/24 18:14. You can Restore it.

• 4p4c Handset

    -------
   |    ---|  tp389  mic +2V
  |     ---|  tp390  sp
  |     ---|  tp391  sp
   |    ---|  tp392  mic GND
    -------