I have pabx tda100 & tda0170 card and hand set kx-t7730 connections are established but when i call from kx-t7665 to kx-t7730, it was ringing but no voice is hearing in both the ends. how to fix it
PABX TDA100 with tda0170 card handset kx-t7665 & kx-t7730
Lands Phones - Panasonic