Troubleshooting DTMF in MGCP and PRI WHAT IS DTMF? DTMF (Dual Tone Multiple Frequency ) is used to send to signals for button presses on telephones. The data is typically sent over voice channels and so in...

This document contains the details related to PRI. It contains steps to troubleshoot ISDN Layer 1 and Layer 2 issues along with basics of how to read isdn q931 debugs.

                       Troubleshoot Audio Issues and FXO Disconnect Issue Using PCM   There are cases/situations where we have to configure custome CPTONE to resolve FXO disconnect issue. Following are situations which can arise due to FXO disconnect...