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...
You can find the exact frequency as well that is being received from Service Provider. I have a article in Support Forum: https://community.cisco.com/t5/collaboration-knowledge-base/troubleshoot-audio-issues-and-fxo-disconnect-issue-using-pcm/ta-p/39...
"487 request terminated" suggests that a request was terminated by user or application. It can also be sent by UAS(in your case it's called side-ITSP) to client(UAC-Your calling party), after client sends a CANCEL request. If you can send the complet...
It could be related to media resource not available as call is disconnecting with CV 47. I see in the logs that the endpoint is ringing. The issue could be due to codec mismatch.