The customer's setup is from CUCM to a Cisco 4331 router (R1) to another Cisco 4331 T1 PRI router (R2)to a 3rd party SIP application. I named the routers R1 and R2 for naming sakes.The 3rd party SIP application registers with the R2 router just up st...

  See the image above. Notice that the VIC card is replaying the last 50 milliseconds of the tone at a decreasing level. I believe this to be a default feature in Cisco called Packet Loss concealment. It is causing me a lot of problems when sending D...

I have an application sending DTMF Tones out of a VIC3-2 E/M card on a Cisco 2901 Router. The tail end of each tone is coming out distorted and is unable to be decoded at times. The tones are being sent in band in the g.711 voice stream. We are unabl...