In the Cisco CallManager Express environment, if a call is made from one IP phone to another that is busy, then no busy tone or engage tone is heard. This is a normal behavior when ephone-dns are configured as dual-line. This means that each line instance has two channels available. This is needed for things like full consult transfer and conference. The normal behavior with dual-line configured is that if a call is already active on the first channel, and another call is made to that extension, it rings on the second channel.
If you want a busy tone to be returned when an extension is busy on the first call, you can configure huntstop channel. This output provides an example:
ephone-dn 1 dual-line number 20873 pickup-group 200 name Dave Pandit
Hi expertsmay I ask how to force rtp go through cube, our voip environment isgenesys — cube — cucm All established call is point to point rtp transmition, cube is only forwarding signaling , is there any ways to make rtp can through cube?
I have an axis camera connected via third party sip to CUCM, when calling a newer sip phone whenever a DTMF is pressed the call disconnects. Works fine with older model phones, any ideas? if it helps I see this in wireshark before disconnect, BYE rea...
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Hello, my apology for not posting a technical question. I'm a Avaya tech who wants to learn Cisco CUCM by building a mini CUCM home lab. I'm seeing a lot CME lab kits on Ebay however, I believe CUCM and CME are completely different from each o...