I've upgraded my 2821 to 15.0(1)XA to try out CME 8.0. I have a SIP trunk coming in from an ITSP and everything works fine using 12.4(22)YB4. When I upgrade to 15.0(1)XA, DTMF stops working on 90% of my calls (I am forcing RTP-NTE). I have not changed the config between 12.4(22)YB4 and 15.0(1)XA at all.
Tech support tells me that they are receiving RFC2833 packets but they're too short - according to them, the 3 first packets have 0ms duration, the middle packet has 400ms duration and the last 3 have 800ms. They have suggested that I send inband DTMF instead, but I am not really inclined to do that because it worked before. I've tried specifying the payload setting (101) and other settings on my dial-peers to no avail. I have been forced to return to CME 7.1 because of this.
All my phones are SCCP and this problem is reproduced on a broad range of phones including analog phones off a EVM board (SCCP-controlled).
I would start by getting a packet capture. Then, you can look if you receive the packets. Something like 'rtp.payload_type == 101' may be a good wireshark filter.
For debugs, you're looking at using 'debug ccsip messages' and 'debug voip rtp session named'.
You're probably best off opening a tac case with this information because it sounds like something that isn't as straightforward. Double check your dial peers - maybe they were read in differently with the new IOS and haven't been applied the same in the two versions.
SIP traces provide key information in troubleshooting SIP Trunks, SIP
endpoints and other SIP related issues. Even though these traces are in
clear text, these texts can be gibberish unless you understand fully
what they mean. This document attempts to br...
Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
questions and it will render the proper jabber-config.xml file for you
to copy/paste. There is built in logic to verif...
CUCM Database Replication is an area in which Cisco customers and
partners have asked for more in-depth training in being able to properly
assess a replication problem and potentially resolve an issue without
involving TAC. This document discusses the bas...