I am having some trouble with a UC520/CUE with a SIP Trunk Provider.
The scenario is that we have the UC520 on our LAN with its F0/0 WAN port directly connected to a DMZ, with a public IP Address on the internet, and we have inbound/outbound calls via a UK SIP Provider. Inbound and Outbound calls are ok (to a Cisco Phone running SCCP).
However, when an inbound call is fowarded to the CUE module over the CUE SIP trunk, the caller hears the Voicemail greeting, can press keys so DTMF works, the media streams "seem" to be up, but I get no voice packets received by the CUE. The caler thinks they are leaving a Voice Message, but the CUE never receives the audio.
I have diabled H.450.2/3 etc and added the "allow connections sip to sip" to try and purely hairpin the call via the UC520 to the CUE, avoiding any media renegotiation/NAT issues, but no luck.
I also have an H.323 trunk to anothe CME, and if a call comes in over the H.323 trunk, and is forwarded to the CUE, it's fine, but its over an internal connection/GRE tunnel so no NAT etc is involved.
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...