I have seen many factors contribute to a one-way voice: codec/payload mismatch, wrong RTP ports#, inadequate h245 negociation, but the most common and most probable is a change in ACLs or some new security implementation on the IP routers. RTP ports are assigned dynamically and it is almost impsible to narrow them down to a sizable range in an ACL. This could be verified by the presence of RTP/UDP packets in the ACL logs. Assuming the PBX has nothing to do with this problem and that the Call Manager is taking good care of the signaling, i would suggest questioning some recent IP changes on your network. although you claim otherwise.
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...