I have an issue: one-way hearing due to my CUCM is under NAT/FW with its IP Phones.
I always use Wireshark (aka Ethereal) program's capture method to troubleshoot
such a problems; you know, to see what is going on on the wire. Is there any
method to get the network dump on CUCM Linux appliance and have possibility
to analyze it through 3d party software (e.g. Ethereal) later ?
If yes, please, advice how this can be performed ?
If no, what is the best methodology to see how the
CUCM and IP Phone negotiate the signaling and voice connections.
I've been looking through RTMT tool but cannot find anything relevant.