Description: We use checkpoint firealls to process NAT for both system which have private address only. Now I can make phone connection but only get one way voice. In the firewall's log, it shows all traffic are passed completely. I am not sure whether this case is realted to NAT or not. But similar case wroks without NAT process.Please help!
You may have already tried this but can you ping the IP phone from the other side? One way voice is sometimes the result of a routing issue. The packets can get to the phone on the other side but don't know how to get back.
SIP traces provide key information in troubleshooting SIP Trunks, SIP
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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
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CUCM Database Replication is an area in which Cisco customers and
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