[quote="james"]Hi In the above case, which port is the RTCP's mapping port? (Is it 30001?) Yes, in this case the NAT change RTCP to 30001 Do you have any packets trace? If possible let you share a packet trace at http://www.pcapr.net/[/quote] I have send register letter , but no response. You can ...

1. Brekeke Product Name and version: Brekeke SIP Server , Version 3.0.6.3 Evaluation 2. Java version: java 1.6.0_24 3. OS type and the version: Ubuntu 10.6 4. UA (phone), gateway or other hardware/software involved: no 5. Select your network pattern from http://www.brekeke-sip.com/bbs/network ...