Hello! I have a customers with Cisco 2821 which want to use IVR on it. He has configured Cisco and told me there is no voice when number is called. The configuration is: Cisco 2821 <-- FreeSwitch (full proxy mode) --> PSTN I looked at tcpdump and the call flow is: FS (INVITE) --> Cisco 2821 Cisco 2821 (100 Trying) --> FS Cisco 2821 (RTP) --> FS I think the call flow is wrong in that case and SIP100 can not go throught Freeswitch (http://jdrosen.net/papers/draft-donovan-mmusic-183-00.txt) and there should be SIP180 to get it work. But customers said this is OK and he has no troubles with same configuration with other provider. What may I do in this sutiation? Any specific Freeswitch configuration? P.S. FreeSWITCH Version 1.0.head (git-1c95ad9 2011-01-20 22-43-50 -0300) -- Regards, Boris