Posted on behalf of Tayeb Meftah... hi dear friends, we have a siemens hie9200 softswitch we want to interconnect freeswitch with it to use it for service, like media, voicemail, audio conferencing and ... call trace is atached belo if we calls from tdm, call is passed but without rtp i routed a number like 021000000 is a tdm number to 3001 the default 8khz fs conference so inbound call is passed but without audio for outbound calls, i wanted to call a tdm number, like 021298235 the call tack some long time but return a 500 internal server error from the hie9200 softswitch: sip.Reason == "Q.850 ;cause=47 ;text=\"Resource unavailable, unspecified\"" from fs i get normal temporary failur so please see the trace and return for me any reply ;) thanks for your helps and times. Traces at: http://siplabs.net/tracebin/fs-siemens-500.pcap http://siplabs.net/tracebin/fs-siemens-rtp.pcap