On Wed, Jul 30, 2008 at 05:33:15PM -0500, Cesar Cepeda scribbled: # Hi, [snip] # . After exactly 10 seconds the consumer channel is hung up by FS # with reason UNKNOWN. [snip] # It would seem that the problem is that sofia detects that I'm not sending # any audio and hangs up. Cesar, Just for reference: I read your mail after having randomly had a similar issue. In my case; any call I made to/received from the PSTN was dropping randomly. My path is: [PSTN]<-(PRI)->[Audiocodes Mediant 1000]<-(SIP)->[FreeSWITCH]<-(SIP)->[Phone] It was hanging up with reason UNKNOWN (CS_EXCHANGE_MEDIA) and it turns out the magical 10 seconds came into play: The audiocodes gateway had a setting labelled "Disconnect on broken connection", I disabled it and the problem went away. I wonder if your phone(s) have one of these settings? -- Jonathan Towne