it seems if I get an re-invite from the B-Leg FS add's requires timer and changes the session timer to a high value to the re-invite going to the A-Leg come to find out Acme Packets at our ULC's do not like this and send us back a 420 Bad Extension and the call is disconnected with Reason: Q.850;cause=127;text="INTERWORKING" The ULC are stating we need to only have it in our supported and do not pass them a require. Re-Invite from B-Leg to FS ------------------------------------------------------------------------ INVITE sip:16025551212;phone-context=+1@FS_SERVER:5070 SIP/2.0 Via: SIP/2.0/UDP OpenSIPs_DID_Proxy;branch=z9hG4bK8288.10e55fe5.0 Via: SIP/2.0/UDP B-LEG_IP:5060;branch=z9hG4bKve7vp6002gr1gfsh72k0sb1gv1ek1.1 Call-Id: f8330599-d298-4233-92bb-5d622e85aa6d Contact: <sip:18475551212@B-LEG_IP:5060;transport=udp> Content-Length: 217 Content-Type: application/sdp CSeq: 33480808 INVITE From: <sip:18475551212@B-LEG_IP>;tag=100052073 Max-Forwards: 92 Session-Expires: 3600;refresher=uas Supported: timer To: <sip:116025551212@OpenSIPs_DID_Proxy>;tag=Dj92X5t8065FQ User-Agent: FreeSwitch v=0 o=- 3308986892 0 IN IP4 B-LEG_IP s=Media Server c=IN IP4 B-LEG_IP t=0 0 m=audio 51246 RTP/AVP 0 101 a=rtpmap:0 PCMU/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 a=ptime:20 ------------------------------------------------------------------------ Re-Invite from FS to A-Leg ------------------------------------------------------------------------ INVITE sip:16025551212@DID_CARRIER:5060;transport=udp SIP/2.0 Via: SIP/2.0/UDP FS_SERVER:5070;rport;branch=z9hG4bKj8yevKKS0X0mK Route: <sip:OpenSIPS_DID_CARRIER_Proxy;lr=on> Max-Forwards: 97 From: <sip:18475551212;phone-context=+1@OpenSIPS_DID_CARRIER_Proxy:5060;user=phone>;tag=c9Favaa53XFXB To: <sip:16025551212;phone-context=+1@DID_CARRIER:5060;user=phone>;tag=SDd626401-gK095bbb72 Call-ID: SDd626401-b06f59c4aa359462042e25890d7b5bfd-v3000i1 CSeq: 33480811 INVITE Contact: <sip:18475551212;phone-context=+1@FS_SERVER:5070;transport=udp> User-Agent: FreeSwitch Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, NOTIFY Require: timer Supported: timer, precondition, path, replaces Session-Expires: 64800;refresher=uas Min-SE: 64800 Content-Type: application/sdp Content-Disposition: session Content-Length: 235 X-FS-Support: update_display,send_info v=0 o=- 3308979701 3213293310682935904 IN IP4 B-LEG_IP s=Media Server c=IN IP4 B-LEG_IP t=0 0 m=audio 51246 RTP/AVP 0 101 a=rtpmap:0 PCMU/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 a=ptime:20 ------------------------------------------------------------------------