[Freeswitch-users] Require Timer on re-invite from FS to A-LEG

[Mike Burlingame]

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 at 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 at B-LEG_IP:5060;transport=udp>
   Content-Length: 217
   Content-Type: application/sdp
   CSeq: 33480808 INVITE
   From: <sip:18475551212 at B-LEG_IP>;tag=100052073
   Max-Forwards: 92
   Session-Expires: 3600;refresher=uas
   Supported: timer
   To: <sip:116025551212 at 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 at 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 at OpenSIPS_DID_CARRIER_Proxy:5060;user=phone>;tag=c9Favaa53XFXB
   To: <sip:16025551212;phone-context=+1 at DID_CARRIER:5060;user=phone>;tag=SDd626401-gK095bbb72
   Call-ID: SDd626401-b06f59c4aa359462042e25890d7b5bfd-v3000i1
   CSeq: 33480811 INVITE
   Contact: <sip:18475551212;phone-context=+1 at 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
   ------------------------------------------------------------------------