Hello all, I’ve been reviewing a bunch of pcaps today during interop with a new ULC and I noticed that our FreeSWITCH instances send an Expires header in the INVITE that wasn’t present before the challenge. I’ve got <param name="enable-timer" value="false”/> set in the profile, am I missing something? Thanks! Spencer Trace excerpt below: # U A.A.A.A:5080 -> B.B.B.B:5060 INVITE sip:1NPANXX2222@B.B.B.B SIP/2.0. Via: SIP/2.0/UDP A.A.A.A:5080;rport;branch=z9hG4bKjp8H9Q9vUvmZp. Max-Forwards: 69. From: "DISPLAY NAME" <sip:1NPANXX1111@A.A.A.A>;tag=gFX13g0aS2Z8D. To: <sip:1NPANXX2222@B.B.B.B>. Call-ID: 9b82c095-1e10-1233-a19e-001851124686. CSeq: 70696564 INVITE. Contact: <sip:gw+GW-NAME@A.A.A.A:5080;transport=udp;gw=GW-NAME>. Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE. Supported: path. Privacy: none. Content-Type: application/sdp. Content-Disposition: session. Content-Length: 286. P-Asserted-Identity: "DISPLAY NAME" <sip:1NPANXX1111@A.A.A.A>. . v=0. o=WSC_PBX 1422043530 1422043531 IN IP4 A.A.A.A. s=SIP Media Capabilities. c=IN IP4 A.A.A.A. t=0 0. m=audio 21726 RTP/AVP 0 18 101. a=rtpmap:0 PCMU/8000. a=rtpmap:18 G729/8000. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-16. a=silenceSupp:off - - - -. a=ptime:20. # U B.B.B.B:5060 -> A.A.A.A:5080 SIP/2.0 407 Proxy Authentication Required. Via: SIP/2.0/UDP A.A.A.A:5080;rport=5080;branch=z9hG4bKjp8H9Q9vUvmZp. From: "DISPLAY NAME" <sip:1NPANXX1111@A.A.A.A>;tag=gFX13g0aS2Z8D. To: <sip:1NPANXX2222@B.B.B.B>;tag=45e7e4a19f9e2adbb8c0c696f8c31422.8a84. Call-ID: 9b82c095-1e10-1233-a19e-001851124686. CSeq: 70696564 INVITE. Proxy-Authenticate: Digest realm="A.A.A.A", nonce="VMRPz1TC/k8QLkFKz6mNTenFQ4hT8yIrSb4tyoA=", qop="auth". Content-Length: 0. . # U A.A.A.A:5080 -> B.B.B.B:5060 ACK sip:1NPANXX2222@B.B.B.B SIP/2.0. Via: SIP/2.0/UDP A.A.A.A:5080;rport;branch=z9hG4bKjp8H9Q9vUvmZp. Max-Forwards: 69. From: "DISPLAY NAME" <sip:1NPANXX1111@A.A.A.A>;tag=gFX13g0aS2Z8D. To: <sip:1NPANXX2222@B.B.B.B>;tag=45e7e4a19f9e2adbb8c0c696f8c31422.8a84. Call-ID: 9b82c095-1e10-1233-a19e-001851124686. CSeq: 70696564 ACK. Content-Length: 0. . # U A.A.A.A:5080 -> B.B.B.B:5060 INVITE sip:1NPANXX2222@B.B.B.B SIP/2.0. Via: SIP/2.0/UDP A.A.A.A:5080;rport;branch=z9hG4bKKZ1aBKt0r5ajj. Max-Forwards: 69. From: "DISPLAY NAME" <sip:1NPANXX1111@A.A.A.A>;tag=gFX13g0aS2Z8D. To: <sip:1NPANXX2222@B.B.B.B>. Call-ID: 9b82c095-1e10-1233-a19e-001851124686. CSeq: 70696565 INVITE. Contact: <sip:gw+GW-NAME@A.A.A.A:5080;transport=udp;gw=GW-NAME>. Expires: 90. Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE. Supported: path. Proxy-Authorization: Digest username="8729701", realm="A.A.A.A", nonce="VMRPz1TC/k8QLkFKz6mNTenFQ4hT8yIrSb4tyoA=", cnonce="m4QpfR4QEjOeoQAYURJGhg", algorithm=MD5, uri="sip:1NPANXX2222@B.B.B.B", response="744aa6cda6803838bcf8c87d1810c6ed", qop=auth, nc=00000001. Privacy: none. Content-Type: application/sdp. Content-Disposition: session. Content-Length: 286. P-Asserted-Identity: "DISPLAY NAME" <sip:1NPANXX1111@A.A.A.A>. . v=0. o=WSC_PBX 1422043530 1422043531 IN IP4 A.A.A.A. s=SIP Media Capabilities. c=IN IP4 A.A.A.A. t=0 0. m=audio 21726 RTP/AVP 0 18 101. a=rtpmap:0 PCMU/8000. a=rtpmap:18 G729/8000. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-16. a=silenceSupp:off - - - -. a=ptime:20.