[Serusers] Meaning of and proper response for a 401

[SIP]

SIP wrote:
> There's a UA in our network that responds to a reinvite with a 401. 
>
> U PROXY.IP.ADDRESS:5060 -> UA.IP.ADDRESS:63718
> INVITE sip:1101XXXXXXX at UA.IP.ADDRESS:63718 SIP/2.0.
> Record-Route: <sip:PROXY.IP.ADDRESS;ftag=as7bbe322e;lr=on>.
> Via: SIP/2.0/UDP PROXY.IP.ADDRESS;branch=z9hG4bK9159.cd2a95b4.0.
> Via: SIP/2.0/UDP PSTN.GW.IP:5090;branch=z9hG4bK39c17f01;rport=5090.
> From: <sip:13154476314 at our.domain.com>;tag=as7bbe322e.
> To: "User One" <sip:1101XXXXXXX at our.domain.com>;tag=202d9942.
> Contact: <sip:13154476314 at PSTN.GW.IP:5090>.
> Call-ID: 6b3f44351f5fab945ac212a2141df93a at UA.IP.ADDRESS.
> CSeq: 102 INVITE.
> User-Agent: Asterisk PBX.
> Max-Forwards: 16.
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY.
> Content-Type: application/sdp.
> Content-Length: 314.
> P-hint: LR.
> .
> v=0.
> o=root 15241 15243 IN IP4 216.143.130.90.
> s=session.
> c=IN IP4 216.143.130.90.
> t=0 0.
> m=audio 17192 RTP/AVP 0 8 18 3 101.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:8 PCMA/8000.
> a=rtpmap:18 G729/8000.
> a=fmtp:18 annexb=no.
> a=rtpmap:3 GSM/8000.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:101 0-16.
> a=silenceSupp:off - - - -.
>
>
>
> #
> U UA.IP.ADDRESS:63718 -> PROXY.IP.ADDRESS:5060
> SIP/2.0 410 Gone.
> Via: SIP/2.0/UDP PROXY.IP.ADDRESS:5060;branch=z9hG4bK9159.cd2a95b4.0.
> Via: SIP/2.0/UDP PSTN.GW.IP:5090;branch=z9hG4bK39c17f01;rport=5090.
> From: <sip:13154476314 at our.domain.com>;tag=as7bbe322e.
> To: "User One" <sip:1101XXXXXXX at our.domain.com>;tag=202d9942.
> Contact: <sip:1101XXXXXXX at UA.IP.ADDRESS:63718>.
> Call-ID: 6b3f44351f5fab945ac212a2141df93a at UA.IP.ADDRESS.
> CSeq: 102 INVITE.
> Content-Length: 0.
>
>
>
>
> First off, I thought a 410 was supposed to be unauthorised (what is 
> 'Gone' ?). Secondly... is the UA requesting our server to authorise its 
> reinvite, or is something else going on here I clearly don't follow?
>
>
> N.
> _______________________________________________
> Serusers mailing list
> Serusers at lists.iptel.org
> http://lists.iptel.org/mailman/listinfo/serusers
>   
And of course, I just realised that I'm apparently dyslexic and can't 
tell the difference between a 410 and a 401.

However, my question still stands. What IS a 410 response (what RFC is 
it in?), and how should SER respond to it? Send a BYE? A CANCEL? Ignore 
it and hope it goes away?

N.