[Spce-user] Masked contact parameter 'ngcpct' missing

[Daniel Grotti]

Hi,
Since 200 OK contains Contact
<sip:ngcp-lb at a.b.c.d:5060;ngcpct=7369703a3132372e302e302e313a35303830>,
I'd expect to see the ACK from outside with the same R-URI.
Can you paste all the LB and proxy log ?

Daniel



On 01/20/2014 11:04 AM, Marc Storck wrote:
> Good morning,
> 
> I have noticed an issue with calls to "voiceboxpass" from a VoIP peer.
> 
> In our case, after the call is answered by  the NGCP Asterisk, kamailio-lb sends a SIP 200 OK to the VoIP peer with the following contact he
> 
> Contact: <sip:ngcp-lb at a.b.c.d:5060;ngcpct=7369703a3132372e302e302e313a35303830>
> 
> The returned SIP ACK does not contain a contact header field at all, and kamailio-lb logs the line:
> 
> Masked contact parameter 'ngcpct' missing, trying fallback to 'sip:sems at 127.0.0.1:5080' - R=sip:ngcp-lb at a.b.c.d ID=2936446182-25278 at SVIGateway
> 
> As far as I can see, the ACK is forwarded to the kamailio-proxy running on port 5062, however no packet is forwarded to the asterisk server on port 5070.
> 
> Kamailio-proxy logs:
> 
> New request - M=ACK R=sip:sems at 127.0.0.1:5080 F=sip:1234567890 at a.b.c.d T=sip:did-of-voiceboxpass at w.x.y.z IP=a.b.c.d:5060 (127.0.0.1:5060) ID=2936446182-25278 at SVIGateway
> 
> As the SIP ACK never reaches the NGCP Asterisk server, the Audio Stream is terminated after 16 seconds.
> 
> The missing Contact header in the SIP ACK message does not cause any issues when calling a subscriber or a conference.
> 
> Is there something that can be done to fix the access to the NGCP Asterisk server?
> 
> Regards
> 
> Marc Storck
> 
> 
> 
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