1760 router doesn't connect to SIP server

[Humberto Velasco]

Hello. I have a basic configuration and I noticed the router is not connecting to the SIP server. Inside the network I can sent/received calls without a problem. The router is connected to a linksys E3200, which is connected to a 2Wire gateway. I opened the firewall to make sure ports are ready. I noticed that some times when the command show sip register status is set to yes, but most of the time is set to no.

On my config I havent set up the outgoing dial peers. Thanks

VOICE#show sip register status

Line                              peer        expires(sec)  registered

================================  ==========

333                               40001           33           no         

5616236333                        -1          131           no        

Can you please take a look and let me know where to look to find the reason this is happening.

Thanks

[Daniele Giordano]

Sounds like a NAT problem. Your 1760 sends SIP REGISTER with private IP address:

Sent:

REGISTER sip:sipconnect.ipcomms.net:5060 SIP/2.0

Via: SIP/2.0/UDP 192.168.13.20:5060;branch=z9hG4bK010F1

From: <>5616236333@sipconnect.ipcomms.net>;tag=C2DD-268C

To: <>5616236333@sipconnect.ipcomms.net>

Date: Thu, 02 May 2013 13:08:40 GMT

Call-ID: 32440D27-2BDE11D6-8002F8E3-B354FD0A

User-Agent: Cisco-SIPGateway/IOS-12.x

Max-Forwards: 70

Timestamp: 1367500120

CSeq: 2 REGISTER

Contact: <5616236333>192.168.13.20:5060>

Expires:  3600

Content-Length: 0

These messages do not have any response.

Try to enable SIP ALG on your Linksys E3200:

Regards.