[cisco-voip] CME with SIP Trunk Call Forwarding from external not working

[Walenta, Philip]

It’s been a while sinceI’ve done CME, but if I remember correctly adding the following should allow it to work:

Voice service voip
                Allow-connections sip to SIP


That lets the router permit/make hairpin sip to sip connections (I think).

From: cisco-voip [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Olaf Goy
Sent: Tuesday, February 24, 2015 2:15 AM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] CME with SIP Trunk Call Forwarding from external not working

Hi,

I am an absolute novice when it comes to VoIP and I haven't touched an IOS device in more than 10 years. However, this hasn't stopped me from setting up CallManager Express on a 2951 for a small business. Everything works fine except for one small issue and I was hoping that the community could get me on the right track.

I have setup call forwarding to my mobile/cell on an extension. This works perfect when I call the extension from internal i.e. ext 3004 forwards to 0416845111. When I call 3004 from ext 3002, the cell rings.

The issue is when I call from outside using DID 4545 3004 it doesn't work. I get an annoucencement ‘The number you have dialled is not in service’.

I already spoke to our SIP trunk provider and they reckon it is a missing dial peer. Now, I understand precious little about dial peers or patterns. I have tried debugging but this didn't provide anymore insight into the issue.

We only use a SIP trunk so I am not sure whether there is any security feature set up that is meant to stop toll fraud or whether this is a number translation problem. No idea.

Anyone willing to help me out?

Thanks a lot.

Regards,
Olaf
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