[asterisk-users] SIP domain different than provider's

[Sam]

Hello,

I have what I would think would be a common situation: I run asterisk at 
home simply as a land line. I started a new job working remotely and 
they gave me a SIP account with user name, domain, and proxy. I've never 
had to deal with sip domains before. My user '140 at 4354766787.com' is 
handled by a 3rd party provider: 'sip.provider.com' and my local domain 
on my asterisk box is the hostname 'mypbxdomain.com'.

My normal extension I use for everything is just '111'. I figured the 
best way of joining my asterisk box was to just hard code in the 
extensions I would need to dial for my remote office work (there are 
only a couple of extensions so shouldn't be a big deal).

However I struggled to get authentication working for outgoing calls to 
the few new extensions at the remote office through their provider. 
Looking at debug logs it was clear that the sip 'To' address was wrong. 
It had the provider: "To: <sip:139 at sip.provider.com>" instead of the 
domain which should look like: "To: <sip:139 at 4354766787.com>" (right?)

In the end, after hours of googling, reading the docs on sip.conf 
several times revealed a little spoke of '!' dialplan option. Simply 
changing my dialplan from 'Dial(SIP/workphone/${EXTEN})' to 
'Dial(SIP/workphone/${EXTEN}!${EXTEN}@4354766787.com)' fixed the issue.

But this seems really hackish. Is this the right/only way? Or is just 
having a provider and mismatched domains not really the norm?

I have an an anonymized log here: http://tinyurl.com/ouy2ajr



Regards,
Sam