Remove plus + sign (+7000 to 7000) from external calling

[sunjie (Jie)]

Hello guys:

I am very new to pbx, so please excuse me if I say anything stupid below.
My FreePBX currently setup with another SIP system. When the request incoming, log as below
From: <sip:201 @. xxxxx>;tag=gK08061f3e
To: <sip:+7000 @. xxxxx>;tag=a968c9f3-683a-4ddf-b67e-95672966d819

I have an extension setup as 7000, since the incoming request is +7000, obviously it does not exist. Is there a way I can remove the + sign here when external system sends + even for internal extension calling?

Thank you very much!

[Stewart1 (Stewart)]

One option is to set SIP Alias for extension 7000 to
+7000
and the call should then be accepted. If you have many extensions, you could use Bulk Handler to set them up.

Another approach is custom dialplan to delete the +. For example, add to /etc/asterisk/extensions_custom.conf

[from-internal-plus]
exten => _.,1,goto(from-internal,${EXTEN:1},1)

then change Context for your trunk from from-internal to from-internal-plus.
This just deletes the first character from all destinations received by the trunk. You may need something more complex to deal with external calls, emergency calls, etc.

[david55]

When using the standard initial contexts, FreePBX does not use the To: header; it uses the request URI, the one immediately after “INVITE”. If that is the same as the one in the To: header, the previous replies are still valid.

[sunjie (Jie)]

Thank you Stewart1.
Does the alias solution work for legacy chan_sip as well? Or just for pjsip?
And the alias should be created under Misc application?

Thank you again

[Stewart1 (Stewart)]

SIP Alias is an Advanced setting for the extension, available for both pjsip and chan_sip.

However, if you’re setting up a new system, there is probably no reason to create anything with chan_sip.