Thanks David. 

The asterisk PBX is being shut down as it is hosted with a different provider and I am wanting to bring the PBX in-house. Once migrated the asterisk PBX will be gone/deleted.

I don't have access to any of the Asterisk backend, which is why I am moving to a different solution. The reason for wanting to stay with the same username is testing. If I could just change the dns record for the SIP server, then the phones will automatically connect to the new system and if there are any issues, I can just switch the dns record back. 

From: sr-users <sr-users-bounces@lists.kamailio.org> on behalf of David Villasmil <david.villasmil.work@gmail.com>
Sent: 13 August 2019 22:33
To: Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org>
Subject: Re: [SR-Users] Kamailio/Freeswitch auth user and UserID
 
Is the users data asterisk uses in a db? If so, you can use the usrloc module to actually get the authentication info from that dB table. Check it out.

On Wed, 14 Aug 2019 at 06:17, Petarr Jones <petarrjones@outlook.com> wrote:
Hi

I am new to Kamailio and would like some guidance on linking up with Freeswitch. 

I have an exiting hosted Asterisk PBX that uses a combination of extension and pbx username (eg 1001-126252581276) and I want to move it over to Kamailio/Freeswitch without re-configuring the SIP phones.

I have tried Freeswitch "number-alias" but it does not seem like a good fit due to things like BLF not working and the added overhead etc.

Is there a way to configure Kamailio to authenticate a user based on the above username and then send an extension to Freeswitch as the UserID instead, thereby separating the Kamailio authentication from the Freeswitch UserID?

As I don't yet have a full understanding of the Kamailio/Freeswitch interaction, I don't know whether this will cause other issues? 

Thanks in advance
Petarr
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Regards,

David Villasmil
email: david.villasmil.work@gmail.com
phone: +34669448337