[SR-Users] Multiple Registrations - Overwrite oldest contact

Sat Apr 2 09:18:16 CEST 2016

Hi, 

just to clarify the initially mentioned “ims_usrloc_scscf” feature:

In IMS it is not allowed to use registration credentials on more than one terminal. I think this is enforced by the feature.

If you want to use a SIP address (called Public User Identity) on more than one terminal (which leads to forking), the terminals must use different authentication user names (called Private User Identities).

This is enforced in mobile networks by using an own SIM card on each device, which usually cannot be cloned.

BR Franz

From: sr-users [mailto:sr-users-bounces at lists.sip-router.org] On Behalf Of Bruno Emer
Sent: Friday, April 1, 2016 10:37 PM
To: sr-users at lists.sip-router.org
Subject: Re: [SR-Users] Multiple Registrations - Overwrite oldest contact

Sure it is!

This is exactly what I was looking for! Actually I wasn't able to see that there was a way to perform this action!

Thanks for your help, Olle!

I will try to create this, and when I have it done, I will post my script here, so if someone else need the same problem I can help.

Now, I have just one more question about my scenario: when I register a user, is there a way to create something like a "custom field" on the location? To explain better: If possible, I can add something like a custom header that says if the user is registered from a phone device or the web interface, then I can perform the loop and replace only the oldest contact using that device...

Bruno Emer

Mobile: +55 11 96540-0044 

email: brunoemer at gmail.com <mailto:brunoemer at gmail.com> 

2016-04-01 17:18 GMT-03:00 Bruno Emer <brunoemer at gmail.com <mailto:brunoemer at gmail.com> >:

This is my problem... I want to have 2 contacts for AOR, and not only one. 

When the 3rd arrives, it must remove the oldest and continue with 2...

If I am using the 0x04 parameter, it will save just one contact, and the user will not be able to get the Invite both, in the mobile device and web interface.

Bruno Emer

Mobile: +55 11 96540-0044 <tel:%2B55%2011%2096540-0044>  

email: brunoemer at gmail.com <mailto:brunoemer at gmail.com> 

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2016-04-01 17:07 GMT-03:00 Bruno Emer <brunoemer at gmail.com <mailto:brunoemer at gmail.com> >:

Hello, Olle!

Thanks for your help in this case, and don't worry about the time (actually I wasn't even expecting to get an answer today).

I know the max_contacts parameter. But the problem is that if I set the max_contacts to 2, when the user tries to register again, he gets an error message 503. The point is that I want to get the user registered, and replace the oldest location entry for the newest one.

Bruno Emer

Mobile: +55 11 96540-0044 <tel:%2B55%2011%2096540-0044>  

email: brunoemer at gmail.com <mailto:brunoemer at gmail.com> 

2016-04-01 16:31 GMT-03:00 Bruno Emer <brunoemer at gmail.com <mailto:brunoemer at gmail.com> >:

Hello all.

I have problem here and I tried to find a solution and search over internet, but without success.

My scenario is the following: I have an application that must be registered in Kamailio when a user logs in the web interface, so he can get calls (something like a web softphone using webrtc). At this point, we are OK, and everything is working fine.

To get these register functions I am using the parameter "save("location", "0x04")" as described in the REGISTRAR module documentation, so if a user logs in another web browser or computer, only the last one will continue registered and all calls will be forwarded to him.

The point is that now we are creating a phone app that will do almost the same thing as the web interface, allowing users to receive calls using the mobile device, and here is my problem: I want to allow my users to be registered on two devices at the same time, but if a user logs into another device, I don't want to reply with a 503. I want to allow the user to register again, deregistering the oldest contact.

I saw that there is a module named "ims_usrloc_scscf" and on its description it says "implemented overwrite oldest contact behaviour", but I couldn't find any documentation about it.

So, is there a way to get this working today?

Bruno Emer

Mobile: +55 11 96540-0044 <tel:%2B55%2011%2096540-0044>  

email: brunoemer at gmail.com <mailto:brunoemer at gmail.com> 

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