Logic of selecting ISDN BRI channels for GSM Gateway call load balancing

Unanswered Question
Aug 6th, 2009


I have 2N ISDN LITE GSM Gateway. Two sim cards with some free minutes. I want to load balance between both cards. There is a thick that on the GSM GW that says 1 SIM on 1 B-chan, 2 SIM on 2 B-chan. I'm wondering is it possible to configure logic of selecting ISDN BRI channels for example longest idle.

Any other advices will be greatly appreciated.

Thank you.

I have this problem too.
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Paolo Bevilacqua Thu, 08/06/2009 - 01:18

No, router will always choose the highest free channel on a single BRI.

It would be possible, via trunk-group, when using multiple BRIs.

KonradStepniewski Thu, 08/06/2009 - 05:44

It can be possible on gateway it self. Got SIP GSM gateway where I can implement some logic. Not sure about your model tho.

z.zdravkov Thu, 08/06/2009 - 06:02

We tried with the GSM gateway but it doesn't work. There is something written in the data sheet but there isn't documentation about it.

Now I will try to do it by prefix. For example 50% of the end users will prefix the calls with 7 and 50% with 8. The calls started with 7 will be routed to the first card and with 8 to the second.

I hoped for smarter configuration but there isn't way.

Thank you.


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