[asterisk-dev] NFAS Implementation Spanning Multiple Servers

Matthew Fredrickson creslin at digium.com
Sat Feb 4 11:08:17 MST 2006

On Feb 4, 2006, at 11:13 AM, Kevin P. Fleming wrote:
>> Agreed.  The message redistribution part will probably not be too 
>> hard.  We are going to have to decide on how to approach the other 
>> side of this though for it to truly be a working solution for 
>> something other than limited call termination and inbound calling.
> I'm not sure the outbound calling situation is the same as the one we 
> have discussed with SS7.
> If the box(es) that are handling the 'real' D channels are 
> distributing Q.931 messages among all the boxes with B channels, then 
> any box can initiate an outbound call on one of the B channels that it 
> controls. There is certainly a concern if one of those boxes tries to 
> initiate a call and the switch on the other side decides to use a B 
> channel that the originating box does not manage... but we may be able 
> to avoid that situation.

Yeah, we can trick it I think.  IIRC, In the Channel-ID IE we basically 
set the outbound channel that is selected so that it can't be 
renegotiated.  However, I think that our approach with the SS7 cloud 
could be useful for this scenario as well, for things such as normal 
hunt patterns on the trunk group.

Matthew Fredrickson

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