[asterisk-users] Fully utilise all PRIs in a DAHDI group

[Raj Mathur ( राज माथुर )]

On Wednesday 17 Oct 2012, Tony Mountifield wrote:
> In article <201210171813.45334.raju at linux-delhi.org>,
> Raj Mathur (à€°à€Ÿà€   à€®à€Ÿà€¥à¥ à€°) <raju at linux-delhi.org> wrote:
> > Our client has DAHDI groups with 4 PRIs in each group (one 4-port
> > interface per group), up to 6 groups per server.  When we dial, we
> > can specify the group to be used for dialling, and our dial plan
> > automatically distributes calls over multiple servers and multiple
> > groups within a server.
> > 
> > The way Asterisk dials by default is to use the lowest-numbered
> > free line in a group to place a call.  This is technically fine. 
> > However, what it means for our client is that the first couple of
> > PRIs in a group tend to get the bulk of calls, the other two
> > remain more-or-less unutilised.  This is a problem, since there
> > are call commitments to the Telco for each PRI line.  The Telco
> > tends to get all soggy and hard to light if some of the PRIs are
> > used way below committed call levels.
> > 
> > One solution is to group at the individual PRI level, so the load
> > balancing automatically takes care of fair utilisation of each PRI.
> > However, for various reasons we'd prefer not to do this.
> > 
> > Another solution would be if Asterisk could choose a random (or LRU
> > or LCU or round-robin or any other scheme) PRI within a group when
> > dialling.  Any roughly fair way to distribute calls to PRIs within
> > a DAHDI group would be fine.  Is there some way to achieve this?
> > 
> > Asterisk 1.8.8 on Debian Squeeze.
> 
> Instead of dialling using DAHDI/g1/123456789, you can try using
> DAHDI/r1/123456789 to make Asterisk use the channels in round-robin
> order instead of always choosing the lowest free channel.
> 
> See http://www.voip-info.org/wiki/view/Asterisk+ZAP+channels (I could
> not find comparable information on the Asterisk WIKI at
> https://wiki.asterisk.org).

Thanks to you and Steve Totaro, that's exactly what I need.

Regards,

-- Raj
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