In article <201210171813.45334.r...@linux-delhi.org>, Raj Mathur (राठमाथॠर) <r...@linux-delhi.org> wrote: > Hi, > > 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). Cheers Tony -- Tony Mountifield Work: t...@softins.co.uk - http://www.softins.co.uk Play: t...@mountifield.org - http://tony.mountifield.org
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