Suppose we configured 4 PRI lines on a router that are A,B,C,D these are use for Toll free number X ....& there are 10 calls hit on Toll free number so which PRI is used for these 10 Calls....options are
1. PRI "A" use because it having 30 channels so 10 calls intertain on this PRI.
2. Calls are randomaly goes on different PRI .
Is there any mechanism or Algorithm use at ISP site... or we can configure the priority on Call manager at our site
You can't control how the calls come to you with CallManager. Only your service provider can do that. Helpful service providers can configure their end to do sequential (Use all PRI A, then all PRI B, etc) or round robin (One channel PRI A, then one channel PRI B, etc) Or, the provider might just use a random channel on a random PRI.
Speak to your provider and see what they can offer you.
To add little in the wonderful response by Gordon(+5) , you can only control channel priority of outgoing calls by call manger not the incoming ones . Its also depend on how your toll free number mapped with you DID(s). Suppose you get four DIDs from Telco and its mapped with single toll free number. so the sequence of mapping decide the call flow. So last answer will be from your Telco.
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