[cisco-voip] CER and Route Patterns per ELIN

[Pawlowski, Adam]

I'm going over our CER installation in preparation of Bridge upgrade to 9.0(2) from 7.1(1a). This program looks to be pretty simplistic, though the amount of administrative data is a pain to set up initially. What I'm a bit confused on is the directions or indications that each ELIN needs a unique route pattern. In the 9.0 admin guide it no longer seems to specify trying to bother with transforming the called number since it will be presented by CER. In the 7 guide it does, but works fine without this anyways.

My question here is, though, if we've a pile of ELINs going to the same PSAP with the same access number from the same gateway/rl/etc, why bother creating route patterns for each thing? It seems like it just makes it more of a pain but doesn't actually accomplish anything. I've tested this, and it seems to work alright, as long as you fill in the ELIN correctly in CER with the proper digits to facilitate the return call. Am I missing something?

Thanks,

Adam P
SUNYAB