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CER Design Question

Unanswered Question
Feb 8th, 2006
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Can you create more than one CER group that only serves one CCM cluster?

I have a design/deployment that has only one CCM cluster but potentially will have more than one ALI database provider across 8-10 sites.


Can some clarify how to deal with multiple ALI Databases and one CCM cluster, 2 CER Servers?

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aamercado Thu, 02/09/2006 - 00:52
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It's been a while since I did cer so here's my 2cents

2 cer servers is for redundancy so if primary cer fails the 2nd takes over

Cer can support 1 CM cluster or multiple CM clusters


ipphone > 911 CTI RP > CER JTAPI/DB > CM 911 RP to PSAP

Note: CER DB modifies callerid to match the ERL/ELIN. You have to provide the ERL/ELIN file to the local PSAP in the ALI format that the local psap will accept. Check out some common ali formats


so it depends on your local psap which formats they want

so if

site 1 calls 911, the local psap sees the site 1 ali/erl/elin

if site 2 calls 911, the local psap sees site 2 ali/erl/elin

This is because each phone is associated with its a erl/elin that is assign for the specific site in the local Ali format required.


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