Plan to implement CER 10.5. Do I need E911 service provider with CER 10.5?

[Phong Huynh]

Hi Everyone,

We have 50+ locations in the US and they all use a centralized phone systems. 

The voice infrastructure are CUCM ver 10.5.2 and a CUBE that connects to a SIP service provider.

The DID blocks are assigned to each location by the SIP service provider. 

Right now all 911 calls are routed out through the same CUBE and the SIP provider routes that to the right local PSAP.

Questions:

1. Can CER address Extension mobility issue, user with DIDs in Boston goes to Florida office and logon a phone? 

2. Do I need to have E911 service provider like Intrado with our CER?

3. What features do I miss when implementing CER 10.x without Intrado?

Thanks in advance for any thoughts that  you can share.

PH

[chrisnoon11]

Hello!

1.  Yes, CER works on the device level and determines the phone's location by either swtichport or subnet.  The calling party number will then be altered to the ELIN that you associated with that physical location... that will be the number / address that the PSAP receives.

2.  It depends on whether your SIP provider also provides E911 (which it sounds like they do.)  You'll have check with them to see if they will support your dedicated ELIN's.  Mine would not, so we had to work directly with Intrado.

3.  I do not know honestly.  I work with Intrado, and it is a manual process of updating ELIN's and addresses through their web portal.  If anyone else has more info on this, I'd love to hear it.

Cheers!

Chris

[will.alvord]

Just a note on #3... With Intrado, you don't have to update anything via their web portal. You can have a ptp pri or sip trunk to Intrado, and take advantage of the native CER/Intrado interop to automagically update Intrado with new/changed ERL (ALI/ELIN) data. You'd use Intrado ERL's vs Conventional ERL's, with daily sync of all ERL's and/or manually sync'ing a given ERL if you didn't want to wait.