CER 9.0 One Line number on two phones at different locations

[Jacob Moe]

I'm putting some phones statically into CER and I have a line number that is on two different phones, the phones are at two different building locations. Is there a way to put both phones into CER with the same number but have the correct information be pulled up when dailing 911?

[Charles Hill]

Hey Jacob,

Yes, by using ERLS and ELINS and not using the number assigned to the phone.

ERL ties the switchport to a physical location and the ELIN is the number that the PSAP sees as the caller-id and can call back the 911 caller if call is disconnected.  I have never seen the DN on the phone used as the ELIN.

See link below.

http://www.cisco.com/c/en/us/support/docs/voice-unified-communications/emergency-responder/116058-cisco-emergency-responder-00.html

Hope this helps,

Please rate helpful answers,

Thanks.

[Chris Deren]

Not when you defined manual phones, the question is why are you adding them manually? Are these analog devices?  If they are IP phones you can either do port tracking assuming Cisco supported switches or subnet tracking.

[Jacob Moe]

I'm not adding all the phones manually, there's just some that the company wants manually added.

[Chris Deren]

Got it, you can only have unique manual phone extensions defined, so you cannot have the same extension assigned to 2 different ERLs.  If one it to be build manually and another one is tracked then CER uses the following order to figure out which one to use:

Call Routing Order

Emergency Responder directs emergency calls based on the location of the phone from which the call is placed. The location of the phone is determined by the following methods, in order of precedence:

•  Synthetic phones—The MAC address of the phone matches that of a synthetic phone and is assigned to a test Emergency Response Location (ERL). See Synthetic Phones and Set Up Test ERLs. 
•  IP Phones tracked behind a switch port—The MAC address of the IP phone is tracked behind a switch port assigned to an ERL. See Switch Port Configuration. 
•  IP Phones tracked using IP subnet—The IP address of an IP phone belongs to an IP subnet assigned to an ERL. See Set Up IP Subnet-based ERLs. 
•  IP Phones tracked by another (remote) Emergency Responder server group in the same Emergency Responder cluster—The remote server group tracks an IP phone behind a switch port or by IP subnet. When an emergency call is received, it is forwarded to the Cisco Unified Communications Manager cluster served by the remote Emergency Responder server group. See Phone Moves between Clusters. 
•  Manually configured phones—The line number of the phone is manually assigned to an ERL. See Manually Define Phones. 
•  Unlocated Phones—The MAC address of an IP phone is assigned to an ERL. See Identify Unlocated Phones. 
•  Default ERL—None of the preceding criteria is used to determine the phone location. The call is routed to the default ERL. See Set Up Default ERL.