Cisco Emergency Responder

[JMCNEL]

We are currently on CUCM ver 11.5 and is considering purchasing Cisco Emergency Responder.

We have a large majority of users that are currently configured with extension mobility.

With the CER / onsite alert system, when someone dials 911, a message gets sent to cell / email to dedicated personnel.  The message include the extension / name  and room number / floor or whatever is in the display name field correct ?  How does the system deal with extension mobility - what fields does it use for notification, what  if the user  forgets to log in? 

For instance we used the following 

if logged into extension mobility, the display name is

<user name / 5 digit ext>

if not logged on display name is

<school - room / 4 digit ext>  

My question is what type of impact if any would we run into on CER as it relates to the phones having their own extensions and then the user having extension mobility extension and whether they are logged nor not logged in

Also what is the best practice (1 DID per device) which can turn into a nightmare trying to keep up with locations because folks keeps on moving phones and the location information kept changing or say a few DID's per location and just device the building.

What information did you use for the notification (floor / room / ext / name) or anything else.

Any recommendations would be appreciated. What is pro's / con's and what are the issues you run into when you where setting up CER/ anything to look out for ?

thanks

[Andrew Skelly]

CER uses SNMP to query CUCM and the local switches.  It knows the phones physical location based on the switch port, not based on any description on the phone or DN.  As such it doesn't matter if a user logs in to the phone or not, location is based on the switch port the physical phone is connected to.  CER combines the data from CUCM with the information from the switch to determine phone information and location.  i.e. the phone MAC must be configured in CUCM and on a switch port before it will show in CER database.  If plugged in to switch but not configured in CUCM then it won't show.

Here's a great article that should help clarify CER on the whole a bit better:

https://community.cisco.com/t5/collaboration-voice-and-video/cisco-emergency-responder-cer-explained/ta-p/3138289#ERLs

[Tanner Jackson]

In addition to Andrew's comment, you can configure IP Subnets for voice, data and wireless VLANs to cover devices in the event of SNMP failure and any Jabber clients or wireless Cisco devices (if you use any).

This also becomes VERY helpful if you have a rogue switch show up that your network team hasn't told you about but any devices connected would still be covered by the IP Subnet.

Analog lines on a VG or FXO ports can also be set up as Manually Configured Devices if you have analog endpoints as well.