Is extension mobility supported at CME in SRST mode?

[hxmengmetro]

Hi All,

Our agents use EM to login the phone. If we configure CME in SRST mode in order to get contact center work during the WAN connection failure to hub CM, is EM still supported when CME is in SRST mode? Can I preduild the EM configuration for CME in SRST mode with "telephony-service"?

Thanks a lot!

Lou

[Jonathan Schulenberg · Accepted solution]

After reviewing documentation, the answer here appears to be no. The main problem is that a phone that falls back to CME in SRST mode does not download a configuration from CME TFTP but instead provides its existing configuration to CME/SRST. Since a TFTP file is never downloaded from the router, the phone will not have the appropriate service URL for the CME-based Extension Mobility service. The closest you can come is to configure ephone and ephone-dn on the router so that those values override what the phone tells CME during fallback.

[Jaime Valencia · Accepted solution]

Jonathan is right here, EM is not supported under SRST or CME-as-SRST.

Phones will keep working with their current config but there is no login or logout ability.

HTH

java

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[Jonathan Schulenberg]

Java-

Do you remember the name of the protocol that the phones use to share their config with SRST/CME? I know it has a name but haven't been able to remember that trivia fact in a while.

[Jaime Valencia]

mmmm. I know at some point I read something about it, but honestly, can't remember it right now.

I'll try to find it during the day and will let you know if I'm sucessfull

java

[hxmengmetro]

I guess it is "SNAP"?

[hxmengmetro]

Jonathan,

Thanks a lot. So even with prebuild, the phone still won't download the file through tftp? That's bad.So if no EM supported at CME in SRST mode, I need assign every phone to specific extension number. Then the agent can't move around since their extension number will be binded to the phone permanently. Because we only have limited quantity of phones and every shift people are changed, it's better to have EM supported. Can I configure a log out and user profile, then assign them to the ephone? If the WAN outage happen, I can have the agent reset their phone to get the new configuration from the router. Is this doable? I don't have router which I can test it. Sad.

Thanks a lot!

Lou

[Jaime Valencia]

If you need EM as this seems really important for you environment, why don't you look into getting a subscriber into that location so you can have EM??

HTH

java

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[hxmengmetro]

Thanks Java. I'm thinking could I use dynamic hunt group membership to emulate the extension mobility. By define "ephone-hunt login" under the ephone-dn, use wildcard in hunt group list. I haven't figured out the exact way to do that in SRST mode. Maybe it's possible.

Lou