Hello,I've got a problem with the cupc 8.X. When I'm in the deskphone mode (with a 69XX) i'm not not able to play a message in the voicemail with the cupc (there's an error on the pc). However in the softphone mode it works fine. For information I us...

Hi,For a remote site, my customer wants a group of 2*E1, each being connected to one ISR gateway with SRST.In cas one WAN problem, what happens ? How should I configure SRST to be sure that all the phones will be connected ? Do I need to buy SRST lic...

Hi,I want do deploy a centralized CUCM for up to 10.000 users.This  will be done on UCS 210 servers.In that configuration, can I dedicate a VM to CUCM DHCP service or is it better to user an external DHCP server ?Thanks for your help.

Hello,My client has a CCME in release 4.3.He wants to migrate to the last release.What are the necessary licenses he has to pay ?Thank you for your help.

Hi,I want to upgrade a CUCM to a 8.5 release.My clients has lots of ISR gateways 28XX.Do I have to upgrade them to 15.X IOS and so to uprade the memories or is it possible to keep the routers in IOS 12.x ?I precise that I don't need 8.5 new features ...