IP Telephony and Phones

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hi,we have an CUCM 7.1.5 with some 6941 SCCP Phones. some of them have SCCP firmware 8.5.1 or 8.5.3. I can succesfully upgrade to firmware 8.5.4.No I want upgrade them to 9.2 and at first step to 9.0.2 or 9.0.3.But upgrade doesnt work. phone says [14...

Hi team, There is a new feature called SWAP (Toggle between two existing calls) for the 6900 IP phones,  I want to know if I can activate it in a Call Manager express   solution and how I could do it.RegardsJose

I have a client about to deploy Avaya IPT and they are asking about QoS on their Cisco infrastructure.  I've been doing research but almost everything  I find is very old..2007..2005.  Does anyone know of up to date documetns or is anyone willing to ...

       Hi, it is possible have a CUCM 8.5 version cluster without dns?, when installing the second node it ask for the hostname of the primary server and this option can not be skipped, i tried using only the ip address but it was not possible.      ...