IP Telephony and Phones

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Hello,help me pls analyze the log. I cant perform call from 1991(Avaya phone) to 1225(Cisco 6921 SIP phone). When i call from cisco to avaya everything is ok.CME 9.5. Avaya and Cisco connected over H.323. P.S. Or did i need to use SIP trunk - "SIP en...

Dear experts....a small question                         What if i add two ip phones in parallel....means the same eight wires will go on two phones at a times by making proper arrangement and increasing the port inline consumption power....will it w...

hi,If I use the template for 2500 users, and my cluster with 9 cucm servers, with only 4 of them have callmanager service, does it mean that i can have 2500 x 4  = 10000 phones in my cluster?I am wondering if we can deploy different capacity of cucm ...