IP Telephony and Phones

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Hello engineersI have a problem with some IP phone 8831 that are not registering because of a wrong firmware.Could you tell me which is the right firmware for this? I have this version:                     CUCM 9.1.1.20000-5 Best regards!

Hello guys,Client has a PABX and will use a Cisco2911 with E1 and will have Sip Trunk to a ITSP.With that client want to load balance some channels from E1 to each interface of the router. Example: channel 1 to 20 goes through GE0/0 and 21-30 through...