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Our customer has a Unified CM cluster and a few Call Manager Express and he needs that ip phones registered in the CME could consult the Call Manager corporate directory. I´ve configured all steps described in the chapter "Configuring Directory Servi...

analavric by Beginner
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Has anyone had any wierd things happen with these phones?? I have been experiencing very frequent auto reboots with these phones. Just out of the blue they will reboot themselves, sometimes not just once but up to 3 times in a row. We are running 3....

Hi,We have configured SIP trunk between CUCM to OCS and in between we have firewall. what are all the ports i need to allow in firewall for call establiishment between IP phone to Office communicator. Hope CUCM RTP media stream uses 16384-32766 UDP c...