IP Telephony and Phones

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Hi,before days, I had a strange issue at group of phones Cisco 7821 sip phones, this group is under device pool, as I have many branches are registering to one CUCM 11.5 cluster, each branch has its own device pool, the problem was the phones of one ...

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We will begin testing Jabber with VDI on Wyse thin clients. Unfortunately the only release (12.1) does not support Expressway. TAC mentioned that there may not be more Jabber VDI releases for this product. Is anyone currently using this product?Or at...

It is normally set in voice vlan 1, but not in such as vlan 10 or vlan 20 Help me  Switch  Switch#show runBuilding configuration... Current configuration : 1350 bytes!version 12.2no service timestamps log datetime msecno service timestamps debug date...

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xidasd by Beginner
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I AM FACING A REGISTRATION PROBLEMS WITH MY DX 650 IP PHONE I HAVE PALO ALTO FIREWALL BETWEEN CUCM SERVER AND IP PHONES WHILE CAPTURING LOGS I FOUND THAT FIREWALL IS SENDING TCP (RST/ACK) MESSAGE. ALL MY 8811 IP PHONE GOT REGISTERED BUT NOT 650.