The CCNA certification for Voice has dependencies on some aspects of understanding and configuration on LAN switches; e.g the entry level device that seems to be valid towards gaining and using the switching skills to successfully be a CCNA-capable e...

I know (or am at least sure) that a CUCM 8.5 cluster is supported where three of the five  CUCM servers officially are capable of supporting the version (8.5) in question, while retaining two subscribers on MCS78x5H2's.However, what I am not sure abo...

Is IOS 15.x a recommended IOS level for SRST routers in a CUCM deployment or merely a recommendation?Customer has CM 6.1.(3) and all legacy 2800/1861 routers and none of the newer 69/88/99 series phones, so I think an IOS upgrade is optional.Thanks

Is there a copper 10Gbps SFP for the Catalyst 2960-S that is compatible for connecting to a 10GBase-T module on a Catalyst 4900M?I know there is some copper SFP's, but I don't know if they are 10GBase-T compatible. Also, with the limited distances, I...

I can find a lot of quite old interoperability documents on Tandberg and Cisco.But if a customer already had Tandberg H.323 endpoints and wanted to add a Tandberg VCS and MCU for VC bridging, what is the best way to get the Cisco phones to be able to...