New features in Cisco’s CallManager software promise to make the IP PBX platform more secure and interoperable with standards-based VoIP equipment, while adding native support for video phone calls, ...

Cisco System Inc.’s update to its CallManager IP PBX — introduced this week with native SIP support — will require broader upgrades to other network ...

Today as expected, Cisco announced they have finally embraced SIP (Session Initiation Protocol). The platform for doing so will be Cisco Unified CallManager5.0, the call-processing component of the ...

VoIP vendors poised to make news at VoiceCon this week say they will deliver on the multimedia and interoperability promises of Session Initiation Protocol with a lineup of products that use the ...

Cisco Systems Inc.’s update to its CallManager IP PBX — introduced this week with native Session Initiation Protocol (SIP) support — will require broader ...

We have a CUCM 8.5 cluster here, and a CME in China. When we make a call from China to here, and the call goes to voicemail, the voicemail servers see the source IP as one of the Callmanagers in the ...

Since I seem to be feeling rather talkative today, I figured I'd post a bit on the latest little bit of geekery I committed this week. All noted configuration file examples can be downloaded from here ...