The NANP dial plan has been discussed in the past four blogs. By default, Cisco Unified Communications Manager (CUCM) does not know how to route any calls to the PSTN based on the NANP or any other ...

• 9.0 PSTN operator Most organizations have, and continue to use, a 9 to access an outside line. When a 9 is dialed, a secondary dial tone (stutter tone) is heard. Some legacy PBX (private branch ...

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

The new Cisco CallManager Express, a scaled-down version of Cisco's CallManager call processing software for larger enterprise customers, focuses on features most attractive to offices with fewer than ...

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 ...

Upgrading ahead of the deadline allows organizations to manage the process and avoid operational risks. Our team specializes in ensuring migrations are smooth, secure, and aligned with business needs” ...