This vendor-written tech primer has been edited by Network World to eliminate product promotion, but readers should note it will likely favor the submitter’s approach. IT managers often think of ...

SIP Trunk offnet calls (placed to or from a PSTN connection, or calls that transit the PSTN in part) are more numerous than most IT Directors assume. Here, having facts at your fingertips is essential ...

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 ...

Back in the days of wireline telephony, when all phone calls went over the Public Switched Telephony Network (PSTN), businesses would purchase “trunks” -dedicated lines or a bundle of circuits – from ...

The PSTN’s transition from legacy TDM technology to IP is coming. It is inevitable. But there are many things that operate over the PSTN that have to be supported. None of these are a deal breaker, ...