Today, we’d like to get back to a few basics about the relationship between the public-switched telephone network and voice over IP. The PSTN includes a signaling system, a series of central offices ...

Last week I wrote about the technical aspects of dial-out to PSTN phones, now I would like to take a look at the costs of such calls. Of course, these vary widely based on where you are calling to, ...

As thirty-year telecom veterans, we’ve seen our share of changes in the Public Switched Telephone Network (PSTN) that includes the replacement of electromechanical switches with digital switching, the ...

I've had a phone line free household since I first got a cell phone. Being free from the wires works fairly well, but it has some limitations. To me the cellular phone is like a personal accessory, so ...

The main difference between traditional phone systems and VoIP systems is circuit switching versus packet switching. The public switched telephone network (PSTN) uses circuit switching to carry your ...

Update: this post contains corrected information, based on additional data sent to us by Keynote Systems. Keynote Systems is out with a five-week study that claims VoIP reliability and audio quality ...

While the consumer “landline replacement” VOIP battles continue to wage (the cable companies now control over 70% of that market, and Vonage is still fighting), a number of nimble software-only ...

Upcoming PSTN Switch Off dates December 2025 – date the PSTN was due to be switched off January 31 2027 – new date that all home or phone calls will be made via a VoIP-based system (What is VoIP?) ...

Minacom says its tests were conducted over PSTN, managed broadband and cable VoIP lines, the same services offered to residential and enterprise customers by phone, cable and hosted VoIP providers.

Is enterprise VoIP (voice over IP) due for a security wakeup call or are the threats mostly exaggerated? It depends on who’s talking. “The security aspects of enterprise VoIP have been overblown,” ...