Here is a great introduction to a practical application of electromagnetic theory—the field telephone. It’s a training film from 1961 that covers the sound-powered, local battery, and common battery ...

The basic concept is a virtual telephony solution offering advanced features typically associated with a PBX, delivered as a service. 2) Cloud Applications Using the cloud to solve for specific ...

In any small business, the telephone is a lifeline to success. Yet, for many small equipment rental businesses, the telephone is seen as a nuisance. It seems to ring at all the wrong times, and the ...

A telephone is a device designed to conduct simultaneous transmission and reception of voice over a network. It is the most widely used telecommunications medium in the world since 1876. Since its ...

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 ...

As a Linux Journal reader, you've probably stumbled across Google Android here and there. You've probably read an introductory article or maybe you even downloaded an ...