Such has been the success of the mobile phone that in many places they have ... [Hans Gelke] gave a talk on the analog exchange he’s created from scratch. The basic form of the circuit is ...

555 was an exchange combination that was not used very often in the American telephone system. You may get a wrong number, or no number at all. Narrator: An FCC contractor called the NANPA ...

This guide was reviewed by a Business News Daily editor to ensure it provides comprehensive and accurate information to aid your buying decision. To determine which private branch exchange (PBX ...

One of the most modern private automatic branch telephone exchanges in the United States was placed in operation recently at the International Falls plant. Installed, ...

Despite this the Telephone Exchange has secured its place within the history of this island’s architecture and the Irish telecommunication system, but as of yet, it is not on Galway’s Record ...

While telephonists around the world were broadly known as "Hello Girls", Ms Hastwell and her colleagues adopted their unique name from the manual telephone exchange's users. "When the [exchange ...