As Peter Amstein squeezes through a warren of equipment racks draped with wire and crammed with whirring machines, he offers a cheerful warning. "There are exposed electrical terminals, probably ...

Editorial Note: We earn a commission from partner links on Forbes Advisor. Commissions do not affect our editors' opinions or evaluations. A private branch exchange (PBX) is a telephone system that ...

Imagine this: your chest tightens, breathing becomes difficult, and you know something isn’t right. You reach for your phone, dial 9-1-1, and within moments, help is on the way. But what happens ...

Peter Amstein, a volunteer who serves as president of the Connections Museum board, says early phone technology shaped his IT career. (L. Tremaine) As Peter Amstein squeezes through a warren of ...