Verizon Communications announced a deal with Nortel Networks on Tuesday, the latest carrier moving to add packet-switching technology to its voice network. Other carriers are also slowly moving toward ...

As we mentioned last time, there was an entire industry built around using TDM bandwidth efficiently due to the compelling economics of building corporate private-line networks. By the late 1980s, ...

Circuits as WAN connections battled successfully against packets for years because they guaranteed bandwidth, no matter what. If you bought a T-1 circuit, the service provider nailed up 1.5Mbps from ...

As I finished last week's column on packet switching, a "teachable moment" took place (well, more of a "writable moment"), and it serves to illuminate another aspect of the Internet that remains the ...

You may recall that Ethernet networks are based on a protocol calledCarrier Sense Multiple Access with Collision Detection, commonly knownas CSMA/CD. This means that data packets from the various ...

Telecommunications service provider Verizon Communications has begun using an Asynchronous Transfer Mode (ATM ) backbone to carry some voice calls, a step in the carrier’s first migration to a new ...

Verizon Communications this week announced plans to shift its nationwide telecommunications network to packet-switched technology as part of a plan to offer new voice-over-IP and multimedia services.