ip internet protocol in cheat sheets
Cheat Sheet: BT's 21CN
Cheat Sheet It's the largest overhaul of BT's core network to date - instead of using traditional PSTN (pubic switched telephone network) lines to shunt traffic across the network, it's switching to a single, all-IP (internet protocol) network instead, which... [14 Nov 2006]
Cheat Sheet: VoIP
Cheat Sheet It's short for Voice over Internet Protocol. It's also called internet telephony or IP telephony. BT recently announced plans to switch to an all-IP infrastructure by 2008, perhaps the most dramatic commitment to the technology by any major telco. [15 Jun 2004]
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