public switched telephone network (pstn)
101Asterisk (PBX) — infobox software name = Asterisk developer = Digium latest release version = 1.4.22 latest release date = release date|2008|10|02 latest release version = 1.6.0 latest release date = Oct 2, 2008 programming language = C operating system = Cross… …
102Demarcation point — Dmark redirects here. For the German currency, see Deutsche Mark. Old and new style demarcation points in a Canadian home built in 1945. A splitter for a DSL modem has been plugged into the modern demarc (on the right). One line passes through a… …
103Dial-on-demand routing — (DDR) is a routing technique where a network connection to a remote site is established only when needed. In other words, if the router tries to send out data and the connection is off, then the router will automatically establish a connection,… …
104Project 25 — (P25 or APCO 25) is a suite of standards for digital radio communications for use by federal, state/province and local public safety agencies in North America to enable them to communicate with other agencies and mutual aid response teams in… …
105Q-Telecom — ( Former Mobile Network Code: 202 09 ) was the fourth mobile telephony provider in Greece. It was the latest entrant into the market and started its operation in June 2002. The company developed a GSM, LMDS and a backbone network in Greece, and… …
106Session Initiation Protocol — The Session Initiation Protocol (SIP) is a signalling protocol, widely used for setting up and tearing down multimedia communication sessions such as voice and video calls over the Internet. Other feasible application examples include video… …
107Western Electric — Infobox Defunct Company company name = Western Electric Co., Inc. company fate = Absorption successor = AT T Technologies foundation = 1872 defunct = 1995 location = New York, NY, USA industry = Telecommunications key people = products = Customer …
108Carterfone — The Carterfone is a device invented by Thomas Carter. It connects a two way mobile radio system to the Public Switched Telephone Network (PSTN). The device was acoustically, but not electrically, connected to the Public Switched Telephone Network …
109Direct inward dialing — (DID), also called direct dial in (DDI) in Europe and Oceania, is a feature offered by telephone companies for use with their customers private branch exchange (PBX) systems. In DID service the telephone company provides one or more trunk lines… …
110Dial-up Internet access — is a form of Internet access that uses the facilities of the public switched telephone network (PSTN) to establish a dialled connection to an Internet service provider (ISP) via telephone lines. The user s computer or router uses an attached… …
