switched telegraph service
1telegraph — telegrapher /teuh leg reuh feuhr/; esp. Brit., telegraphist, n. /tel i graf , grahf /, n. 1. an apparatus, system, or process for transmitting messages or signals to a distant place, esp. by means of an electric device consisting essentially of a …
2Nippon Telegraph and Telephone — NTT redirects here. For other uses, see NTT (disambiguation). Nippon Telegraph and Telephone Corporation 日本電信電話株式会社 Type Public Traded as TYO …
3Electrical telegraph — A printing electrical telegraph receiver, and a transmitter key at bottom right An electrical telegraph is a telegraph that uses electrical signals, usually conveyed via telecommunication lines or radio. The electromagnetic telegraph is a device… …
4Public switched telephone network — The public switched telephone network (PSTN) is the network of the world s public circuit switched telephone networks. It consists of telephone lines, fiber optic cables, microwave transmission links, cellular networks, communications satellites …
5Packet switched network — A Packet Switched Network, or PSN, refers to the packet switched networks that existed before the Internet. The history of such networks can be divided into three eras:early networks before the introduction of X.25 and OSI,the X.25 era when many… …
6Russian–American Telegraph — Painting of men working on the Collins Overland telegraph line, by John Clayton White. The Russian–American Telegraph, also known as the Western Union Telegraph Expedition and the Collins Overland Telegraph, was a $3,000,000 undertaking by the… …
7Online service provider — An online service provider can for example be an internet service provider, email provider, news provider (press), entertainment provider (music, movies), search, e shopping site (online stores), e finance or e banking site, e health site, e… …
8Mobile Telephone Service — The Mobile Telephone Service (MTS) is a pre cellular VHF radio system that links to the Public Switched Telephone Network (PSTN). MTS was the radiotelephone equivalent of land dial phone service. As of 2005[update], only rural and wilderness… …
9Personal Communications Service — This article is about the mobile phone service type. For the North American Numbering Plan 5XX area codes, see Personal Communications Service (NANP). At the most basic level Personal Communications Service or PCS describes a set of wireless… …
10Maritime Telephone and Telegraph Company — Former MT T Logo Last MTT Logo Maritime Telephone and Telegraph Company ( …
