Encyclopedia > Essential service

Article Content

Essential service

In telecommunication, an essential service is a network-provided service feature in which a priority dial tone is furnished.

Note 1: Essential service is typically provided to fewer than 10 % of network users.

Note 2: Essential service is recommended for use in conjunction with NS/EP telecommunications services. Synonym critical service.

Source: from Federal Standard 1037C

All Wikipedia text is available under the terms of the GNU Free Documentation License

Search Encyclopedia

Search over one million articles, find something about almost anything!

Featured Article

Charles V, Holy Roman Emperor

... Spain September 21, 1558) was Holy Roman Emperor (as Charles V) from 1519-1558; he was also King of Spain from 1516-1556 -- officially as Charles I of Spain, although ...