Science Fair Project Encyclopedia
Essential service
In telecommunication, an essential service (critical service) is a network-provided service feature in which a priority dial tone is furnished. Essential service is typically provided to fewer than 10 % of network usersm, and recommended for use in conjunction with NS/EP telecommunications services.
References
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details


