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The Wayback Machine - https://web.archive.org/all/20050209213706/http://usatalkcheap.com:80/telecom-glossary-mn.html
Telecom Glossary MN
Must-Carry (Retransmission)
A 1992 Cable Act term requiring a cable system to
carry signals of both commercial and noncommercial
television broadcast stations that are
"local" to the area served by the cable system.
NPA Area Codes, NXX Exchanges and XXXX Line
Numbers
The process for assigning 10-digit (3+3+4) North American
telephone numbers
NASC - 800 Number Administration and Service
Center
The organization that administers the SMS/800 system
for the reservation, registration and administration
of all North American 800 numbers for all carriers.
(See 800 Portability, RespOrg and SMS/800)
Network
>Any connection of two or more computers that enables
them to communicate. Networks may include transmission
devices, servers, cables, routers and satellites.
The phone network is the total infrastructure for
transmitting phone messages.