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MDR Glossary
Administration for Network Connectivity
CID: 77730 555-233-504 — Issue 1 — April 2000
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MDR
Message detail record.
MIB
See Management Information Base (MIB).
MMCH
Multimedia call handling.
MSA
Message Server Adjunct.
multicasting
A transmission method that promotes efficient bandwidth utilization on a
multimedia data network when several parties are transmitting and receiving
simultaneously. Normally, each party sends a separate video stream to each of
the other parties and receives a separate video stream from each in return (this is
called unicasting). Multicasting substitutes a single broadcast transmission
(addressed to all parties) for the separate transmissions addressed to each. Each
party then continues to receive multiple data streams while sending only one.
For best results, multicast messages should be restricted to one or more subnet.
N National Television Standards Committee (NTSC) standard
The standard format and transmission method for television signals in North
America, Central America, and Japan. The NTSC is a division of the Electronic
Industries Association (EIA). MMCX video transmissions conform with NTSC
requirements.
national number
The full dialed number minus the country code. The national number is
composed of office code plus subscriber code. In North America, this means
area code plus seven digits. For example, 303-538-1234 is a national number.
NCA/TSC
Noncall-associated/temporary-signaling connection.
NCOSS
Network Control Operations Support Center.
NCSO
National Customer Support Organization.
NEC
National Engineering Center.