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NID
NM
NN
node
Nonfacility-associated
signaling (NFAS)
NPA
NPE
NQC
NSE
NSU
null modem cable
NXX
OA
occurrence
OCM
offered load
ONS
OPS
OPX
Network Inward Dialing
Network management
National number
A switching or control point for a network. Nodes are either tandem (they receive
signals and pass them on) or terminal (they originate or terminate a transmission
path).
A method that allows multiple T1 and/or E1 facilities to share a single D-channel to
form an ISDN-PRI. If D-channel backup is not used, one facility is configured with a
D-channel, and the other facilities that share the D-channel are configured without
D-channels. If D-channel backup is used, two facilities are configured to have D-
channels (one D-channel on each facility), and the other facilities that share the D-
channels are configured without D-channels.
Numbering-plan area
Network processing element
Number of queued calls
Night-service extension
Network sharing unit
Special wiring of an RS-232-C cable such that a computer can talk to another
computer (or to a printer) without a modem.
Public-network office code
Operator assisted
See
appearance
on page 389.
Outbound Call Management
The traffic that would be generated by all the requests for service occurring within a
monitored interval, usually one hour.
On-premises station
Off-premises station
Off-premises extension
Issue 1.0 May 2003
OPX
419
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