Instruction manual

GLOSSARY
Primary/Secondary D-Channel
The D-Channel Backup feature requires that one D-Channel be administered as the pri-
mary D-Channel, and that a second D-Channel be administered as the secondary D-
Channel. The reason for this distinction is that at certain times during the D-Channel
Backup procedures, both D-Channels are in the same state, and it is imperative in order
to avoid a deadlock situation that both switches at opposite ends of the PRI select the
same D-Channel to be put into service. In these case, the primary D-Channel is given
precedence over the secondary D-Channel.
Principal (User)
In terms of Call Coverage, a person for whom a call was originally intended.
Priority Queuing
An entry is provided in the COR to allow priority queuing. The queuing priority of a call
can be raised such that when a call with increased priority is queued, it is queued ahead
of calls of normal priority. This priority queuing is for non-vector controlled calls and
non-direct-agent calls.
Private Networking
A Private Network is a network of customer switches linked with private lines that carry
voice and data communication throughout the network. A Private Network is character-
ized by a uniform numbering plan that includes the assignment of a unique number to
each station in the network The Automatic Alternate Routing (AAR) Analysis table is
used to route private network calls.
Private Network Office Code (RNX)
The first three digits of a 7-digit private network number. These codes are numbered 220
through 999, excluding any codes that have a 0 or 1 as the second digit.
Privileged Station
A station that has been administered with console privileges allowing it to perform func-
tions normally associated with an attendant.
Processor Data Module (PDM)
Provides the required interface between the system and an Electronics Industries Associ-
ation (EIA) computer or data terminal.
Processor Port Network (PPN)
The cabinet in which the switch processor resides. Only one of these per switch is
allowed.
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