Avaya MERLIN MAGIX Maintenance And Troubleshooting Manual page 295

Maintenance and Troubleshooting
PFT
Power Failure
during a commercial power failure by switching some of the system's line/trunk
connections to telephones connected to specially designated extension jacks.
Phantom Extension
Extension that is not actually plugged into the system, but is used, for example,
as a calling group member covered by a
Pool
In
Pool button or by dialing an access code on
feature when choosing the least expensive route for a call.
Point-to-Point Facility
In a
switching capabilities of the PSTN.
Port
See Jack. Also, refers to
numbered according to the
module is always Port 1.
Power Failure Transfer
See PFT.
Power Supply Module
Device that directs electricity to modules and telephones on the system. One
power supply module is needed for each carrier.
PRI
Primary Rate
between two or more communications systems. As used in North America, it
provides twenty-three 64-kbps
D-Channel, which carries multiplexed signaling information for the other 23
channels.
Primary System Operator Position
First extension
the extension jack with the lowest logical ID in the system.
Prime Line
Individual extension number assigned to a telephone in a system operating in
Behind Switch
automatically connected to that line when he or she lifts the handset.
GL-28
Transfer. Feature that provides continuity of telephone service
Hybrid/PBX Mode, a group of outside lines/trunks that users can access with a
Private Network, a line/trunk that passes through the
Interface. Standard interface that specifies the protocol used
Jack on the first TDL or MLX module in the control unit–that is,
Mode. Each telephone user has his or her own prime line and is
Voice Messaging
SA
Extension or Line/Trunk Jack
Dial Plan during programming. The lowest jack on a
B-Channels for voice and/or data and one 16-kbps
Interface.
buttons. Also used by the
PSTN without using the
before these are
ARS