Instruction manual

GLOSSARY
Switch
The software-controlled communications processor complex that interprets dialing
pulses/tones/key board characters and makes the proper interconnections both within
the system and external to the system.
The switch itself consists of a digital
computer, software, storage device (memory), and associated circuit packs and
special hardware necessary to perform the actual connections.
Switchhook
The button(s) on a voice terminal located under the handset.
Synchronization
Coordinated timing whereby all switches, channel banks, and multiplexer operate
from the same stable clock reference. The process assures that the transmit and the
distant receive node achieve proper bit alignment.
System Administrator
A person responsible for specifying and administering features and services for the
system.
System Restore
A process that allows stored data to be written from a tape or PC file into the system
memory.
T1
The T1 carrier system is a high speed, time division multiplexed, digital transmission
facility capable of transmitting voice and data at 1.544 Mbps. In System 25, T1 can
replace up to 24 analog trunks,
offering improved quality, cost savings, and
enhanced features.
TAE: (Trunk Access Equipment)
Terminal Equipment:
Equipment for changing information (sound, keystrokes) into an electrical signal
compatible with the system’s port circuits (voice and data terminals are two
subdivisions).
Tie Trunk
A telecommunications channel that directly connects two private switching systems.
Time Division Multiplex Bus
A special bus that is time shared by preallocating short time slots to each transmitter
on a regular basis.
In a PBX, all port circuits are connected to the time division
multiplex bus permitting any port to send a signal to any other port.
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