Instruction manual

GLOSSARY
Off-Premises Station (OPS)
Ones
An arrangement provided by the local telephone company which permits remote
Terminal Equipment to operate as though it was directly connected to the System 25.
This tariffed service can only be provided for FCC registered single-line voice
terminals.
Density
In synchronous communications systems where clocking is embedded in the data
stream, a required number of signal transitions must occur in order to accurately
recreate the clock at the far end. In the T1 carrier system, this is known as the ones-
density requirement.
Out-Of-Building Station
The Terminal Equipment is directly connected to the System 25, but is not located in
the same building as the common equipment.
Special arrangements are made to
protect the system and its users from lightning, power line crosses, etc. Only the
single-line and 7300H series of voice terminal may be so connected. MET Sets can
not be connected as Out-Of-Building stations.
Outside Call
A connection between a system user and a party on the public telephone network or
on a tie trunk.
PDC: (Personal Dial Code)
PFT: (Power Failure Transfer)
Paging Trunk
A telecommunications channel used to access an amplifier for
Parameter
Any set of physical properties whose values determine
performance of a system.
loudspeaker paging
the characteristics or
Peripheral Equipment
System Administration Terminal (SAT), SMDR Output device such as a SMDR Printer
or a Call Accounting System, Digital Tape Unit (DTU).
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