Instruction manual

GLOSSARY
Personal Dial Code
Each system user is assigned a PDC and is allowed to “sign in” the PDC at any voice
terminal in the system as he or she moves about the premises. The PDC may be a 1-,
2-, 3-, or 4-digit number. There are two types of PDCs:
● PDCs assigned to voice terminals -
Associated with each voice terminal in the
system.
● Floating PDCs (FPDCs) -
Assigned to visitors and those users who do not
have exclusive use of a voice terminal.
An FPDC may be signed in by its
owner at any system voice terminal. Calls to the FPDC will ring at the terminal
where it is signed in.
Calls to an FPDC that is not signed in anywhere will
either receive reorder tone or be directed to the attendant (administrable).
Pickup Group
A group of individuals authorized to answer any call directed to an extension number
within the group.
Port
An interface circuit between System 25 and associated auxiliary and peripheral
equipment. Typical references include:
● Terminal port (station port)
● Facility port (trunk port)
● Auxiliary equipment port
Private Branch Exchange (PBX)
A switching system that provides switched communications access amongst its
terminals and facilities (e.g., System 25)
Private Network
A network used exclusively for handling the telecommunications needs of a particular
customer.
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.
Protocol
A set of conventions or rules governing the format and timing of message exchanges
to control data movement and correction of errors.
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