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Glossary:
Installation and Upgrades for G700 with S8300 or S8700
555-234-100 — Issue 3 — May 2003
355
packet
A group of bits that is used in packet switching and that is transmitted as a discrete unit. A packet includes a message
element and a control information element (IE). The message element is the data. The control information element is the
header. In each packet, the message element and the control IE are arranged in a specified format. See also
information
element (IE); packet switching.
packet assembly/disassembly (PAD)
The process of packetizing control data and user data from a transmitting device before the data is forwarded through the
packet network.The receiving device disassembles the packets, removes the control data, and then reassembles the
packets, thus reconstituting the user data in its original form.
packet bus
A wide-bandwidth bus that transmits packets.
packet switching
A data-transmission technique that segments and routes user information in discrete data envelopes that are called
packets. Control information for routing, sequencing, and error checking is appended to each packet. With packet
switching, a channel is occupied only during the transmission of a packet. On completion of the transmission, the channel
is made available for the transfer of other packets. See also
BX.25; packet; packet assembly/disassembly (PAD);
packet bus.
PAD
See
packet assembly/disassembly (PAD).
paging trunk
A telecommunications channel that is used to access an amplifier for loudspeaker paging.
party/extension active on call
A person who is actually connected to a call, either in an active talk state or in a held state. An originator of a call is
always a party on the call. Alerting parties, busy parties, and tones are not parties on the call.
PBX
Private branch exchange
PCI
See
Peripheral Component Interconnect (PCI).
PCM
See
pulse-code modulation (PCM).
PCOL
See
personal central office line (PCOL).
PCOLG
Personal central office line group
PCR
Peak cell rate
PCS
Permanent switched calls
PDM
See
processor data module (PDM).
PDS
See
Premises Distribution System (PDS).
PE
(1) Processing element; (2) PRI endpoint. See
PRI endpoint (PE).