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DEFINITY ECS Release 8.2
Administrator’s Guide
555-233-506
Issue 1
April 2000
Glossary and abbreviations
1648
OSHA
Occupational Safety and Health Act
OSI
Open Systems Interconnect
OSS
Operations Support System
OSSI
Operational Support System Interface
OTDR
Optical time-domain reflectometer
othersplit
The work state that indicates that an agent is currently active on another split’s call, or in ACW for another
split.
OTL
Originating Test Line
OTQ
Outgoing trunk queuing
outgoing gateway
A PBX that routes an incoming call on a trunk administered for Supplementary Services Protocol B to a trunk
not administered for Supplementary Services Protocol B.
P
PACCON
Packet control
packet
A group of bits (including a message element, which is the data, and a control information element (IE),
which is the header) used in packet switching and transmitted as a discrete unit. In each packet, the message
element and control IE are arranged in a specified format. See also packet bus
and packet switching.
packet bus
A wide-bandwidth bus that transmits packets.
packet switching
A data-transmission technique whereby user information is segmented and routed in discrete data envelopes
called packets, each with its own appended control information, for routing, sequencing, and error checking.
Packet switching allows a channel to be 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
and packet.
PAD
Packet assembly/disassembly
paging trunk
A telecommunications channel used to access an amplifier for loudspeaker paging.