Alcatel-Lucent 1643 AMS User's Operation Manual page 702

Glossary
OSI
Open Systems Interconnection
OW
(Engineering) Order Wire
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P PABX
Private Automatic Branch eXchange
Paddle Board - Peripheral Control and Timing link (PB-PCT)
A small circuit board used in a 5ESS exchange for protection switching and optical to
electrical conversion of the PCT-link.
Path
A logical connection between one termination point at which a standard format for a
signal at the given rate is assembled and from which the signal is transmitted, and
another termination point at which the received standard frame format for the signal is
disassembled.
Path AIS
Path Alarm Indication Signal - A path-level code that is sent downstream in a digital
network as an indication that an upstream failure has been detected and alarmed.
Path Overhead (POH)
The Virtual-Container Path Overhead provides integrity of communication between the
point of assembly of a Virtual Container and its point of disassembly.
Path Terminating Equipment
Network elements in which the path overhead is terminated.
PC
Personal Computer
PCB
Printed Circuit Board
PCM
Pulse Code Modulation
PCT-link
Peripheral Control and Timing-link
PDH
Plesiochronous Digital Hierarchy
Peer ITM-SC
ITM-SC at the other end of the peer-to-peer link.
Peer to Peer link
Connection between two ITM-SCs with Geographic Redundancy. The link is used to
co-ordinate the management of a network element. See also Geographic Redundancy.
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GL-22 Alcatel-Lucent - Proprietary
See notice on first page
365-312-807R7.2
Issue 4, May 2007