P - Q
- packet switching.
An efficient method for breaking down and handling high-volume traffic in a network; a transmission technique that segments and routes information into discrete units.
- parity check.
An error-checking scheme that examines the number of transmitted bits in a block that hold the value 1; for even parity, an overhead parity bit is set to either 1 or 0 to make the total number.
- path.
A logical connection between the point where an STS or VT is multiplexed up to the point where it is demultiplexed.
- payload.
The portion of the SONET or SDH signal available to carry service signals, such as DS-1 and DS-3; the contents of an STS SPE or VT SPE.
- payload pointer.
Indicates the beginning of the synchronous payload envelope (SPE).
- photon. ...
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