The overhead added to the STS SPE (synchronous transport signal -- synchronous payload envelope) for transport purposes. Transport overhead consists of line and section overhead. [T1.105-1988]

1. In communications, the quality of equipment, devices, systems, and associated hardware that permits their being moved from one location to another to interconnect with locally available complementary equipment, devices, systems, associated hardware, or other complementary facilities.
Note: Transportability implies the use of standardized components, such as standardized plugs and transmission media.
2. The capability of materiel to be moved… (Read More →)

A station which is transferred to various fixed locations but is not intended to be used while in motion. [NTIA]

In INFOSEC, encryption that rearranges bits or characters according to some scheme. [2382-pt.8]
Note: The resulting ciphertext is called transposition cipher. [2382-pt.8]

A mode whose electric field vector is normal to the direction of propagation.
Note: TE modes may be useful modes in waveguides. In an optical fiber, TE and TM modes correspond to meridional rays.

A mode whose electric and magnetic field vectors are both normal to the direction of propagation.
Note: The TEM mode is the most useful mode in a coaxial cable.

A mode whose magnetic field vector is normal to the direction of propagation.
Note: TM modes may be useful in waveguides. In an optical fiber, TE and TM modes correspond to meridional rays.

Synonym lateral offset loss.

A parity check performed on a group of binary digits recorded on parallel tracks of a data medium, such as a magnetic disk, tape, drum, or card. [From Weik '89]

In synchronized parallel bit streams, a redundancy check (a) that is based on the formation of a block check following preset rules, (b) in which the check-formation rule applied to blocks is also applied to characters, and (c) in which the check is made on parallel bit patterns.
Note 1: When the TRC is based on a parity bit applied… (Read More →)