(DHSD) A term which describes a full-duplex channel that can carry 64 kilobits per second.

This is the kind of service provided by an Inmarsat-B type portable earth station or a leased line (not ISDN).

Last updated: 1995-02-02

Nearby terms:

hich only ever carries a signal in onetable earth station or a {leased line} (not {ISDN}).

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