Acronym for foreign instrumentation signals intelligence.

A telephone service that allows individuals to receive, via a single number, telephone calls in various locations (e.g., home, office, or car phone) from call originators not necessarily using the same common carrier.

In personal communications service (PCS), terminal access to a network in which there is a set relationship between a terminal and the access interface.
Note: A single "identifier" serves for both the access interface and the terminal. If the terminal moves to another access interface, that terminal assumes the identity of the new interface.

See pad.

A service feature that permits an attendant on an assisted call to retain connection through the attendant position for the duration of the call.
Note: The attendant will usually receive a disconnect signal when the call is terminated.

A fixed station used in connection with (a) the alignment of microwave transmitting and receiving antenna systems and equipment, (b) coordination of microwave radio survey operations, and (c) cue and contact control of television pickup station operations. [47CFR]

A radiocommunication service between specified fixed points. [NTIA] [RR] [47CFR]

1. A station in the fixed service. [NTIA] [RR] [47CFR]
2. The term "fixed station" in the fixed public or fixed public press service includes all apparatus used in rendering the authorized service at a particular location under a single instrument of authorization. [47CFR]

Synonym read-only storage.

Modulation in which the significant condition for any signal element is based on a fixed reference.