An interface through which information flow is partitioned into physical, periodic frames consisting of overhead information and an information payload.

1. In time-division multiplexing reception, synonym frame synchronization.
2. In video reception, the process of adjusting the timing of the receiver to coincide with the received video synchronization pulse.
3. In facsimile, the adjustment of the facsimile picture to a desired position in the direction of line progression.

1. A bit used for frame synchronization.
2. In a bit stream, a bit used in determining the beginning or end of a frame.
Note 1: The framing bit occurs at a specific position in the frame.
Note 2: In a bit stream, framing bits are noninformation bits.
Note 3: Framing in a digital signal is usually repetitive.

See frame-alignment signal, framing bit.

Synonym far-field diffraction pattern.

Synonym far-field region.

A radio net in which any station may communicate with any other station in the net without first obtaining the permission of the net-control station.
Note: Permission to operate as a free net is granted by the net-control station until such time as a directed net is established by the net-control station. [From Weik '89] See [for Internet systems] freenet.

The routing of messages in such a manner that they are forwarded toward their destination or addressee over any available channel without dependence upon predetermined routing. [From Weik '89]

A theoretical concept of space devoid of all matter.
Note: Free space also implies remoteness from material objects that could influence the propagation of electromagnetic waves.

In a synchronized oscillator, the capability to operate in the absence of a synchronizing signal.