See synchronous orbit.

A transmission control character used in synchronous transmission systems to provide a signal from which synchronism or synchronous correction may be achieved between data terminal equipment, particularly when no other character is being transmitted.

1. A network in which clocks are controlled to run, ideally, at identical rates, or at the same mean rate with a fixed relative phase displacement, within a specified limited range.
Note: Ideally, the clocks are synchronous, but they may be mesochronous in practice. By common usage, such mesochronous networks are frequently described as "synchronous. "
2. A network in… (Read More →)

See SONET.

Any orbit in which an orbiting object has a period equal to the average rotational period of the body being orbited, and in the same direction of rotation as that body.
Note 1: A synchronous orbit need not be equatorial, but it usually is, ideally. A body in a nonequatorial synchronous orbit will, when observed from a fixed point on… (Read More →)

Payloads derivable from a network transmission signal by removing integral numbers of bits in every frame, i.e., there are no variable bit stuffing rate adjustments required to fit the payload in the transmission signal. [T1.105-1988]

A satellite in a synchronous orbit.

A system in which events, such as signals, occur in synchronism.
Note 1: An example of a synchronous system is one in which a transmitter and receiver operate with a fixed time relationship.
Note 2: A second example is SONET, which may accommodate payload signals in channels that are clocked at submultiples of the carrier clocking rate. [T
1. X1]

A transcoding of the form ADPCM-PCM-ADPCM (adaptive differential pulse code modulation-pulse code modulation-adaptive differential pulse code modulation) when there are no transmission errors and the integrity of the bit stream is preserved. [T1.310-1991]

A multiplexing scheme in which timing is obtained from a clock that controls both the multiplexer and the channel source.