In data communications systems, control of the rate at which data are transmitted from a terminal so that the data can be received by another terminal.
Note 1: Transmit flow control may occur between data terminal equipment (DTE) and a switching center, via data circuit-terminating equipment (DCE), or between two DTEs. The transmission rate may be controlled because of network… (Read More →)

The ratio in dB of the sound pressure produced by a speaker to the voltage produced by a telephone and loop as defined by ANSI/IEEE 661-199
7. [T1.255-1997]

The signal sent across an interface la or lb from the associated equipment. [T1.408-1990]

The time interval from removal of rf energy at the local receiver input until the local transmitter is automatically keyed on and the transmitted rf signal amplitude has increased to 90% of its steady-state value. An Exception: High-frequency (HF) transceiver equipment is normally not designed with an interlock between receiver squelch and transmitter on-off key. The transmitter can be keyed… (Read More →)

The ratio of the transmitted power to the incident power.
Note 1: In optics, transmittance is usually expressed as optical density or in percent.
Note 2: Transmittance was formerly called "transmission. "

The source or generator of any signal on a transmission medium. [T1.408-1990]

The interval from the instant a transmitter is keyed-on to the instant the transmitted radio frequency (rf) signal amplitude has increased to a specified level, usually 90% of its key-on steady-state value.
Note: The transmitter attack-time delay excludes the time required for automatic antenna tuning.

In optical communication, the total allowed range of transmitter central wavelengths caused by the combined worst-case variations due to manufacturing, temperature, aging, and any other significant factors.

The power output of a radio transmitter under stated conditions of operation and measurement.
Note: Power output ratings may be made against a number of criteria, e.g., peak envelope power, peak power, mean power, carrier power, noise power, or stated intermodulation level.