Synonym comma-free code.

In communications systems, assembling a number of narrowband channels, such as 4-kHz-wide telephone channels, into a specified frequency band such that, after pregroup translation, they may be formed with other pregroups into a standard group, such as an ITU-T basic group, by frequency-division multiplexing. [From Weik '89]

In communications systems, the process of transposing, in frequency, a pregroup of channels, such as telephone or data channels, in such a manner that they may be formed into a standard group, such as a CCITT (an ITU-T) basic group, by frequency-division multiplexing. [From Weik '89]

In radio transmission, a call that (a) includes at least the identification of the calling station and the called station, (b) is designed to establish communications with a particular station, and (c) usually includes a request to the called station to reply, although the request may be implied by the recitation of the call signs. [From Weik '89]
Note: A… (Read More →)

The termination of an established connection, where the termination is not initiated by either of the connected end-users. [Tl-507-1996]

The untimely occurrence of an event or a combination of events that, according to the protocol, should result in a disconnection. In addition, the occurrence of one or more of the following criteria generated between the portion boundaries is defined to be a premature disconnect stimulus: (a) bit error ratio worse than 10nb, for Xb number of consecutive observation periods… (Read More →)

See on-premises wiring.

Synonym precombining.

In telephony, a low-level artificial noise introduced into the receiver to indicate that the connection is still in effect, even though no voice sound is being transmitted (no one is speaking) or no voice sound is audible. [Mattila]

An association of an abstract syntax with a transfer syntax. [T1.208-1989]