Compelled Signaling
Compelled signaling refers to signaling where receipt of each signal from an originating register needs to be explicitly acknowledged before the next signal is able to be sent.
Most forms of R2 register signaling are compelled (see R2 signaling), while R1 multi-frequency signaling is not.
The term is only relevant in the case of signaling systems that use discrete signals (e.g. a combination of tones to denote one digit), as opposed to signaling systems which are message-oriented (such as SS7 and ISDN Q.931) where each message is able to convey multiple items of information (e.g. multiple digits of the called telephone number).
Read more about this topic: Signaling (telecommunications)
Famous quotes containing the word compelled:
“How vigilant we are! determined not to live by faith if we can avoid it; all the day long on the alert, at night we unwillingly say our prayers and commit ourselves to uncertainties. So thoroughly and sincerely are we compelled to live, reverencing our life, and denying the possibility of change. This is the only way, we say; but there are as many ways as there can be drawn radii from one centre. All change is a miracle to contemplate; but it is a miracle which is taking place every instant.”
—Henry David Thoreau (1817–1862)