ringdown

(redirected from Automatic ringdown circuit)

ringdown

[′riŋ‚dau̇n]
(communications)
In telephone switching, that method of signaling an operator in which telephone ringing current is sent over the line to operate a drop or a self-locking relay and lamp.
References in periodicals archive ?
This new offering enables our traders to interact with our clients, accessing all critical turret functionality, including automatic ringdown circuits as if they were at their desks.

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