harmonic selective ringing

harmonic selective ringing

[här′män·ik si¦lek·tiv ′riŋ·iŋ]

(communications)

Selective ringing which employs currents of several frequencies and ringers, each tuned mechanically or electrically to the frequency of one of the ringing currents, so that only the desired ringer responds.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.