local first selector

local first selector

[′lō·kəl ¦fərst si¦lek·tər]

(communications)

The second portion of a line that connects to a calling line, through a line primary switch, to a local second selector and special service second selector, and returns a dial tone to the calling subscribers.

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