Also found in: Acronyms.
control switching point
[kən′trōl ′swich·iŋ ‚pȯint](communications)
A telephone office which is an important switching center in the routing of long-distance calls in the direct distance dialing system. Abbreviated CSP.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.