- Choke exchange
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A choke exchange is a telephone exchange designed to limit the effect of high numbers of simultaneous call attempts to that exchange. The choke exchange is connected to other exchanges in such a way that even high call volume will be handled through the "choke" connection rather than overwhelming the rest of the local telephone network. Typical phone numbers on choke exchanges include radio station contest lines[1] and event ticket vendors.
Examples of choke exchanges in North America have included:
- (202) 432-#### in Washington, DC
- (213) 520-#### and (818) 520-#### in Los Angeles, California[2]
- (312) 591-#### in Chicago, Illinois[2]
- (313) 298-#### in Detroit, Michigan
- (415) 478-#### in San Francisco, California[2]
- (416) 870-#### and (416) 872-#### in Toronto, Ontario[3]
- (614) 821-#### in Columbus, Ohio
- (513) 749-#### in Cincinnati, Ohio
- (514) 790-#### in Montreal, Quebec
- (585) 222-#### in Rochester, New York
- (604) 280-#### in Vancouver, British Columbia[3]
- (613) 750-#### in Ottawa, Ontario
- (704) 570-#### in Charlotte, North Carolina
- (714) 977-#### in Orange County, California[2]
References
- ^ Higdon, John (1989-09-25 07:04:41 GMT). "Re: Prefix '520' For Los Angeles Radio Stations". comp.dcom.telecom. (Web link).
- ^ a b c d Higdon, John (1989-09-22 08:33:25 GMT). "Re: Prefix '520' For Los Angeles Radio Stations". comp.dcom.telecom.
- ^ a b Leibold, David (1990-11-24). "TELECOM Digest Guide to Special Prefixes/Numbers". TELECOM Digest mailing list. http://massis.lcs.mit.edu/archives/technical/test.numbers. Retrieved 2010-11-05.
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