point of presence
(PoP) A site where there exists a collection of
telecommunications equipment, usually {modems}, digital leased
lines and {multi-protocol routers}. An {Internet access
provider} may operate several PoPs distributed throughout
their area of operation to increase the chance that their
subscribers will be able to reach one with a local telephone
call. The alternative is for them to use {virtual PoPs}
(virtual points of presence) via some third party.
(1994-12-13)