public telephone service (PTS)

Ordinary telephone services in which a customer has a connection to a central office and can be connected to any other customer of the service. Sometimes called plain old telephone service (POTS).; 各用戶與電話局相連并能與其服務所及的其它用戶接通的普通電話業務。有時也叫普通老式 電話服務(POTS)。參閱basic service。