The signal that the telephone receiver has been lifted
(activated). Originating off hook activates a dial tone
on switched networks. Destination off hook completes
a call (and activates minute-by-minute billing for long
distance calls).
One Plus - 1+
Customer ability to access the long distance service
provider of their choice by first dialing 1, then the
long distance number. Equal Access guaranteed by the
1982 AT&T MFJ. 1+ is an outbound service where the
calling station pays the charges.
Open Video Systems
An alternative method to provide cable-like video
service to subscribers.
Operator Service Call - OSC
A call that is placed through a human or automated
operator (0+).
