VOICE FREQUENCY (VF)
Any of the frequencies in the band 300-3,400 Hz which must be transmitted to reproduce the voice with reasonable fidelity.

VOICE GRADE (VG)
An access line suitable for voice, low-speed data, facsimile, or telegraph service. Generally, it has a frequency range of about 300-3000 Hz.

VOICE GRADE FACILITY (VGF)
A circuit designed to DDD network standards which is suitable for voice, low-speed data, facsimile, or telegraph service.

WIDE AREA TELECOMMUNICATIONS SERVICE (WATS)
WATS permits customers to make (OUTWATS) or receive (INWATS) long-distance calls and to have them billed on a bulk rather than individual call basis. The service is provided within selected service areas, or bands, by means of special private access lines connected to the pubic telephone network via WATS-equipped central offices. A single access line permits inward or outward service, but not both.

WIDEBAND (WB)
A term applied to facilities or circuits where bandwidths are greater than that required for one voice channel.

WIRE CENTER (WC)
The physical structure that houses one or more central office switching systems.

"0" or "0-" (AOS)
Zero minus dialing. Allows a caller to dial zero and nothing else to get the Operator.

"0+" (AOS)
Zero plus dialing. An operator assisted long distance call which is charged to the calling party.