Pertaining to those frequencies within that part of the audio range that is used for the transmission of speech.
Note 1: In telephony, the usable voice-frequency band ranges from approximately 300 Hz to 3400 Hz.
Note 2: In telephony, the bandwidth allocated for a single voice-frequency transmission channel is usually 4 kHz, including guard bands. Synonym voice band. See electromagnetic… (Read More →)

A patching facility that provides the first appearance of local-user VF circuits in the technical control facility (TCF).
Note: The VF primary patch bay provides patching, monitoring, and testing for all VF circuits. Signals will have various levels and signaling schemes depending on the user terminal equipment.

Synonym voice-frequency telegraph.

In the public regulated telecommunications services, a service grade that is described in part 68, Title 47 of the Code of Federal Regulations [CFR].
Note: Voice-grade service does not imply any specific signaling or supervisory scheme.

The field within a voice packet that contains blocks arranged according to the significance of the bits: the first block contains the most significant bits (MSBs) of all samples, the second contains the second MSBs, and so on. Within a block, bits are ordered according to their corresponding sample numbers. [After T1.312-1991]

Synonym vox.

Synonym vox.

The element that provides routing information to support the routing of VoIP emergency calls, and cooperates in delivering location information to the PSAP over the existing ALI DB infrastructure. The VPC supports access to the routing data in the Emergency Routing Database.

See quasi-analog signal.

A channel capable of carrying analog and quasi-analog signals.