(VG) A channel that is capable of carrying voice-frequency signals.

Narrowband. A low-capacity communications Circuit/path. It usually implies a speed of 56Kbps or less. (Contrast with Wideband and Broadband)

(1) Access line suitable for voice, low-speed data, facsimile or telegraph service. (2) Line that generally has a frequency range of about 300 to 3000 Hz.

A term used to describe a typical dial-up line with a bandwidth of 3000 Hz.

In the public regulated telecommunications services, a service grade that is described in part 68, Title 47 of the Code of Federal Regulations.

A category of communications where bandwidth is equivalent to that of a telephone line obtained through the public telephone network. The maximum potential bandwidth of a voice-grade channel is approximately 20 kilohertz; however, most voice grade channels in a transmission facility are usually spaced 4,000 hertz apart, and not all of that bandwidth is generally available to a user due to the presence of noise-limiting loading coils. The telephone network itself is usually defined in terms of channels, with frequencies from 300 to 3,400 hertz.

An IBM standard for software that runs on the host mainframe computer and works with the Network Control Program to establish communications between the host and the cluster controllers. Among other things, VTAM sets the pacing and logical unit (LU) characteristics.