Digicom COMSPHERE 3911 User Manual

3910-A2-GN32-40

September 1998

A configuration area containing configuration options currently in use by the modem. When a
power cycle occurs, a reset is performed, or a save is issued using the DCP, this area is updated
with the contents of Active (Saved).

A nonvolatile configuration area containing the most recently saved configuration options. Any
changes made to configuration options can be saved using either the DCP’s Save command or
by issuing an AT&W0 command.

Advanced Diagnostic protocol. An enhanced diagnostic communication protocol used with the
6700 and 6800 Series NMS and with certain front panel diagnostic functions.

A test in which the modem’s transmit VF signal is looped to its receiver.

A type of signal composed of continuously variable values, used to transmit voice or data over
telephone lines.

The state of a modem that is ready to receive an incoming call.

American Standard Code for Information Interchange. The standard for data transmission over
telephone lines. A 7-bit code establishes compatibility between data services. The ASCII code
consists of 32 control characters (nondisplayed) and 96 displayed characters.

A factory-preset configuration area containing the configuration options most often used in
asynchronous dial networks.

Data transmission that is synchronized by a transmission start bit at the beginning of a character
(five to eight bits) and one or more stop bits at the end.

The idle state prior to the device establishing a successful connection with a remote device. It is
from the AT Command mode that AT Commands are issued.

Several AT commands issued at once. The string is preceded by an AT prefix.

The group of commands used to control and configure a device through a DTE, such as a
personal computer. The commands must begin with the characters AT and end with a carriage
return.

A prefix issued before AT commands that identifies the DTE’s data rate, parity, and character
length.

The mode in which the device automatically determines the asynchronous DTE data rate.

A capability to respond to a call received over a dial line.

A feature which allows modems to adjust their signaling rate based on current line conditions.

A common bus at the rear of a nest or chassis that provides communications and power to
circuit card slots.