AT&T MERLIN LEGEND System Reference Manual page 635

Glossary
H
headset
An ultralight earpiece and microphone for hands-free telephone operation.
Home screen
The "home base" of the display screen on digital/lSDN telephones, which shows time, date, and call information, and when a
feature is in use.
house cable
Cable that runs from the equipment room to a small, walk-in closet (called a satellite closet) elsewhere in the building.
Hybrid/PBX
A mode of operation in which the communications system uses trunk pools and Automatic Route Selection (ARS) in addition
to personal lines-that is, direct facility terminations (DFTs) on line buttons. The Hybrid/PBX mode also provides a single
interface to users for both internal and external calling.
I
immediate-start tie trunk
A tie trunk on which no start signal is necessary and dialing can begin immediately after the tie trunk is seized.
in-band signaling
See robbed-bit signaling.
inside dial tone
A tone the user hears when they are connected to an intercom line.
Inspect Screen
A display screen on digital/ISDN telephones that allows users to preview incoming calls and see a list of the features
programmed on line buttons.
integrated access
The use by customers of voice, data, images, and fax simultaneously on an integrated Services Digital Network (ISDN).
lntegrated Services DigitaI Network (ISDN)
A public or private network that provides end-to-end digital connectivity for all services to which users have access by a
limited set of standard multipurpose user-network interfaces defined by the CCITT (International Telegraph and Telephone
Consultative Committee). Through internationally accepted standard interfaces, ISDN provides digital circuit-switched or
packet-switched connectivity within the network and links to other ISDNs to provide national and international digital
connectivity.
Integrated Solution II (IS II)
One or more UNIX-based applications for improving voice and data communications and automating office operations.
Integrated Voice Power Automated Attendant
An IS II application that automatically answers incoming calls with a recorded announcement and directs callers to a
department, an extension, or the system operator.
interface
Hardware, software, or both that links systems, programs, or devices.
I/O (input/output) device
Equipment that can be attached to a computer internally or externally for managing a computer system's input and output of
information.
GL-8 Glossary