AT&T DS1/DMi/ISDN-PRI manual Inads

		GLOSSARY	GL-11
high-volume	A tandem communications system that is used only to selectively route high-
tandem	volume traffic to alternate routes. See also Automatic Route Selection.
hyperactivity	A failure condition in which a digital signal level 1 (DS1) facility generates on-
	hook and off-hook stimuli at a very high rate.
INADS	See Initialization and Administration System.
inband	Signals transmitted within the same channel and frequency band used for message
signaling	traffic. See also robbed-bit signaling.
information	A logical block of data in a Q.931 message. IEs provide specific information
element (IE)	related to either telephone or data-terminal capabilities, such as light and ring
	code information; button and switchhook state changes; data rates; message type;
	calling, called, and redirecting party identification; and data-rate and circuit- or
	packet-switching	compatibility.
information	The part of the bearer capability information element (IE) that specifics channel
transfer	requirements in terms of voice, voice-grade data, restricted digital data, and
capability	unrestricted digital data. See also restricted channel and unrestricted		channel.
information	The data rate at which a channel operates. For B-channels the rate is 64K-bps;
transfer rate	for wideband channels the rate is an integer multiple of 64K-bps. The exact rate
	is dependent on the type of the channel — for example, H0 or H11. See also
	wideband channel.
Initialization	A software and hardware tool used by AT&T Services personnel located at
and	Customer Service Support Organizations (CSSOs) or the National Customer
Administration	Support Center (NCSC) to initialize, administer, and troubleshoot customer
System	communications	systems remotely.
(INADS)

IntegratedA public or private network that provides end-to-end digital connectivity for all

Services Digital services to which users have access by a limited set of standard multipurpose

Network (ISDN) user-network interfaces defined by the CCITT. 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. See also Integrated Services Digital Network basic rate interface and Integrated Services Digital Network primary rate

interface.

IntegratedThe interface between a communications system and terminal that includes two

Services Digital 64K-bps B-channels for transmitting voice or data and one 16K-bps D-channel

Network basic for transmitting associated B-channel call-control and out-of-band signaling

rate interface information — an arrangement called 2B+1D. ISDN-BRI also includes 48K-bps

(ISDN-BRI)for transmitting framing and D-channel contention information, for a total interface speed of 192K-bps. ISDN-BRI serves ISDN terminals and digital terminals fitted with ISDN terminal adapters. See also Integrated Services

Digital Network, Integrated Services Digital Network primary rate interface, and out-of-band signaling.