ADTRAN Atlas 550 - Manual (Page 245)

Appendix G. Glossary
61200305L1-1 ATLAS 550 User Manual G-5
Full Status Poll
A poll that occurs each N391 polls and reports the status of each PVC. During this poll the frame relay
switch can also notify the user side of the UNI of any creation or deletion of frame relay PVCs.
G.723.1
ITU-specified voice compression algorithm.
Groom
The assignment and redistribution of any DS0 on any T1 circuit to any other DS0 on any on the T1 cir-
cuits in a DACS.
Group of Four
The Frame Relay Consortium, composed of Cisco Systems, DEC, Nortel, and StrataCom, which
defined an interface for the UNI.
HDLC
High Level Data Link Control. A generic link-level communications protocol developed by the Inter-
national Organization for Standardization (ISO). HDLC manages synchronous code-transparent,
serial information transfers over a link connection.
hot swappable
A device is hot swappable if it can be installed without powering down the main unit.
IAD
Integrated Access Device. A network access device that provides many services from a single plat-
form. The ATLAS 550 is an IAD.
IARP
Inverse Address Resolution Protocol. Used for resolving the protocol address when the hardware
address is known.
ICMP
Internet Control Message Protocol. Specified in RFC-292 to provide diagnostic functions.
Integrated Access System
A chassis-based product that supports a number of end-user applications on the subscriber side and a
number of carrier interfaces on the trunk side. The ATLAS 550 is an Integrated Access System
designed to provide significant wide-area cost savings through the consolidation of voice, data, fax,
and video.
IP
Internet Protocol. A protocol which provides for transmitting blocks of data between hosts identified
by fixed-length addresses.
ISDN
Integrated Services Digital Network. A network architecture that enables end-to-end digital connec-
tions. The network supports diverse services through integrated access arrangements and defines a
limited set of standard, multipurpose interfaces for equipment vendors, network providers, and cus-
tomers. Interworking with a public switched telephone network is retained.
ITU-T Q.933-A (Annex A)
See Annex A.