Definity ECS Admin for Network Connectivity.pdf - TextFiles.com

High Density Bipolar 3-Bit Substitution (HDB3)
Glossary
High Density Bipolar 3-Bit Substitution (HDB3)
HDB3 line coding is similar to Bipolar 8 Zero Substitution (B8ZS) in some
ways. It replaces every 4 consecutive zero in a stream of AMI-encoded data
(see line coding) with either of two sequences. If there has been an even number
of 1s since the last substitution, it substitutes the pattern 1 0 0
BipolarViolation, where BipolarViolation is a 3-volt pulse (a 1) of the
same polarity as the preceding 3-volt pulse. If there has been an odd number of
1s since the last substitution, HDB3 coding substitutes the pattern 0 0 0
BipolarViolation for the 4-zero string. This system does not corrupt binary
data, and is commonly used with E-1 lines.
host
A server.
host name
See server name.
I
IANA
Internet Assigned Number Authority.
INADS
Initialization and Administration System
Information element (IE)
The data fields in ISDN messages.
in-service state
The condition or state of an MMCX server that is ready to handle calls.
International Standards Organization (ISO)
A body that defines and/or adopts protocols widely used in the computer and
telecommunications industries.
International Telecommunications Union (ITU)
Formerly known as International Telegraph and Telephone Consultative
Committee (CCITT), ITU is an international organization that sets universal
standards for data communications, including ISDN. ITU members are from
telecommunications companies and organizations around the world.
Internet
The decentralized network of networks that grew from ARPAnet and supported
by TCP/IP.
476
Administration for Network Connectivity
CID: 77730 555-233-504 — Issue 1 — April 2000