Panasonic 15000 - Manual (Page 19)

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List of terms
Nortel Multiservice Switch 7400/15000/20000
Terminology
NN10600-005 7.2S1 Standard
PCR7.2 and up March 2006
Copyright © 2006, Nortel Nortel Confidential
2 See backplane control system (BCS) (page 17) .
Be
See excess burst size (Be) (page 50) .
bearer channel (B-channel)
In ISDN connections, a 64 kbit/s digital bidirectional channel for carrying voice
and data traffic.
BECN
See backward explicit congestion notification (BECN) (page 17) .
beginning of message (BOM)
The first cell in a series of cells that result from segmentation of higher-layer
packets or frames. The BOM cell marks the first cell in the cell series that
represents one packet or frame.
BFS
See backplane file system (BFS) (page 17) .
BGP
See border gateway protocol (BGP) (page 20) .
binary 3 zero substitution (B3ZS)
An encoding technique used to transfer bits over a DS3 line. B3ZS guarantees
1’s density by substituting a pattern of bipolar violations if three or more zeros
in a row are to be transported.
binary 8 zero substitution (B8ZS)
An encoding technique used to transfer bits over a DS1 line. B8ZS guarantees
1’s density by substituting a pattern of bipolar violations if eight or more zeros
in a row are to be transported.
binary-coded decimal (BCD)
1 A computer coding system that represents each decimal number with a
group of four binary digits (1s and 0s).
2 A component model data type.
bipolar violation (BPV)
A failure to follow alternate mark inversion coding. BPVs are intentionally
inserted in the bit stream using 1’s density techniques.
bit 7 stuffing
When a T1 or E1 time slot has all 0s, bit 7 (the least significant bit) is forced to
a 1.