Cisco BPX 8650, Installation And Configuration Manual

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Glossary
GL-3
Cisco BPX 8600 Series Installation and Configuration
Release 9.3.30, Part Number 78-12907-01 Rev. E0, May 2005
auxiliary port
An RS-232 port on the front panel of the SCC card used for connecting a printer or an out-dial modem.
This port is a one-way, outgoing port.
available bit rate
See ABR.
B
B channel
In ISDN, a full-duplex, 64-kbps channel used to send user data. Also known as the bearer channel.
Compare with D channel.
B3ZS
bipolar with three zero suppression.
A protocol for T3 lines that converts a channel word with three consecutive zeros into a code which at
the far end is converted back to three zeros.
B8ZS
bipolar with eight zero suppression.
A T1 line protocol that converts a channel word with eight consecutive zeros into a code which, at the
far end, is converted back to eight zeros. Allows 64 Kbps clear channel operation while assuring the
ones density required on the T1 line.
bandwidth
reservation
A software feature that allows circuits to automatically become active (or “upped”) at a specified time
and date and downed at some later time and date. For circuits that do not need to be available 100% of
the time.
basic rate interface
See BRI.
BCC
broadband controller card.
The switch control card in the BPX is the Broadband Control Card, with a 68040 processor.
BC-E1 (Back Card
E1)
E1 interface card used on IGX switches.
BC-E3 (Back Card
E3)
E3 interface card used on IGX switches.
BC-J1 (Back Card
J1)
J1 interface card used on IGX switches.
BC-SR (Back Card
Subrate)
Subrate interface card used on IGX switches.
BC-T1 (Back Card
T1)
T1 interface card used on IGX switches.
BC-T3 (Back Card
T3)
T3 interface card used on IGX switches.
BC-Y1 (Back Card
Y1)
Y1 interface card used on IGX switches.
bipolar with three
zero suppression
See B3ZS.