Cisco BPX-BXM-155-8DX Installation And Configuration Manual page 601

A
The bit in the frame relay frame header that indicates the status of the far end user device and the status
A-bit (active bit)
of the PVC segment in the foreign network.
An analog to digital encoding scheme used to convert voice samples to an 8-bit data word used in CEPT
A-law
E1 multiplex equipment. (See also -law.)
ATM connection type for bursty traffic, such as data. Provides closed loop control of service rate that
ABR (Available Bit
Rate) allows connections to use additional bandwidth when available. ABR may be used with ATM Traffic
Management 4.0 standards VSVD flow congestion control, or with the proprietary ForeSight flow
congestion control. (See also CBR and VBR.)
A switch to turn off the audible alarm outputs from a node while leaving the visual alarm outputs
ACO (Alarm Cut
Off) unchanged.
An optional feature that disables VAD from connections using it whenever there is excess bandwidth
adaptive voice
available to allow the normal encoded voice to be carried on the packet line. (See also VAD.)
A compression method that samples voice 8,000 times per second, and uses the changes between
ADPCM (Adaptive
Differential Pulse samples as the basis for compression. Increases the capacity of a T1 line from 24 to 48 channels.
Code Modulation)
Time permitted between sending RM cells before the rate is decreased to ICR.
ADTF (Allowed Cell
Rate Decrease
Factor)
The AIT-E3 backcard provides an E3 interface for the BTM (IGX switch) ATM trunk cards.
AIT-E3 (ATM
Interworking Trunk
E3 Interface Card)
The AIT-T3 backcard provides a T3 interface for the BTM (IGX switch) ATM.
AIT-T3 (ATM
Interworking Trunk
T3 Interface Card)
An automatic rerouting of a failed connection by a node to a new route through the network to maintain
alternate routing
service.
The line code used for T1 and E1 lines where the "1s" or "marks" on the line alternate between positive
AMI (Alternate
Mark Inversion) polarity and negative polarity.
A BPX administration processor that polls each network port to control the data flow in and out of the
arbiter
crosspoint switch matrix.
An alarm interface back card for the IGX switches.
ARI (Alarm Relay
Interface Card)
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
G L O S S A R Y
Cisco BPX 8600 Series Installation and Configuration
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