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SONET_Usr.bk Page 210 Wednesday, December 13, 2000 11:11 AM
Glossary of Terms
Glossary
A
AAL
ABR
ADDF
ADM
ADPCM
AIM
AIS
AMI
ANSI
APS
ASCII
ATM
AU
AU-AIS
AU-LOP
AU-NDF
B
BBER
BC
BCD
BER
210
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Glossary
ATM Adaptation Layer
Available Bit Rate
Automatic Digital
Distribution Frame
Add Drop Multiplexer
Adaptive Differential
Pulse Coded Modula-
tion
ATM Inverse Multi-
plexer
Alarm Indication Signal
Alternate Mark Inver-
sion
American National
Standards Institute
Automatic Protection
Switching
American Standard
Code for Information
Interchange
Asynchronous Transfer
Mode
Administrative Unit
AU Pointer Justification
Event
Loss of AU Pointer
AU Pointer New Data
Flag
Background Block
Error Ratio
Background Channel
Binary Coded Decimal
Bit Error Rate
BERT
Bit Error Rate Testing
BIP
Bit Interleaved Parity
BPS
Bits Per Second
BPV
Bipolar Violation
C
CAS
Channel Associated
Signaling
CBR
Constant Bit Rate
CCITT
Consultative
Committee on Interna-
tional Telegraphy and
Telephony
CCS
Common Channel
Signaling
CDT
Cell Delay Tolerance
CDV
Cell Delay Variation
CEPT
Committee of Euro-
pean PTTs
CMI
Coded Mark Inversion
CO
Central Office
CPE
Customer Premises
Equipment
CRC
Cyclic Redundancy
Check
CSES
Consecutive Severely
Errored Seconds
D
D/I
Drop and Insert
DACS
Digital Access and
Cross-connect Switches
dB
Decibel
DCC
Data Communications
Channel
DCS
Digital Cross-connect
Switches
DDF
Digital Distribution
Frame
DDN
Digital Data Network
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