29 Appendix
370
ARGUS 152
29 Appendix
A) Abbreviations
Characters
1TR6
Signalling protocol (D-channel protocol) for national ISDN of the former
German national PPT (Bundespost)
2B1Q
2 binary 1 quaternary - line code
3PTY
Three party service
4B3T
4 binary 3 ternary - a modified monitored sum 43-code (MMS43)
Δ
f
Bandwidth
Ω
Ohm (electrical resistance)
A
A
Ampere (electrical current)
A3K1H
Audio 3.1 kHz
A7kHz
Audio 7 kHz
AAL
ATM adaptation layer
AC
Alternating Current or Access Server
ADSL
Asymmetric Digital Subscriber Line
Al
Action indicator
AIT
Application information table
AMP
ARGUS measurement protocol
ANSI
American National Standards Institute
Anx.
Annex
AOC
Advice of charge
AOC-D
Advice of charge
Charging information during the call
AOC-E
Advice of charge
Charging information at the end of the call
APL
("Anschlusspunkt Linie") Service termination point
AS
Available second
ASCII
American Standard Code for Information Interchange
ATM
Asynchronous Transfer Mode
ATU-R
ADSL Transceiver Unit
Auto-MDI-X
Automatic Medium Dependent Interface Crossing
Avg
Average
AWG
American Wire Gauge
AWS
("Anrufweiterschaltung") Call forwarding (1TR6)
B
BC
Bearer capability