29 Appendix
372
ARGUS 152
dB
Decibel
dBm/Hz
Performance measurement with the reference quantity 1 mW (milliwatt)
per hertz
DC
Direct Current
DCE
Data communication equipment
DDI
Direct dialling in
DDM
Digital diagnostic mode
DF
Delay factor
DFU
("Datenfernübertragung") Remote data transmission
DHCP
Dynamic Host Configuration Protocol
DiffServ
Differentiated services
DIN
Deutsches Institut für Normung - German Institute for Standardization
DISC
DISConnect message
DL
Download
DM
("Dienstmerkmal") Service
DMT
Discrete Multitone Transmission
DNS
Domain Name System
DPBO
Downstream power backoff
DSCP
Differentiated services codepoint
DS
DownStream band
DSL
Digital Subscriber Line
DSLAM
Digital Subscriber Line Access Multiplexer
DSS1
Digital Subscriber Signalling System No. 1
DTE
Data Terminal Equipment
DTMF
Dual Tone Multi Frequency
DTU
Data Transmission Unit
E
EAZ
("Endgeräteauswahlziffer") Local calling number (1TR6)
EC
European Community
ECT
Explicit call transfer
E-DSS1
European Digital Subscriber Signalling System Number 1
EFS
Error Free Seconds
EIT
Event Information Table
ElektroG
Elektro- und Elektronikgerätegesetz, German law governing electrical
and electronic devices
EMC
Electromagnetic compatibility
EN
European standard
EoA
Ethernet over ATM
EOC
Embedded operations channel
ES
Errored seconds
ete
end-to-end