Installation guide

SZ-DOC-W5-1.pdf LTU/NTU
Version: 1.5 Operating Manual
117 Revision: 2002-09-10
14 Appendix
14.1 Abbreviations
ACU
Alarm Control Unit
CAP
Carrierless Amplitude Phase Modulation
ITU
International Telecommunication Union
CCS
Common Channel Signaling
CMU
Control and Management Unit
CRC
Cyclic Redundancy Check
DSL
Digital Subscriber Loop
E1
ITU-T G.703 User Interface at 2048 kbit/s
ET
Exchange Termination
EOC
Embedded Operations Channel
frE1
Fractional E1
ISDN
Integrated Services Digital Network
ITU-T
International Telecommunication Union
LT
Line Termination
LTU
Line Termination Unit
NC
Not Connected
NEXT
Near End Cross Talk
NM
Noise Margin
NT
Network Termination
NTU
Network Termination Unit
PDH
Plesiochronous Digital Hierarchy
PRA
Primary Rate Access
PSD
Power Spectral Density