Page 653 - 5G Basics - Core Network Aspects

Transport aspects 2

4 Abbreviations and acronyms

This Recommendation uses the following abbreviations and acronyms:
DAB Digital Audio Broadcasting

DMT Discrete Multitone
DP Distribution Point

DSL Digital Subscriber Line
EMC Electromagnetic Compatibility
FAST (G.fast) Fast Access to Subscriber Terminals

FM Frequency Modulation
FTU FAST Transceiver Unit

FTU-O FTU at the Optical network unit
FTU-R FTU at the Remote site (i.e., subscriber end of the loop)
LESM Low-frequency Edge Stop-band Mask

LPM Limit PSD Mask
MBW Measurement Bandwidth

MIB Management Information Base
NM Notching Mask

PSD Power Spectral Density
PSM PSD Shaping Mask

QoS Quality of Service
SM Subcarrier Mask
TDD Time-Division Duplexing

TxPSDM Transmit PSD Mask

5 Conventions
None.

6 Transmit PSD mask

6.1 Overview

The transmit PSD mask (TxPSDM) is constructed from the combination of the following masks:
− limit PSD mask (LPM);

− subcarrier mask (SM);
− PSD shaping mask (PSM);
− notching mask (NM); and

− low-frequency edge stop-band mask (LESM).
The TxPSDM applied to the FAST transceiver unit (FTU) at the optical network unit (FTU-O) or at the FTU
remote site (i.e., subscriber end of the loop) (FTU-R) may be different.
For an FTU, the PSD of the transmit signal at any frequency shall never exceed the TxPSDM.

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