User`s guide

A. Configuration Options
A-2
May 2002 7990-A2-GB20-00
DSL Interface Options
For DSL Port Interface Options, refer to Table A-1, DSL Interface Options.
To access the DSL Interface Options screen, follow this menu selection sequence:
Main Menu
→
Configuration
→
Current Configuration
→
DSL Port
Table A-1. DSL Interface Options (1 of 3)
PSD Mask
Possible Settings: Symmetrical, Asymmetrical
Default Setting: Symmetrical
Determines the type of Power Spectral Density (PSD) mask used as specified in G.992.1,
Annex B. In Asymmetric mode, the transmit power of the CO device is set to
16.8 ±0.5 dBm and the transmit power of the CPE is set to 16.5 ±0.5 dBm when in data
mode. In Symmetric mode, the transmit power of the CO and CPE devices are set to
13.5 dBm when in data mode. So, for longer reach the transmit power of the CO and CPE
units are increased to help with crosstalk issues. Due to this increase in power, the power
levels between the CO and CPE units are asymmetric.
PSD Mask only appears when DSL Mode is set to STU-C (see Table A-6, System
Options).
Asymmetrical – The asymmetric PSD mask is used. Select Asymmetrical when the
remote unit transmit power level is higher than the CO transmit power level.
Symmetrical – The symmetric PSD mask is used. Select Symmetrical when the remote
device transmit power level is set to the same value as the CO transmit power level.
main/config/dsl_interface
Model: 799x
DSL INTERFACE OPTIONS
PSD Mask: Symmetrical
Estimated Line Length: Long
Startup Margin: 4dB
Max DSL Rate: 2056 Kbps
Min DSL Rate: 2056
Kbps
EIA-530 Payload Rate: 2048
Kbps
Remotely Initiated Loopback: Enable
Peer IP Address: 135.090.025.001 Clear
Circuit Identifier: Clear
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Ctrl-a to access these functions, ESC for previous menu M
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