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DN01145897 © Nokia Corporation 101 (128)
Issue 2-0 en Nokia Proprietary and Confidential
• STU-C (6,3,3,1)
This option defines the unit as a SHDSL Termination Unit (STU) Central
office. It also sets the bit rate in the line as Fixed. STU-C determines line
rate to the value given with the menu command Give line rate
(6,3,3,1,2,1).
• STU-R (6,3,3,2)
This option defines the unit as a SHDSL Termination Unit (STU) Remote.
It also sets the bit rate in the line as Rate adaptive. If the line conditions
(attenuation/noise) allow, STU-R adapts to the line rate set on the STU-C
side.
• Two-wire (6,3,3,1,2)
In the 2-wire option, only Line 1 is enabled. Line 2 is idle. See Figure 8 for
line connector pins.
• Four-wire (6,3,3,1,4)
In the 4-wire option, both lines (Line 1 and Line 2) are enabled. See Figure
8 for line connector pins.
• PSD mask: Symmetric
Symmetric PSD mask defines the spectral shape of the signal transmitted
to the line. The symmetric PSD is in use for both 2- and 4-wire modes
(G.991.2 Annex B).