Symmetricom GoWide 4.6, User Manual

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GoWide 4.6 G.shdsl Bridge/Router – User Manual
G.shdsl Configuration
097-91022-01 Issue 1: February 2002
S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S S
D
G.shdsl Configuration
Only expert users should change the settings in the G.shdsl Setting page. The
default settings arem shown in Table F.
The Unit Type is set as Customer Premise Equipment (CPE), which enables the unit
to be connected to a Central Office (CO) unit, usually a DSLAM. If the user will be
using two GoWide 4.6s in a back-to-back configuration, then one of the GoWide
4.6s needs to be set to CO Unit Type.
The Line Type is only found on the GoWide 4.6 and is set to four-wire operation.
This means that both pairs will work as one higher capacity link, but if one pair is
removed/cut then the link will go down and no data will be transmitted. If the
modem type is set to two independent two-wire channels, and one of the pairs were
removed/cut, the link would still be maintained at a lower link speed.
The Standard is set to Auto, but can be manually changed to either Annex A or B.
The Asymmetric PSD (Power Spectral Density) allows the selection of what type of
power spectral density mask the transceiver will use. The possible values are R1
(768 kbps for Annex A), R2 (1544 kbps for Annex A) or Disable (use symmetric
PSD).
The Power Backoff is set to Enable, which allows the transmit power on the DSL
link to be reduced by 6 dB when the estimated power loss is 6 dB or less.
Figure 82 shows the G.shdsl Configuration screen.
Table F. G.shdsl Default Settings
Item Setting
Unit Type CPE
Line Type* Auto Detect
Standard Auto
Asymmetric PSD Disable
Power Backoff Enable
* Only found on GoWide 4.6.