User's Manual

Chapter 6 DSL Testing
Specifying test settings
SmartClass TPS User’s Guide
May 2014 22035456, Rev 001 53
c Select Transport Mode and then choose the transport.
ATM specifies Asynchronous Transfer Mode. PTM specifies Packet Transfer Mode. Auto will
query the DSLAM for the transport mode.
5 Select G.INP Setup and then specify whether the unit will advertise upstream or downstream
G.INP support to the DSLAM. If the selection is changed, the modem resyncs in order to apply
the new setting.
6 Select Vector Mode and then select Full, Friendly, or Off.
Vectoring technology is used on VDSL2 connections to reduce cross-talk from other pairs in a
binder group resulting in higher downstream and upstream rates for all the pairs in the group.
Vector mode is available for single-line VDSL circuits only (not available for bonded, not avail-
able for ADSL2). Vector Friendly mode is suggested when there is a need to emulate CPE
incapable of full vectoring, but which have been designed to synchronize to a vectoring
DSLAM without losing sync. It is a special software that is downloaded to the VTU-R modem
enabling it to respond to a vectored request from a VTU-O to allocate net data rates across all
bearer channels and to minimize excess SNR per channel.
– If using vectoring, the Data network must be enabled and configured because the data layer
is used to communicate parameters between the DSLAM and modem during showtime.
7 Select SOS Mode and then specify whether to use SOS mode.
This setting is only applicable to VDSL.
When enabled, SOS mode ensures that a connection is maintained on the DSL link regardless
of suddenly degraded conditions (such as large increases in noise or a large degradation in
SNR) and allows the application to maintain at least a minimal connection during a period of
degradation. SOS mode can prevent retraining, allowing a more graceful return to normal
operation when the period of degradation has ended.
8 Press Cancel to return to the DSL Summary results menu.
Specifying DSL settings for Bonded mode (For BCM96368 modem only)
To specify Bonded DSL test settings
1 From the ADSL Bonded or VDSL Bonded menu, select ADSL or VDSL.
The Group Summary results menu appears.
Press the asterisk (*) to view the Setup menu.
2 Do one of the following:
– If you are testing ADSL Bonded, select ADSL Modulation and then choose ADSL2,
ADSL2+, Annex M, or Auto. Auto will query the DSLAM for the modulation.
– If you are testing VDSL Bonded, select VDSL Profile and then choose a profile. Auto will
query the DSLAM for the modulation.
NOTE:
Enabling G.INP only advertises support to the DSLAM. It does not guaran-
tee the connection will use G.INP because G.INP is specified in the CO con-
figuration.
NOTE:
When testing on a line that is configured for vectoring, the time to achieve
showtime may be longer than a VDSL2 line without vectoring because it
takes additional time to negotiate with the DSLAM while assessing all of the
pairs for cross-talk.