JDS Uniphase OneExpert DSL, Руководство пользователя

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Chapter 4 DSL Testing
Specifying test settings
OneExpert DSL User’s Guide
38
22052280, Revision 001 April 2014
8 Specify the ATM Layer settings. This section only appears if you specified Auto or ATM trans-
port mode.
a Select Encapsulation and then select LCC-SNAP or VC-MUX .
b Set the VC Count between 1 and 4.
c Specify the VC settings for each virtual channel (VC 1 through VC 4): VPI, VCI, and VC
Mode (
Tx Rx or Rx only )
9 Select Advanced DSL Settings and then specify the following:
a Specify whether to use DSL Retransmission upstream or downstream. This setting is
only available in non-bonded mode. This specifies 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.
b Specify whether to use PhyR (impulse noise protection technology) upstream or down-
stream.
c Specify whether to use SRA . Seamless Rate Adaptation changes the data rate while in
operation without any interruption to data service.
d Specify whether to perform Bitswapping .
e If you selected VDSL or Auto as the Technology, select V43 Tones and enable or disable
V43 tones. V43 tones are typically used during training, but your test requirements may
include disabling these tones, This selection is not available if in ADSL mode. If vectoring
is enabled, it is recommended that V43 tones are disabled.
f Select 24k Interlv Depth , and then select On or Off . Interleaving splits data packets into
smaller
bits, and then rearranging them so that contiguous data is now spaced further apart into a
non continuous stream (and re-assembled by the modem). This is effective for lines susceptible to
bursts of noise
.
10 Select Network Settings and then specify the following:
a Select Network Type and then specify Through-Bridge or Terminate
The two modes include the same testing capabilities, but the difference is in the IP
addressing.
In
Terminate mode, the OneExpert DSL replaces the modem and test interface.
In Through-Bridge mode, the OneExpert DSL replaces the modem, hub, and test inter-
face. It does not use a DHCP server so it does not assign IP addresses to other equip-
ment. The end equipment uses either the service provider-supplied IP address or one
that is on the same network (same netmask).
NOTE:
Enabling DSL Retransmission (adding the check mark) only advertises support to the DSLAM. It
does not guarantee the connection will use DSL Retransmission (G.INP) because G.INP is
specified in the CO configuration.
CAUTION: FAULTY RESULTS
Any time the Network settings are changed, the network layer resets. If you change these set-
tings during a test, you may cause errors in the test. Only change them before you begin a test.