Fluke 990DSL, User Manual

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990DSL
Users Guide
5-38
This test may either be performed at installation of the DSLAM or modem to
verify service turn-up, or as a diagnostic tool to help pinpoint the root problem
during ADSL trouble calls on existing services.
The ATU-C test should be run at the customer’s location in order to get
meaningful bit-rate information over the entire loop. The ATU-R test can be
performed at either the DSLAM or customer’s location, as it is used only to
verify operation of the modem and not to obtain bit-rate information.
Setting up an ADSL Verify Test
There are no setups required for this test. The test is not modem-vendor
specific and works equally well on all network equipment conforming to ANSI
TI.413, ITU G.992.1 or G.992.2.
Running an ADSL Verify Test
From the
Main
menu (Figure 3-2), select
ADSL Verify Test
and then press
L
.
The ATU-C Test / ATU-R Test option screen is displayed.
ATU-C Test
To test the line and DSLAM for performance, do the following:
1. At the customer’s location, disconnect the outside line from the ADSL
modem.
2. Connect the tester pair 1 test leads to the Tip, Ring, and Ground terminals
of the outside line.
3. Press
A
(
ATU-C Test
), then press
K
.