Loopback Test Procedures; General Troubleshooting Tips; Setting The Loopback Time-Out Option - ADC HiGain H2TU-C-202 User Manual

Testing
L T
OOPBACK EST
The following sections provide step-by-step test procedures for verifying the integrity of the HDSL2 channels at
every module location as well as the DS1 channels to the customer and the local DSX-1 interface.

General Troubleshooting Tips

If trouble is encountered on the DSX-1 interfaces of the H2TU-C, verify that the:
• H2TU-C is making a positive connection with its mounting assembly (shelf) connector.
• H2TU-C internal equalizer is set to the correct distance range per
be set to the distance from the DSX-1 to the shelf.

Setting the Loopback Time-Out Option

Before activating any loopback, verify that the Loopback Time-Out option is set to the desired value.
page 15 describes this option.
1 Log on to the maintenance terminal.
ESC
2 Press to clear the screen, then press
3 Select Standard Options, then LBTO.
4 Press the SPACEBAR
Once activated, a loopback stays active until it times out (based on the LBTO setting) or until a loopdown
command is executed to terminate the loopback. When a loopback terminates, the display returns to its normal
display mode.
All loopbacks can be initiated by inband commands in the DS1 payload. Loopbacks can also be initiated by a
command from the HDSL2 system using maintenance screen selections. Therefore, whenever a loopback is
active, the method by which it was activated is indicated in the Loopback and Status screens by the annotation HG
or PL adjacent to the identified loopback. For example, NREM-HG indicates that the loopback was initiated by
the HDSL2 system.
44
P
ROCEDURES
C
to select the Config menu.
to select the LBTO, then press
June 6, 2003
Table 6 on page
ENTER .
LTPH-UM-1208-01
15. All equalizers should
Table 6 on
H2TU-C-202 List 7G