Loopback Test Procedures - PairGain HiGain HLU-319 Manual

Revision 01

Loopback Test Procedures

The loopback configurations are shown in
Figure 4. HLU-319 List 4B Loopback Configurations
These following loopback procedures verify the integrity of the HDSL
channels at every module location as well as the DS1 channels to the
customer and the local DSX-1 interface.
If trouble is encountered on the HLU-319 List 4B DSX-1 interface, verify that
the HLU-319 List 4B is making a positive connection with its mounting
assembly (shelf) connector. Also, verify that the HLU-319 List 4B internal
equalizer is set to the correct distance range. All equalizers should be set to
the distance from the DSX-1 to the shelf.
The transmit and receive T1 DSX-1 ports have splitting access and bridging
miniature 210 series jacks. Connecting one cable between the two bridging
32
December 22, 1997
PairGain Engineering - Plant Series
Figure 4.
150-319-142-01
HLU-319 List 4B