Set The Scurr Option - ADC HiGain HRU-402 Manual

LTPH-TP-1024-02, Issue 2
Figure 3. Location of Switch S1 on HRU-402 Circuit Board

Set the SCURR Option

The HRU-402 can source from 30 mA (short loop) to 20 mA (long loop) of
simplex sealing current towards the upstream unit over the two HDSL pairs.
Do one of the following:
•
If the HRU-402 is to be used with an HDU-451 List 1, 2, 3, or 3B
doubler, disable the simplex sealing current. These doublers are only
compatible with the metallic sealing current of earlier remote units.
• If the HRU-402 is to be used only with those doublers listed under
"Compatibility" on page
compatible doublers provide a path through which the simplexed sealing
current can flow.
HRU-402 List 4
7, enable the simplex sealing current option; the
January 3, 2001
Installation
9