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Observe HDSL & DS1 pinouts and wire accordingly to avoid
placing HDSL span power voltage on DS1 equipment. Wiring
these leads incorrectly will result in equipment damage and
void all warranties.
I
NSTALLATION
To ensure proper installation of the HLU, align the line unit with the enclosure slot
guides and slide the unit in. The unit should snap into place, indicating that the unit is
properly seated.
P
OWER
When the HLU powers up, the four-character display illuminates and reports status
messages.
If the unit is not communicating with the next span device, the following occurs:
1
Alarm and diagnostic messages display, followed by the self-test message.
2
The Status LED lights yellow, indicating it has entered self-test mode.
If the unit is communicating with the next span device, the following occurs:
1
The Status LED flashes green while acquiring each device in the system, and
lights a steady green when the entire system is operating without any alarms.
2
The four-character display reports margin (signal-to-noise ratio) readings and
insertion loss.
3
If the status LED is not solid green, the display reports alarm conditions.
P
ROVISIONING
Provision the HLU through the SEL and MODE front-panel pushbuttons:
1
Press the MODE pushbutton for approximately one second.
2
Press the SEL pushbutton to step the display through all possible settings.
3
Press the MODE pushbutton to select the desired parameter and move to the next
parameter.
4
Upon configuring your final parameter, press either the SEL pushbutton (to install)
or press the MODE pushbutton (to bypass). If either of the pushbuttons are not pressed
within 30 seconds, the settings are bypassed.
-U
S
P
EQUENCE
Continued
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