ADCP-61-471 • Issue 4 • June 2000 • Section 2: Operation and Maintenance
2-55
© 2000, ADC Telecommunications, Inc.
DLP-515
Page 1 of 1
HDSL-EQUIPPED CIRCUIT CROSS-CONNECTS
Summary:
This procedure provides instructions for making any necessary cross-connects on
HDSL loops, and then re-install the HLXC modules.
Danger:
To avoid electric shock, be careful when working near HDSL loop connections
or telecommunications circuits. An electrical potential of ±130 volts exists on HDSL
loop connections and telecommunications circuits. Coming in contact with this high
electrical potential will result in death or severe personal injury.
Caution:
Electronic modules can be damaged by electrostatic discharge (ESD). Before
handling modules, wear an anti-static discharge wrist strap to prevent damage to
electronic components. Place modules in anti-static packing material when transporting
or storing. When working on modules, always place them on an approved anti-static mat
that is electrically grounded.
1. Open the chassis cover.
2. Use the ejector at the bottom of each HLXC module front panel to carefully disengage the
module from its connector.
3. Withdraw each HLXC module part way to break electrical contact with the backplane
connector.
Note:
The HLXC module can be configured to supply –130 VDC simplex current over
the HDSL loops to supply power to the remote HLXR modules. When an HDSL
Repeater (HRX) is in the HDSL loops, HLXC modules can be configured to supply
±130 VDC. Partially withdrawing the HLXC module ensures that current is not present
when cross-connects are installed.
4. At the central office, make necessary cross-connects at the Main Distribution Frame, or
other facility, in accordance with local practice.
5. At the remote location, make necessary cross-connects at the remote distribution frame, or
other facility, in accordance with local practice.
6. Re-install the HLXC module(s) in their mounting slots.
Stop! You have completed this procedure.
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