ADC Broadband System 用户手册
ADCP-61-471 • Issue 4 • June 2000 • Section 2: Operation and Maintenance
2-81
© 2000, ADC Telecommunications, Inc.
DLP-525
Page 1 of 6
RLX INSTALLATION AND TESTING
Summary:
This procedure provides instructions for installing Version A RLX or Version B
RLX (B1 RLX and B2 RLX+) modules in the chassis and verifying that each unit is functioning.
A typical installation consists of an RLX module installed in a chassis that is connected to a
repeater or a series of line repeaters. There is no protection for this signal. Version A RLX
modules provide an APU interface, and can function without an MPU. There is no APU interface
for either Version B RLX module, and an MPU must be installed to enable configuration and
alarm reporting for these modules. Other differences between Version A and Version B RLX
modules are described below.
A typical installation consists of an RLX module installed in a chassis that is connected to a
repeater or a series of line repeaters. There is no protection for this signal. Version A RLX
modules provide an APU interface, and can function without an MPU. There is no APU interface
for either Version B RLX module, and an MPU must be installed to enable configuration and
alarm reporting for these modules. Other differences between Version A and Version B RLX
modules are described below.
Caution:
Modules can be damaged by electrostatic discharge (ESD). Before handling
any modules, ESD protection must always be used. Ensure that all modules removed
from the chassis or not installed are properly stored in anti-static packing material.
When working with modules, always place the module on an electrically-grounded,
approved, anti-static mat.
from the chassis or not installed are properly stored in anti-static packing material.
When working with modules, always place the module on an electrically-grounded,
approved, anti-static mat.
Note:
NEVER install an RLX in the same quad group with ODS2 modules.
1. Locate the configuration switches on the Version A RLX module shown in
, or
(B1) and
2. Set the configuration switches or jumpers as specified in the work order:
Version A RLX only:
The following operating parameters are switch-selectable:
•
Span (line) Power (On or Off)
•
Transmit Line Buildout (0.0 dB, 7.5 dB, 15.0 dB, or 22.5 dB of attenuation)
•
NID Loop Code Recognition (Enable or Disable)
•
Line Equalization for the DSX (0–133 feet, 133–266 feet, 266–399 feet,
399–533 feet, and 533–655 feet.)
399–533 feet, and 533–655 feet.)
Note:
When the Span Power switch is placed in the On (closed) position, the RLX
supplies –130 VDC simplex power to the line.
Note:
The MPU can override or select the Version A RLX hardware switch settings.
These switch settings do not need to be set if the unit provisioning is being performed
through the software.
through the software.
Version B RLX only:
b1 only The following operating parameters are jumper-selectable:
•
Channel Blocking Idle Code (FFhex or 7Fhex)
•
Line (span) Power (–130 VDC only on the B1 RLX; –130 VDC or ±130 VDC
on the B2 RLX+)