ADC Broadband System 用户手册

ADCP-61-471 • Issue 4 • June 2000 • Section 2: Operation and Maintenance

2-49

DLP-512

Page 1 of 2

DS3 MUX APS TEST

Summary:

This procedure provides instructions for verifying that the APS (Automatic

Protection Switching) feature of the DS3 MUX module is working. Both working (online) and
protect (offline) DS3 MUX modules are tested.

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.

1. Identify the offline DS3 MUX. Its STATUS indicator is green and its ONLINE indicator is

extinguished.

2. Slide the offline DS3 MUX part way out. This disconnects the DS3 MUX from the Soneplex

Broadband system and ensures that data passes through the online DS3 MUX only.

3. Perform end-to-end test and verify error-free data.

4. Set up the Soneplex Broadband system and to perform end-to-end tests between chassis and

remote unit.

Reference:

DLP-510

ODS2 Distribution System and QFLC/QLX Chassis End-to-End

Tests

Reference:

DLP-520

HLXC and HLXR End-to-End Tests

Reference:

DLP-522

DLX- or RLX-Equipped Circuit End-to-End Tests

5. Using the DS3 MUX ejectors, press the module into the chassis until it is properly seated.

6. Verify that the STATUS indicator on the offline DS3 MUX is green and the ONLINE

indicator is extinguished.

7. Verify that the STATUS indicator on the online DS3 MUX is green and the ONLINE

indicator is green.

8. If the online DS3 MUX APS LOCKOUT/FORCE indicator is on, hold the ENABLED

button down and momentarily press LMPTST/APS to extinguish the APS indicator.

9. Slide the online DS3 MUX partly out to cause an APS.

10. Verify that the DS3 MUX that was offline is now online (its ONLINE indicator is green).