Adtran MX2800 M13 User Manual

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61200290L1-1G

Appendix A, Acceptance Test Procedure

MX2800 M13 Multiplexer User Manual

13. Confirm that both power supplies and power feeds are functioning as normal. Front panel LEDs 

identify problems with the power supplies, but the inputs can be tested only via VOM.

The MX2800 can be equipped with either one or two Controller cards. The Controller contains all of the 
MX2800's critical circuitry, including the DS3 interface, DS1 interfaces, management and communica-
tions hardware/firmware, etc. If the MX2800 is equipped with only one Controller, there is no protection 
against failure. If a failure does occur to the Controller, an alarm is initiated; and the front panel LEDs 
reflect the condition. The 

 LED is either solid or flashing red.

If the MX2800 is equipped with two Controller modules, all traffic is protected and can be switched over 
to the Standby Controller in the event of a card failure. The following procedures demonstrate the 
functionality of a Controller switchover:

1. Using the BERT setup that should still be in place from previous testing, ensure that the system is still 

passing traffic error free.

2. Log into the MX2800 (if necessary) via the craft port to get to the Main Menu screen. From there, 

select 

Configuration

, followed by 

Network Interface

 and 

Active Controller

.

3. This procedure shows which Controller (

 or 

) is currently Active. If the 

 Controller is Active, 

select Controller 

 as the Active Controller. Doing so forces a switch to the 

 Controller, which is 

acting as a hot standby. If the 

 Controller is the Active Controller, force a switch to the 

 Controller.

4. Traffic is interrupted momentarily during the switch but quickly returns to error-free performance 

again on the new Controller.

5. Although either Controller can be the Active Controller, for consistency, the 

 Controller should be 

left as the Active one.

Repeat the log-in sequence in Step 2 after each protection switch.

After all Acceptance Tests have been successfully completed, the MX2800 can be restored to its default 
settings by following the procedures below:

1. Log into the MX2800, if necessary, via the craft port. From the Main Menu, select 

Configuration

, 

followed by 

Utilities

 and 

Load Default Settings

.

2. Once the settings have been retrieved and loaded into the system, Command Accepted appears at 

the bottom of the screen. The Standby Controller always maintains an exact copy of the Active 
Controller’s attributes. Confirm that all settings are as expected via the craft port.

3. Normalize all loopbacks as appropriate, and restore all cabling and DSX panels to normal.

Office and Autonomous alarms may be generated as a result of performing Step 3, above. DS3 alarms can 
be cleared by looping the DS3 back toward the MX2800 and setting the MX2800 Timing to 

Local

 via the