Ericsson LBI-39001 Betreibershandbuch PDF herunterladen (Seite 20)

If the MUX was not delivered correctly configured by the manufacturer or if the MUX and/or cards are being replaced,

then the MUX should be reconfigured as shown below. The ACU module of the MUX is used to complete work on the first

five items. The last three items are performed with switches on the MUX channel cards.

NEC ND4E FPA

• DG-A is enabled.

• DG-B is disabled.

• Framing is ESF.

• Line Coding is B8ZS.

• CLKA is NDDS and LOOP.

• E&M VF channel card TX Attenuation is 16 dBm.

• E&M VF channel card RX Attenuation is 0 dBm.

• E&M VF channel card switch is in BUSY position.

There are two visual indications that the MUX is operating properly:

1. The MAJ and MIN alarm LEDs and the various “Fail” LEDs on the front of the MUX are not illuminated (these

LEDs illuminate when the MUX is not working properly).

2. The PI terminal does not display the message “MUX trunk alarm” on the screen. This message is only displayed

when the MUX is working improperly.

3.1.3.2.1. Trunk Processing Memory Clear (ND4E only)

This procedure is performed whenever power is cycled to extinguish the blinking green ALM LED on the ACU board.

Data stored previously are cleared in order of the occurrence of CGA in the TP memory.

1. Verify that the display on ACU(DS1) indicates either ND4E or SYS:

If ND4E is indicated, go to step 2.

If SYS is indicated, go to step 5.

2. Press the right or left arrow key to indicate SYS.

3. Verify that the display on ACU(DS1) indicates SYS:

If YES, go to step 5.

If NO, go to step 4.

4. Press the RTN key until SYS is indicated, and go to step 5.

5. Press the ENTR key.

6. Verify that the display on ACU(DS1) indicates EQPT.

7. Press the right arrow key to indicate CONT, and press the ENTR key.

8. Verify that the display on ACU(DS1) indicates TPMC, and press the ENTR key.

9. Verify that the display on ACU(DS1) indicates DG-A or DG-B.

10. Note: DG-A is Digroup A and DG-B is Digroup B.

Select DG-A or DG-B by using the left or right arrow keys and press the ENTR key.

11. Verify that the display on ACU(DS1) indicates CONT.

12. Press the RTN key to return to SYS.

13. The procedure is completed.

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Ericsson LBI-39001 Betreibershandbuch Seite 20