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Cisco MGX 8800/8900 Series Hardware Installation Guide
Releases 2 - 5.2, Part Number OL-4545-01, Rev. H0, May 2006
Chapter5 Installing the Cisco MGX Switch or Gateway
Installing the MGX 8950 Switch
Step11 Attach the end of the wire (from Step 10) with the ring or space lug to the –48 VD C, as shown in
Figure 5-62.
Step12 Attach the ot her end of the wire from Step 10 to the DC source
Step13 Use a Phillips-head screwdriver and two screws to attach the plastic cover over the terminal block on the
DC PEM.
Step14 Turn on the power source and turn the DC PEM power switch on
Step15 Verify that the fans are running by listening or feeling for air movement. The following LEDs should
be lit:
•AC and DC LEDs on each power supply should be green.
•DC OK LED on each DC PEM should be green.
•Status LED on the PXM45 should be green.
•Standby LED on each service module should be yellow.
Connect the External Clock
This step is optional. For information, see “Connect the External Clock” section on page B-7.
Connect the Alarms
Note This step is optional.
Dry contact relay closures are available for forwarding MGX 8950 switch alarms to an alarm system.
Separate visual and audible alarm outputs are available for critic al, major, and minor alarm outputs, and
the outputs are provided through the use of a DB-15 connector on the PXM user interface back card
(PXM-UI-S3 and PXM-UI-S3/B).
Complete the following steps to connect the external clock:
Step1 Verify that you have a PXM-UI-S3 or PXM-UI-S3/B back card installed in slots 7 and 8 in the upper rear
bay of the switch.
Step2 Connect the DB-15 cable to the ALARM port on the PXM-UI-S3 or PXM-UI-S3/B back card.
Note See AppendixB, “Cable Specifications” for cable requirements.
Step3 Connect the other end of the cable to the alarm source.
Connect the MP Connection
Note This step is optional.