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Maintaining the PTX5000 Chassis

 

Routine Maintenance Procedures for the PTX5000

Purpose

For optimum performance, perform preventive maintenance procedures.

Action

On a regular basis:

  • Inspect the installation site for moisture, loose wires or cables, and excessive dust. Make sure that airflow is unobstructed around the PTX5000 and into the air intake vents.

  • Check the status-reporting devices on the craft interface: system alarms, LEDs, and the craft interface display.

  • Inspect all air filters in the PTX5000 for dust and debris.

    As a general guideline, we recommended that you replace the filter elements every 6 months for routers operating in a typical environment. The filter elements degrade over time, and replacement intervals will vary by operating environment.

    Note

    Do not run the PTX5000 for more than a few minutes without all the air filters in place.

Tools and Parts Required to Maintain PTX5000 Components

To maintain the hardware components, you need the following tools and parts:

  • ESD grounding wrist strap

  • Flat-blade (–) screwdriver

  • Phillips (+) screwdriver, number 1

  • Phillips (+) screwdriver, number 2

Tools and Parts Required for Replacing PTX5000 Hardware Components

To replace hardware components, you need the tools and parts listed in Table 1.

Table 1: Tools and Parts Required for Component Replacement

Components

Tool or part

All

Electrostatic discharge (ESD) grounding wrist strap

AC PDU

Phillips (+) screwdrivers, number 2

1/5-in. (5.5-mm) slotted screwdriver

AC power cord

Phillips (+) screwdrivers, number 2

1/5-in. (5.5-mm) slotted screwdriver

Air filter

Phillips (+) screwdrivers, numbers 1 and 2

Control Board

Phillips (+) screwdrivers, numbers 1 and 2

Electrostatic bag or antistatic mat

Blank panel (if component is not reinstalled)

CCG

Phillips (+) screwdrivers, numbers 1 and 2

Craft interface

Phillips (+) screwdrivers, numbers 1 and 2

DC PDU

Phillips (+) screwdrivers, numbers 1 and 2

7/16-in. (11-mm) nut driver

Caution: You must use an appropriate torque-controlled tool to tighten the nuts. Applying excessive torque damages the terminal studs and the PDU input power trays.

DC power cable

7/16-in. (11-mm) nut driver

Caution: You must use an appropriate torque-controlled tool to tighten the nuts. Applying excessive torque damages the terminal studs and the PDU input power trays.

Fan tray

Phillips (+) screwdrivers, numbers 1 and 2

FPC

Phillips (+) screwdrivers, numbers 1 and 2

Blank panel (if component is not reinstalled)

Electrostatic bag or antistatic mat

PIC

Phillips (+) screwdrivers, numbers 1 and 2

Rubber safety cap for fiber-optic PICs or fiber-optic PIC cables

Electrostatic bag or antistatic mat

Blank panel (if component is not reinstalled)

Routing Engine

Phillips (+) screwdrivers, numbers 1 and 2

Electrostatic bag or antistatic mat

Blank panel (if component is not reinstalled)

SIB

Phillips (+) screwdrivers, numbers 1 and 2

Electrostatic bag or antistatic mat

Blank panel (if component is not reinstalled)

Replacing a PTX5000 Craft Interface

Removing a PTX5000 Craft Interface

The craft interface is located on the upper front of the PTX5000 chassis. The craft interface weighs approximately 2.6 lb (1.2 kg). The craft interface is hot-insertable and hot-removable.

To remove the craft interface (see Figure 1):

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  2. Loosen the screws at the four corners of the craft interface, using a number 2 Phillips (+) screwdriver.
  3. Grasp the craft interface, and support it a few inches in front of the chassis.
  4. Locate the ribbon cable behind the left side of the craft interface.
  5. Squeeze the latches on either side of the ribbon cable connector where it attaches to the rear of the craft interface, and gently disconnect the cable.
Figure 1: Removing the Craft Interface
Removing the
Craft Interface

Installing a PTX5000 Craft Interface

To install the craft interface (see Figure 2):

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  2. Locate the ribbon cable on the left side.
  3. Squeeze the latches on either side of the ribbon cable connector where it attaches to the rear of the craft interface, and connect the cable.
  4. Grasp the craft interface, and press it into the chassis.
  5. Tighten the screws at the four corners of the craft interface, using a number 2 Phillips (+) screwdriver.
Note

After you install the craft interface in an operating PTX5000, allow several minutes for the LEDs on the craft interface to reflect the current state of the PTX5000.

Figure 2: Installing a Replacement Craft Interface
Installing
a Replacement Craft Interface

Maintaining the PTX5000 Centralized Clock Generators

Purpose

For optimum performance, verify the condition of the CCGs.

Action

On a regular basis:

  • Check the CCG LEDs. For more information, see PTX5000 Centralized Clock Generator LEDs.

    During normal operations:

    • The green OK LED on the CCG faceplate is lit.

    • The yellow FAIL LED on the CCG faceplate is not lit.

  • Issue the show chassis environment ccg command to display information about the CCGs.

Replacing a PTX5000 Centralized Clock Generator

Removing a Centralized Clock Generator

The PTX5000 can have one or two CCGs installed. The CCGs are located in the upper rear of the chassis, above the Control Boards and Routing Engines. Each CCG weighs approximately 1.9 lb (0.9 kg).

A nonredundant CCG is hot-pluggable. For redundant CCGs, the master CCG is hot-pluggable. The backup CCG is hot-removable and hot-insertable if the master CCG is functioning. Removing the backup CCG does not affect the functioning of the PTX5000. Taking the master CCG offline might result in a brief loss of SONET clock lock while the backup CCG becomes the master.

To remove a CCG (see Figure 3):

  1. Place an electrostatic bag or antistatic mat on a flat, stable surface.
  2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  3. Press the online/offline button on the CCG faceplate and hold it down until the LED goes out (about 5 seconds).
  4. Loosen the captive screws on the edges of the CCG faceplate.
  5. Grasp the CCG by the handle on the faceplate and slide it out of the chassis.
  6. Place the CCG on the antistatic mat.
Figure 3: Removing a CCG
Removing a CCG

Installing a Centralized Clock Generator

To install a replacement CCG (see Figure 4):

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  2. Carefully align the sides of the CCG with the guides in the CCG slot.
  3. Grasp the CCG by its handle and slide it straight into the chassis until it contacts the midplane.
  4. Tighten the captive screws on the corners of the CCG faceplate.
  5. To bring the CCG online, press the online/offline button until the green OK LED lights.
  6. To verify that the CCG is installed correctly and is functioning normally, check the LEDs on the CCG faceplate. The green OK LED should light steadily. If the CCG is the master, the blue MASTER LED should also light steadily.

    To check the status of the CCGs, use the following CLI command:

    user@host> show chassis environment ccg
Figure 4: Installing a CCG
Installing a CCG

Replacing a Cable Between a PTX5000 CCG and an External Clocking Device

Removing a Cable for an External Clocking Device From a PTX5000 CCG

To remove a cable with RJ-48 connectors from a BITS A or BITS B port on the CCG:

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  2. Disconnect the cable from the T1 external clocking device.
  3. Disconnect the cable from the BITS A or BITS B port on the CCG.

Installing a Cable Between an External Clocking Device and a PTX5000 CCG

To connect a cable with RJ-48 connectors to an BITS A or BITS B port on the CCG:

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  2. Plug one end of the cable into the appropriate BITS A or BITS B port on the CCG.
  3. Plug the other end of the cable into the T1 external clocking device.
  4. Verify that the LINK LED for the port is lit steadily green, and that the FAULT LED is not lit.
  5. Issue the show chassis synchronization command to check the status of the port.
    user@host> show chassis synchronization