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PTX3000 Chassis

PTX3000 Chassis Description

The PTX3000 chassis is a rigid sheet metal structure that houses all the other hardware components (see Figure 1 and Figure 2). The chassis measures 38.5 in. (97.8 cm) high, 10.6 in. (26.9 cm) deep, and 17.6 in. (44.7 cm) wide. The chassis can be installed into many types of racks or cabinets.

The chassis includes the following features:

  • Front-mounting flanges for mounting in a four-post rack or cabinet.

  • Center-mounting metal brackets for center-mounting in an open-frame rack.

  • Handles on each side to facilitate positioning the PTX3000 in the rack.


    Do not use the handles to lift the PTX3000.

  • One electrostatic discharge (ESD) point, a banana plug receptacle (see Figure 3).


    Before removing or installing components, attach an ESD strap to the ESD point, and place the other end of the strap around your bare wrist. Failure to use an ESD strap could result in damage to the hardware components.


    The PTX3000 must be connected to earth ground during normal operation.

    Figure 1 and Figure 2 illustrate the front and rear of a PTX3000 chassis.

    Figure 1: Front View of the PTX3000Front View of the PTX3000
    Upper fan tray
    Routing Engine or RCB Companion Cards
    Upper cable management system
    Control Board or RCB
    Routing Engine or Routing and Control Board (RCB) companion card
    FPC slots 8, 10, 12, and 14 and PIC slots 9, 11, 13, and 15 The IPLCs are installed in any of the FPC or PIC slots.
    Control Board or Routing and Control Board (RCB)
    Lower cable management system
    FPC slots 0, 2, 4, and 6 and PIC slots 1, 3, 5, and 7 The integrated photonic line cards (IPLCs) are installed in any of the FPC or PIC slots.
    Lower fan tray
    Air filter (intake)
    Power cable management system
    Craft interface
    Power supply modules
    Switch Interface Boards (SIBs
    Figure 2: Rear View of the PTX3000Rear View of the PTX3000
    Upper air exhaust
    Lower air exhaust
    Figure 3: ESD Point on the PTX3000ESD Point on the PTX3000

PTX3000 Backplane Description

The backplane is located in the rear of the card cage that contains the chassis components. All components install into the backplane from the front of the chassis. The backplane performs the following major functions:

  • Provides a data path—Data packets are transferred across the backplane from the Packet Forwarding Engine on the originating FPC to the SIBs, and from the SIBs across the backplane to the Packet Forwarding Engine on the destination FPC.

  • Enables power distribution—The power supply modules (PSMs) are connected to the backplane. The backplane distributes power to all the PTX3000 components.

  • Provides a signal path—The backplane provides the signal path to the FPCs, SIBs, host subsystem, and other system components for monitoring and control of the system.

PTX3000 Cable Management System

The cable management system for the PTX3000 organizes, supports, and provides strain relief for the PIC or IPLC cables. The PIC or IPLC cables are routed from the cable management system to both sides of the PTX3000, keeping the cables organized and securely in place. The cable management system adds 1.9 in. (4.8 cm) to the depth of the chassis. Figure 4 shows the cable management system.


We recommend that you use the cable management system to maintain the cable bend radius.

Figure 4: Cable Management SystemCable Management System

The cable management system consists of an upper cable management system (Figure 5) above the PICs in slots 1, 3, 5, and 7, and a lower cable management system (Figure 6) below the PICs in slots 9, 11, 13, and 15. In addition, a power cable management system manages the DC power cables (see PTX3000 Description).

Figure 5: Upper Cable Management SystemUpper Cable Management System
Figure 6: Lower Cable Management SystemLower Cable Management System

PTX3000 Craft Interface Description

The craft interface—sometimes called a front panel display (FPD)—is located to the left of Switch Interface Boards (SIBs). It is hot-insertable and hot-removable. The craft interface allows you to view status information about the PTX3000 at a glance.

Craft Interface Components

Figure 7 shows the craft interface.

Figure 7: Craft InterfaceCraft Interface
Alarm relay contacts
FANTRAYS LEDs labeled 0 and 1
ACO/LT button
S and M configuration switch

The front panel of the craft interface contains:

  • Alarm relay contacts, which connect the router to external alarm devices. Whenever a system condition triggers either the red (major) or yellow (minor) alarm on the craft interface, the alarm relay contacts are also activated. The terminal blocks that plug into the alarm relay contacts are supplied with the router.

  • The S and M configuration switch, which must be set to S

  • ACO/LT button. To deactivate red and yellow alarms, press the button labeled ACO/LT (alarm cutoff/lamp test). Causes all LEDs on the craft interface to light (for testing purposes), when pressed and held.

  • LEDs

PTX3000 Craft Interface LEDs

Alarm LEDs

Two large alarm LEDs are located on the craft interface (see Figure 8). Both LEDs can be lit simultaneously.

  • The circular red LED lights to indicate a critical condition that can result in a system shutdown.

  • The triangular yellow LED lights to indicate a less severe condition that requires monitoring or maintenance.

Figure 8: Craft Interface Alarm LEDsCraft Interface Alarm LEDs

Table 1 describes the alarm LEDs.

Table 1: Alarm LEDs on the PTX3000 Craft Interface






On steadily

Critical alarm LED—Indicates a critical condition that can cause the PTX3000 to stop functioning. Possible causes include component removal, failure, or overheating.


On steadily

Warning alarm LED—Indicates a serious but nonfatal error condition, such as a maintenance alert or a significant increase in component temperature.

Fan Tray LEDs

One status LED for each fan tray—labeled 0 and 1—is located on the craft interface (Figure 9).

Figure 9: Craft Interface Fan Tray LEDsCraft Interface Fan Tray LEDs
FANTRAYS LEDs labeled 0 and 1
Table 2: Fan Tray LEDs on the Craft Interface





On steadily

The fan tray is functioning normally.


On steadily

The fan tray has failed.


The fan tray is offline or absent.