Cisco 7100 Series and the PA-4B-U

This chapter provides information on the PA-4B-U port adapter and its use in Cisco 7100 series routers. This chapter contains the following sections:

Installation Overview

The PA-4B-U can be installed in port adapter slot 3 in the Cisco 7120 series, and in port adapter slot 4 in the Cisco 7140 series. Figure 4-1 shows port adapter slot 3 of a Cisco 7120 series router. Figure 4-2 shows port adapter slot 4 of a Cisco 7140 series router.

Figure 4-1: Cisco 7120 Series Router---Port Adapter Slot 3 Location

Figure 4-2: Cisco 7140 Series Router---Port Adapter Slot 4 Location

Depending on your circumstances, you might need to install a new port adapter in a Cisco 7100 series router or replace a failed port adapter in the field. All port adapters available for the Cisco 7100 series connect directly to the router and are locked into position by a locking tab with two screws (see Figure 4-1 or Figure 4-2). You need a number 2 Phillips screwdriver to loosen the screws.

Note Cisco 7100 series routers support online insertion and removal (OIR); therefore, you do not have to power down the router when removing and replacing a port adapter.

When a port adapter slot is not in use, a blank port adapter must fill the empty slot to allow the router to conform to EMI emissions requirements and to allow proper airflow across the port adapters. If you plan to install a new port adapter in a slot that is not in use, you must first remove a blank port adapter.

Removing a Port Adapter

Follow these steps to remove a port adapter from a Cisco 7100 series router:

Step 1 Attach an ESD-preventive wrist strap between you and the chassis. (See Figure 4-1 or Figure 4-2 for the location of the ESD plug.)

Step 2 Use a number 2 Phillips screwdriver to loosen the screws on the locking tab; then slide the tab down to the unlocked position. (See Figure 4-1 or Figure 4-2.)

Step 3 Grasp the handle on the port adapter and pull the port adapter from the router, about halfway out of its slot. If you are removing a blank port adapter, pull the blank port adapter completely out of the chassis slot.

Note

Step 4 With the port adapter halfway out of the slot, disconnect all cables from the port adapter.

Step 5 After disconnecting the cables, pull the port adapter from its chassis slot.

Caution
Always handle the port adapter by the carrier edges and handle; never touch the port adapter's components or connector pins. (See Figure 4-3.)

Figure 4-3: Handling a Port Adapter

Step 6 Place the port adapter on an antistatic surface with its components facing upward, or in a static shielding bag. If the port adapter will be returned to the factory, immediately place it in a static shielding bag.

Step 7 Install a blank port adapter or replacement port adapter to maintain proper flow of cooling air across the internal components. For procedures on how to install a port adapter, see the next section, "Installing a Port Adapter."

Note

This completes the procedure for removing a port adapter from a Cisco 7100 series router.

Installing a Port Adapter

Follow these steps to install a new port adapter in a Cisco 7100 series router:

Step 1 Attach an ESD-preventive wrist strap between you and the chassis. (See Figure 4-1 for the location of the ESD plug.)

Step 2 Ensure that the locking tab is down in the unlocked position. If it is locked, use a number 2 Phillips to loosen the screws; then slide the tab down to the unlocked position. (See Figure 4-1 or Figure 4-2.)

Step 3 Remove the new port adapter from its antistatic container and position it at the opening of the slot.

Step 4 Use both hands to grasp the port adapter by its metal carrier edges, and position the port adapter so that its components face downward. (See Figure 4-3.)

Step 5 Align the left and the right edge of the port adapter metal carrier between the guides in the port adapter slot. (See Figure 4-4.)

Step 6 With the metal carrier aligned in the slot guides, gently slide the port adapter halfway into the slot.

Caution
Do not slide the port adapter all the way into the slot until you have connected all required cables. Trying to do so disrupts normal operation of the router.

Figure 4-4: Aligning the Single-Width Port Adapter Between the Slot Guides

Step 7 With the port adapter halfway in the slot, connect all required cables to the port adapter.

Step 8 After connecting all required cables, carefully slide the port adapter all the way into the slot until the port adapter is seated in the router.

Step 9 After seating the port adapter in the router, slide the locking tab up to the locked position and tighten the screws. (Figure 4-1 or Figure 4-2 shows the locking tab in the locked position.)

This completes the procedure for installing a new port adapter in a Cisco 7100 series router. Proceed to "Installing the PA-4B-U Interface Cables," to connect the necessary cables to your port adapter.

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