Table Of Contents
Removing and Installing Line Cards
Handling Line Cards
Online Insertion and Removal
Warnings and Cautions
Line Card Removal and Installation
Cisco 7304—Removing and Installing a Line Card
Connecting a SMB Cable
Removing and Installing Line Cards
•
Installation Overview, page 3-1
• Handling Line Cards
• Online Insertion and Removal
• Warnings and Cautions
• Line Card Removal and Installation
• Connecting a SMB Cable
Note When a line card slot is not in use, a blank line card must fill the empty slot to allow the router to conform to electromagnetic interference (EMI) emissions requirements and to allow proper airflow across the line cards. If you plan to install a new line card in a slot that is not in use, you must first remove the blank line card.
Handling Line Cards
Caution Always handle the line card by the carrier edges and handle; never touch the line card components or connector pins. (See
Figure 3-1.)
Figure 3-1 Handling a Line Card
Online Insertion and Removal
The Cisco 7304 router supports online insertion and removal (OIR) of line cards; therefore, you do not have to power down the router when removing and replacing a 6E3 line card on a Cisco 7304 router. The Cisco 7304 router also supports CLI-controlled OIR, which allows active data traffic to complete before the active interfaces are shut down. For more information, see the "CLI-Controlled OIR" section on page 4-18.
Note CLI-controlled OIR is the recommended way of performing OIR on this platform. As you disengage the line card from the router, online insertion and removal (OIR) administratively shuts down all active interfaces on the line card.
Note Before you begin installation, read the "Required Tools and Equipment" section on page 2-1 for a list of parts and tools required for installation.
Warnings and Cautions
Observe the following warnings and cautions when installing or removing line cards.
Caution Do not slide a line card all the way into the slot until you have connected all required cables. Trying to do so disrupts normal operation of the router or switch.
Caution To prevent jamming the carrier between the upper and the lower edges of the line card slot, and to ensure that the edge connector at the rear of the line card mates with the connection at the rear of the line card slot, make certain that the carrier is positioned correctly, as shown in the cutaway in the following illustrations.
Warning During this procedure, wear grounding wrist straps to avoid ESD damage to the card. Do not directly touch the backplane with your hand or any metal tool, or you could shock yourself. Statement 94
Line Card Removal and Installation
In this section, the illustrations that follow give step-by-step instructions on how to remove and install line cards. This section contains the following illustration:
• Cisco 7304—Removing and Installing a Line Card
Tip If a line card lever or other retaining mechanism does not move to the locked position, the line card is not completely seated in the backplane. Carefully pull the line card halfway out of the slot, reinsert it, and move the line card levers to the locked position.
Cisco 7304—Removing and Installing a Line Card
Connecting a SMB Cable
On a 6E3 line card, you can use six SMB cables (one for each E3 link).
Tip If you build your own cables, we strongly recommend that you fasten together your transmit and receive cables along their entire length, as shown in Figure 3-2 . Doing so reduces the effects of EMI. You can use shielded jacketing or tubing for this purpose.
Caution Each E3 link requires separate receive and transmit connections to your external E3 equipment.
Caution When you connect the 10-foot (3.048 meters) shielded SMB cables to the 6E3 line card, be careful not to bend the male cable connector pin when you connect or disconnect the cables.
Caution To prevent system problems and to maintain the proper cable connection sequences, connect the receive and transmit ports on your 6E3 line card as indicated in
Step 2.
To connect the SMB cables to the 6E3 line card, follow these steps:
Step 1 Attach the SMB cables directly to the SMB ports on the 6E3 line card. Attach the SMB ends of the cable to the ports labeled TX and RX. (See Figure 3-2 .)
Step 2 Attach the BNC ends of your SMB cables to your external E3 equipment as follows:
a. Attach the cable from the 6E3 line card TX port to the RX port on your external E3 equipment.
b. Attach the cable from the 6E3 line card RX port to the TX port on your external E3 equipment.
Figure 3-2 Attaching SMB Cables to a 6E3 Line Card
