622-Mbps Port Adapters

This chapter describes the 622-Mbps SONET STS-12c/SDH STM-4c port adapter that is supported in the following ATM systems:

• Catalyst 8540 MSR
  
  
• Catalyst 8510 MSR
  
  
• LightStream 1010
  
  
• Catalyst 5500
  
  

This chapter includes the following sections:

• About 622-Mbps Port Adapters
  
  
• Cabling 622-Mbps Port Adapters
  
  

About 622-Mbps Port Adapters

The 622-Mbps SONET STS-12c/SDH STM-4c port adapter is used for intercampus or wide-area links. The 622-Mbps port adapter supports an SC-type connector.

Interface Ports Supported

The ATM switch router supports any port adapter combination required. Table 7-1 identifies the maximum number of 622-Mbps interface ports supported in
each system.

Figure 7-1 shows a 622-Mbps port adapter that supports single-mode connectors.

Figure 7-1: 622-Mbps Port Adapter with a Single-Mode Connector

ATM Connections Supported

The 622-Mbps port adapter has a single port that provides the following ATM connections, as shown in Figure 7-2:

• 622-Mbps single-mode and single-mode long reach connections provide either WAN or intercampus ATM connections.
  
  
• 622-Mbps multimode connections provide intercampus ATM connections.
  
  

Figure 7-2: 622-Mbps Port Adapter ATM Intercampus and WAN Connections

Cabling 622-Mbps Port Adapters

This section describes supported cabling configurations for the 622-Mbps port adapter, which provides single-mode, multimode, and single-mode long reach connections.

Note   All ATM interfaces are full duplex. You must use the appropriate ATM interface cable to connect the ATM single-mode or multimode interface with an external ATM network.

622-Mbps Port Adapter Supported Interfaces

The 622-Mbps port adapter can support interfaces that connect to the following physical layers:

• SONET 622-Mbps multimode fiber-optic—STS-12c/STM-4c
  
  
• SONET 622-Mbps single-mode fiber-optic—STS-12c/STM-4c
  
  

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Note   See Table B-1 for cabling requirements.

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622-Mbps Port Adapter Connectors

To connect the 622-Mbps multimode or single-mode port adapters to the external ATM switch router, use an SC-type connector for multimode, single-mode, or single-mode long reach fiber-optic traffic. (See Figure 7-3.)

Note   See "Connectors and Connector Pinouts," for more information about the SC-type connector.

Figure 7-3: 622-Mbps Fiber-Optic Connections and LEDs

Caution   If you are attaching a short cable to a long reach port adapter, you must add 10 dB of attenuation in the line or the transmitter can overdrive the receiver and introduce data errors.

622-Mbps Port Adapter LEDs

The LEDs provide status information for the individual 622-Mbps single-mode and multimode fiber-optic connections. The LEDs are shown in Figure 7-3 and described in Table 7-2.