Table of Contents

Overview of the 622-Mbps Port Adapter

Interface Ports Supported
ATM Connections Supported

Cabling the 622-Mbps Port Adapter

622-Mbps Port Adapter Supported Interfaces
622-Mbps Port Adapter Connectors
622-Mbps Port Adapter LEDs

622-Mbps Port Adapters

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

• Overview of the 622-Mbps Port Adapter

• Cabling the 622-Mbps Port Adapter

Overview of the 622-Mbps Port Adapter

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 supports any port adapter combination required. Table 6-1 identifies the maximum number of 622-Mbps interface ports supported in
each system.

Table 6-1: Maximum Interface Ports Supported by System Type

System Type	Max. No. of 622-Mbps Interface Ports
Catalyst 8540 MSR	16
Catalyst 8510 MSR	8
Catalyst 5500	8
LightStream 1010	8

Figure 6-1 shows a 622-Mbps port adapter that supports single-mode connectors.

Figure 6-1: 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 6-2:

• 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 6-2: 622-Mbps Port Adapter ATM Intercampus and WAN Connections

Cabling the 622-Mbps Port Adapter

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 For descriptions of ATM cabling requirements, see the "ATM Connection Equipment Requirements" section.

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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, use an SC-type connector for multimode, single-mode, or single-mode long reach fiber-optic traffic. (See Figure 6-3.)

Note For a description of an SC-type connector, see the "ATM Connection Equipment Requirements" section. (See Figure 2-1.)

Figure 6-3: 622-Mbps Fiber-Optic Connections and LEDs

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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.

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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 6-3 and described in Table 6-2.

Table 6-2: 622-Mbps Port Adapter LED Descriptions

LED	State	Description
CD (carrier detect)	Off Green	Carrier detect signal not received Carrier detect signal received
RX (receive)	Off Flashing green Red	Administratively down or LOS1 Cells being received: pulse rate increases with data rate Alarm (LOF2, OCD3, AIS4, LOP5)
TX (transmit)	Off Flashing green Flashing yellow Steady yellow	No transmit line activity and administratively down Cells being transmitted: pulse rate increases with data rate Loopback RDI6

1LOS = loss of signal 2LOF = loss of frame 3OCD = out of cell delineation 4AIS = alarm indication signal 5LOP - loss of pointer 6RDI = remote defect indicator

Posted: Mon May 8 18:50:06 PDT 2000
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