The 622-Mbps Port Adapter

This chapter describes the 622-Mbps SONET STS12/SDH STM4 port adapter that is supported in the following systems:

Catalyst 8540 MSR
Catalyst 8510 MSR
Catalyst 5500
LightStream 1010

This chapter includes the following sections:

Overview of the 622-Mbps Port Adapter

The 622-Mbps SONET STS12/SDH STM4 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 Maximum Number of 622-Mbps Interface Ports

Catalyst 8540 MSR

16

Catalyst 8510 MSR

8

Catalyst 5500

8

LightStream 1010

8

Table 6-1: **Maximum Interface Ports Supported by System Type**
System Type	Maximum Number 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 4
SONET 622-Mbps single-mode fiber-optic---STS-12C/STM 4

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

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 2-2.)

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

Caution
If you are attaching a short cable to the 622-Mbps 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 described in Table 6-2 and shown in Figure 6-3.

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

CD (carrier detect)

Off---Carrier detect signal not received
Green---Carrier detect signal received

RX (receive)

Off---Administratively down or LOS¹
Flashing green---Cells being received: pulse rate increases with data rate
Red---Alarm (LOF², OCD³, AIS⁴, LOP⁵)

TX (transmit)

Off---No transmit line activity and administratively down
Flashing green---Cells being transmitted: pulse rate increases with data rate
Flashing yellow---Loopback
Steady yellow---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.

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

Table of Contents

The 622-Mbps Port Adapter