16-Port OC-3c Interface Modules

This chapter describes the 16-port OC-3c interface module that is supported in the
Catalyst 8540 MSR. This chapter includes the following sections:

• About OC-3c Interface Modules
  
  
• Cabling OC-3c Interface Modules
  
  

About OC-3c Interface Modules

The 16-port OC-3c multimode interface module is a high-density module that operates at 155 Mbps. It provides an effective solution for intercampus or wide-area links. The OC-3c interface module enables backbone trunking for networks where edge and server connections scale from 10/100 Mbps to 155 Mbps. The OC-3c interface module supports MT-RJ duplex optical media connectors.

Interface Ports Supported

The Catalyst 8540 MSR supports up to eight OC-3c interface modules with a maximum of 128 OC-3c interface ports. (See Figure 6-1.)

Figure 6-1: OC-3c Interface Module

ATM Connections Supported

The OC-3c interface module provides ATM connections for intercampus applications, backbone trunking, wiring closet and server farm aggregation, and desktop connectivity.

The 16-port OC-3c multimode interface module provides short-reach intercampus and WAN ATM connections up to 500 m. (See Figure 6-2.)

Figure 6-2: OC-3c Interface Module ATM Intercampus and WAN Connections

JATE Approval

The OC-3c port adapter with multimode and single-mode connections meets the Japan Approvals Institute for Telecommunications Equipment (JATE) approval. See Table 6-1 for JATE approval details for the OC-3c port adapter.

Cabling OC-3c Interface Modules

This section describes supported cabling configurations for the OC-3c interface module, which provides multimode connections.

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

OC-3c Interface Module Supported Interfaces

The OC-3c interface module provides an interface to ATM switching fabrics for transmitting and receiving data bidirectionally at up to 155 Mbps. The OC-3c interface module can support interfaces that connect to the OC-3c multimode fiber-optic—STS-3c/STM-1 physical layer.

Note   See Table B-1 for cabling requirements.

OC-3c Interface Module Connectors

To connect the OC-3c interface module to the external ATM switch router, use MT-RJ connectors. See Figure 6-3 for multimode fiber-optic connections with MT-RJ connectors.

Figure 6-3: OC-3c Multimode Fiber-Optic Connections and LEDs

Note   See the "MT-RJ Ethernet Connector Pinouts" section for more MT-RJ connector information.

OC-3c Interface Module LEDs

The LEDs provide status information for the individual OC-3c multimode interface connections. The LEDs are shown in Figure 6-3 and described in Table 6-2.