Table of Contents
The 16-Port OC-3c Interface Module
This chapter describes the 16-port OC-3c interface module that is supported in the
Catalyst 8540 MSR.
This chapter includes the following sections:
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.
The Catalyst 8540 MSR supports up to eight OC-3c interface modules with a maximum of 128 OC-3c interface ports.
Note The Catalyst 8510 MSR, Catalyst 5500, and LightStream 1010 do not support the 16-port OC-3c interface module.
Figure 5-1 shows a 16-port OC-3c multimode interface module.
Figure 5-1: OC-3c Interface Module
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 5-2.)
Figure 5-2: OC-3c Interface Module ATM Intercampus and WAN Connections
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.
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 For descriptions of ATM cabling requirements, see the "ATM Connection Equipment Requirements" section.
To connect the OC-3c interface module to the external ATM switch, use MT-RJ connectors. See Figure 5-3 for multimode fiber-optic connections with MT-RJ connectors.
Figure 5-3: OC-3c Multimode Fiber-Optic Connections and LEDs
Note For a description of the MT-RJ connector, see the "ATM Connection Equipment Requirements" section. (See Figure 2-3.)
The LEDs provide status information for the individual OC-3c multimode interface connections. The LEDs are shown in Figure 5-3 and described in Table 5-1.
Table 5-1: OC-3c Interface Module LED Descriptions
| LED
| State
| Description
|
|---|
LINK
| 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: Fri Nov 5 09:29:55 PST 1999
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