cc/td/doc/product/atm/ls1010s/wa5/12/12_0_9
hometocprevnextglossaryfeedbacksearchhelp
PDF

Table of Contents

The 4-Port OC-12c Interface Module

The 4-Port OC-12c Interface Module

This chapter describes the 4-port OC-12c interface module that is supported in the
Catalyst 8540 MSR.

This chapter includes the following sections:

Overview of the OC-12c Interface Module

The OC-12c interface module is used for intercampus or wide-area links. The OC-12c interface module supports a dual SC-type connector.

The following OC-12c interface modules are described in this chapter:

Interface Ports Supported

The Catalyst 8540 MSR supports up to a maximum of eight OC-12c interface modules with a maximum of 32 OC-12c interface ports.

Note The Catalyst 8510 MSR, Catalyst 5500, and LightStream 1010 do not support the 4-port OC-12c interface module.

Figure 7-1 shows an OC-12c interface module. The four ports are available in either single-mode or multimode connectors.


Figure 7-1: The OC-12c Interface Module


ATM Connections Supported

The OC-12c interface module has four ports that provide the following ATM connections, as shown in Figure 7-2:


Figure 7-2: OC-12c Interface Module Short and Intermediate Reach ATM Connections


Cabling the OC-12c Interface Module

This section describes supported cabling configurations for the OC-12c interface module, which provides multimode and single-mode connections.

Note All ATM interfaces are full duplex and are composed of two fibers, one for each link direction. You must use the appropriate ATM interface cable to connect the ATM single-mode or multimode interface with an external ATM network. You should not mix single-mode or multimode ports or cables.

OC-12c Interface Module Supported Interfaces

The OC-12c interface module can support interfaces that connect to the following physical layers:

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

OC-12c Interface Module Connectors

To connect the OC-12c multimode or single-mode interface modules to other OC-12c equipment via an optical link, use a dual SC-type connector for multimode and single-mode fiber-optic traffic. (See Figure 7-3.)

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

Figure 7-3: OC-12c Fiber-Optic Connections and LEDs


Caution
If you are attaching a short cable to the OC-12c intermediate reach port adapter, you must add 10 dB of attenuation in the interface or the transmitter can overdrive the receiver and introduce data errors.

OC-12c Interface Module LEDs

The LEDs provide status information for the individual OC-12c single-mode and multimode fiber-optic connections. The LEDs are described in Table 7-1 and shown in Figure 7-3.


Table 7-1: OC-12c Interface Module LED Descriptions
LED Description

LINK

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.


hometocprevnextglossaryfeedbacksearchhelp
Posted: Thu May 6 13:50:14 PDT 1999
Copyright 1989-1999©Cisco Systems Inc.