Cisco CSC-C2FCIT Instalacja i aktualizacja - Strona 3

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Figure 1

FDDI Connections

The distance limitations for single-mode and multimode FDDI stations are listed in Table 1. Both

FDDI modes provide 11 decibels (dB) of optical power.

Table 1

Transceiver

Type

Single-mode

Multimode

FDDI Appliques

The ﬁber-optic transceivers reside on circuit cards called appliques that provide the interface

between external network connections and the internal CSC-FCI card. The four applique

conﬁgurations are shown in Figures 2 through 5; each provides a unique combination of single-mode

and/or multimode FDDI interfaces.

Following are the four FDDI applique mode combinations:

•

PHY-A multimode, PHY-B multimode (APP-LMM), Figure 2

•

PHY-A multimode, PHY-B single mode (APP-LMS), Figure 3

•

PHY-A single mode, PHY-B multimode (APP-LSM), Figure 4

•

PHY-A single mode, PHY-B single mode (APP-LSS), Figure 5

Both the single-mode and multimode transceivers provide a Class A dual attachment interface that

can be connected to either a Class A or Class B station. Class A is a dual attachment station (DAS)

with primary and secondary rings; Class B is a single attachment station (SAS) with only a primary

ring.

CSC-C2FCIT (FDDI) Card—Component-Side View

FDDI A, E, I, M

FDDI B, F, J, N FDDI C, G, K, O

FDDI Maximum Transmission Distances

Maximum Distance Between

Stations

Up to 6.2 mi (10 km)

Up to 1.2 mi (2 km)

Installing and Upgrading the CSC-C2FCIT FDDI Card and Appliques

Serial

PROM

U34

FDDI D, H, L, P

FDDI Module Overview

Microcode

EPROM

U32