SAGEM 3P@C

1.1.1.16Interface features of the DS-1GSX module

Table 2-12 Interface features of the DS-1GSX module

Module

Quantity

Interface

Interface

Fiber

Transmi

type

of

type

attributes

specifications

ssion

 

interfaces

 

 

 

distance

DS-1GSX

1

SC

1000Base-

62.5/125 µmmulti-

 

 

 

 

SX

mode fiber with a

275m

 

 

 

 

wavelength of 850

 

 

 

 

 

 

 

 

 

nm

 

 

 

 

 

50/125 µm multi-

 

 

 

 

 

mode fiber with a

550m

 

 

 

 

wavelength of 850

 

 

 

 

 

 

 

 

 

nm

 

The fiber system is divided into two types by the optical transmission mode: Multi-mode fibers and single-mode fibers. A multi-mode optical fiber is a fiber that transmits signals in multiple modes at a given wavelength. Phase difference may occur in the multi-mode transmission because the lights of different modes will transfer at different speeds along a line. As a result, transmission distortion will occur and thus the transmission band will be restricted. Two specifications are available now for the cores of multi-mode optical fibers: 62.5 µm and 50 µm. In ISO/IEC 11801, both the two modes are recognized transmission media.

2.5.3.2-port 100M Multi-mode Optical Interface Module (DS-2FMM)

The DS-2FMM module provides 2 100M multi-mode fast Ethernet optical interfaces. The physical interface is a standard SC optical interface and the multi-mode fiber is used whose maximum transmission distance is 2 km. Two pairs of multi-mode fibers are required for it. The fiber length and peer interface type depend on the real situation.

1.1.1.17Structure of the DS-2FMM module

The front panel of the DS-2FMM module is shown in the Figure 2-22:

Figure 2-22 Front view of the DS-2FMM module

DS-2FMM 100M interface module

SC multi-mode optical interface

Status LED

The front panel of the DS-2FMM module is composed of the following parts:

„2 standard SC 100M multi-mode optical interfaces

„2 LINK status indicator

„2 ACT status indicator

3P@C Installation Manual

Page 2-18

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