Sagem 4450E - Manual (Page 41)

SAGEM 3P@C
3P@C Installation Manual
Page 2-18 Reproduction and communication in any form prohibited without the written permission of SAGEM SA
1.1.1.16 1.1.1.16 1.1.1.16 1.1.1.16 Interface features of the DS-1GSX module
Table 2-12 Interface features of the DS-1GSX module
Module
type Quantity
of
interfaces Interface
type Interface
attributes Fiber
specifications Transmi
ssion
distance
62.5/125 µm multi-
mode fiber with a
wavelength of 850
nm
275m
DS-1GSX 1 SC 1000Base-
SX
50/125 µm multi-
mode fiber with a
wavelength of 850
nm
550m
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. 2.5.3. 2.5.3. 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.
1.1.1.17 1.1.1.17 1.1.1.17 1.1.1.17 Structure 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