GarrettCom 4K16 Manual De Usuario
Magnum 4K16 Switches Installation and User Guide
(12/05)
22
www GarrettCom com
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Worst case OPB = OPB - 1dB(for LED aging) - 1dB(for insertion loss)
Worst case distance = {Worst case OPB, in dB} / [Cable Loss, in dB/Km]
where the “Cable Loss” for 62.5/125 and 50/125
µm
(M.m) is 2.8 dB/km,
and the “Cable Loss” for 100/140 (Multi-mode) is 3.3 dB/km,
and the “Cable Loss” for 9/125 (Single-mode) is 0.5 dB/km
The following data has been collected from component manufacturer’s (HP’s and
Siemens’) web sites and catalogs to provide guidance to network designers and installers.
Fiber
Port
Module
Speed,
Std.
Mode
Std.
km
fdx
fdx
(hdx)
Wave
-
length
nm
Cable
Size
µm
X’mitr
Output
P
T ,
dB
R’cvr
Sens.
P
R ,
dB
Worst
OPB,
dB
Worst*
distance
Km, fdx
Km, fdx
typical
OPB,
dB
typical*
distance
Km, fdx
Km, fdx
FKM-
MST, MSC
100Mb
FX
Multi-
mode
2
(0.4)
1300
62.5/125
50/125
-20
-23.5
-31
-31
9.0
5.5
2.5
2.0
14
12
5
4
FKM-SSC
100Mb
FX
Single-
mode
18+
(0.4) 1300
9/125 -15 -31 14 28
17.5 35
FKM-
MTRJ
MTRJ
100Mb
FX
Multi-
mode
2
(0.4)
1300
62.5/125
50/125
-20
-23.5
-31
-31
9.0
5.5
3.0
2.0
15.8
12.2
5.5
4.0
FKM-SSCL 100Mb
FX
Single-
mode
40
(0.4) 1300
9/125 -5 -34 29 58 32.5 65
* Note: The use of either multi-mode or single-mode fiber to operate at 100Mbps speed
over long distances (i.e., in excess of approx. 400 meters) can be achieved
only
if the following factors are both applied:
•
The 100Mb fiber segment must operate in full-duplex (FDX) mode, i.e. the
full-duplex (factory default) setting for 100Mbps fiber ports must be used,
and
full-duplex (factory default) setting for 100Mbps fiber ports must be used,
and
•
The worst-case OPB of the fiber link must be greater than the fiber cable’s
passive Attenuation.
passive Attenuation.
(Attenuation = Cable loss + LED aging loss + Insertion loss + safety factor)