GarrettCom MAGNUM DS80F - Manual (Page 20)

Magnum DS80F & DS80C Dual-speed Stackable Hubs Installation and User Guide (05/04)
20
Fiber
Port
Module
Speed,
Std.
Mode
Std. km
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
typical
OPB,
dB
typical*
distance
Km, fdx
DS80F-
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
DS80F-SSC
100Mb
FX
Single-
mode
20
(0.4)
1300 9/125 -15 -31 14 28 17.5 35
DDS80F-
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
Long Reach
100Mb
FX
Single-
mode
40
(0.4)
1300
9/125 -5 -34 29 58
* Note: The use of either multi-mode or single-mode fiber to operate at 100Mbps speed over
long distances (i.e., over 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, and
•
The worst-case OPB of the fiber link must be greater than the fiber cable’s passive
Attenuation.
(Attenuation = Cable loss + LED aging loss + Insertion loss + safety factor)
3.2.6 Connections to NICs which support Auto-Negotiation, RJ-45 ports
The copper ports of Magnum DS80F and DS80C Dual-Speed Hubs will
function properly with NICs (Network Interface Cards) which support Auto-
Negotiation, and the Fast Link Pulse (FLP) coding for the 100BASE-TX signaling
system. When connecting a NIC to the DS80F or DS80C, it may be necessary to
reload the NIC drivers on the user device if the NIC has been communicating with a
protocol other than 100BASE-TX (such as 10BASE-T). When 100Mb operation is
agreed and in use, the SPEED LED is illuminated steady ON. It is OFF if no traffic
or if 10Mbps traffic.
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