GarrettCom Magnum 3000, Инструкция по установке и эксплуатации

Страница: 27 / 59

Magnum 3000 Stackable Hubs Installation and User Guide (07/06)
20
www GarrettCom com . .
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
(hdx)
Wave
-
length
nm
Cable
Size
µ
m
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
RPM-FST,
FSC
10 Mb
FL
Multi-
mode
2
(2)
850
62.5/125
100/140
50/125
-15.0
-9.5
-19.5
-31
-31
-31 14
19.5
9.5
5
5.9
3.4
17
23.5
13.5
6
7
4.8
RPM-
SMF(ST)
10 Mb
FL
Single-
mode
10
(5)
1300 9/125 -30 -39 7 14 13 26
* 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
•
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)
3.1.9 Rack-mounting
Installation of a Magnum 3000s Hub in a 19” rack is a simple procedure. The
units are 1U (1.70”) high. When properly installed, the front-mounted LED status
indicators should be in plain view and easy to read. Rack-mount installation requires
special 19” rack-mounted
brackets and screws
(included with each 3000s
unit). The brackets attach to
the front sides of the Hub,
which is then fastened into a standard 19” RETMA rack.
The 23” brackets and ETSI brackets are also available (optional) for Rack-
mounting of Magnum 3000 units. The 23” brackets are more popular in the Telco
industry where they are a standard for Central Office Rack-mounting purposes. The 23”
brackets are mainly used for larger equipment assemblies in rack mounting frames, and
are frequently accessed in operation from both sides.
Magnum 3000
Stackable Hub
GARRETT