Allied Telesis SWITCHBLADE 4000 Datenblatt - Seite 5

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Allied Telesis SWITCHBLADE 4000 Datenblatt
SWITCHBLADE
Power Outputs for Optical Ports
Card
Wave Length
AT-SB4352
1310nm
32 port (MT-RJ)
AT-SB4352
1310nm
32 port (MT-RJ)
Maximum fibre attenuation per km from IEEE 802.3 Table 38-12
Description
Nominal fibre specification wavelength (nM)
Fibre cable attenuation (max) (dB/km)
1
dBm loss allowed Max = Transmitter dBm min avg. - Receiver sensitivity max avg. - (2 x 1dBm per connector) - 3dBm buffer
2
Minimum distance using IEEE 802.3 fibre attenuation = dBm loss allowed max / Fibre cable attenuation (max)
Note, when calculating the actual distance the attenuation of the fibre optical cable, and all attenuators, must be used. Measurements may be required to determine this attenuation.
3
4
Max power received before transceiver stops receiving correctly.
5
Maximum distances calculated based on an allocation of 1.5dB total connections and splice loss for multi-mode fibre and 2.0dB for single-mode.
Allied Telesis
| Layer 3 Modular Switch
®
4000
Fibre Type
Transmitter
dBm Min
50.0um
-20
62.5um
-23.5
62.5um MMF
850
3.75
1
Receiver
dBm loss allowed
Sensitivity Max
Max.
dBm
(of same card)
-31
6
-31
2.5
50um MMF
1300
850
1.5
3.5
Minimum distance
1
using IEEE 802.3
fibre attenuation
(Km)
2 3
4.0
1.7
10um SMF Unit
1300
1310
1.5
0.5
Received Power
Max. dBm avg.
4
-14
-14
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