Allied Telesis SWITCHBLADE 4000 Информационный лист - Страница 5

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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)

dBm loss allowed Max = Transmitter dBm min avg. - Receiver sensitivity max avg. - (2 x 1dBm per connector) - 3dBm buffer

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.

Max power received before transceiver stops receiving correctly.

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

Receiver

dBm loss allowed

Sensitivity Max

Max.

dBm

(of same card)

-31

2.5

50um MMF

1300

850

1.5

3.5

Minimum distance

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.

-14