Extreme Networks WM-4T1i Specifikace stáhnout pdf (Strana 167)

Configuring I/O Modules

Extreme Networks Consolidated Hardware Guide 167

The total optical system budget for the GM-WDMi module is 12 dB. Measure cable plant losses with a

1550 nm light source to verify that your cable plant losses are within the optical budget. Table 45

describes the optical specifications for the GM-WDMi module.

Extreme Networks recommends that you reserve 3 dB for losses due to cable splices, connectors, and

operating margin. Table 46 describes the cable attenuation, cable budget, and operating distance for a

variety of cable attentuation ratings for the GM-WDMi module.

A minimum of 2 dB attenuation is required to prevent saturation of the receiver.

LEDs

The GM-WDMi module has the following LEDs:

• Module status

• Port status

For information about the LEDs and their activity on the GM-WDMi module, see “I/O Module LEDs”

on page 176.

Table 45: GM-WDMi optical interface specifications

Parameter Minimum Typical Maximum

Transmitter

Optical output power -5 dBm -3 dBm -1 dBm

Channel 1 wavelength 1495 nm 1501 nm 1507 nm

Channel 2 wavelength 1515 nm 1521 nm 1527 nm

Channel 3 wavelength 1535 nm 1541 nm 1547 nm

Channel 4 wavelength 1555 nm 1561 nm 1567 nm

Receiver

Optical input power sensitivity -17 dBm

Optical input power maximum -1 dBm

Fiber Optic Cable

Back reflection -25 dB

General

Total system budget 12 dBm

Table 46: GM-WDMi maximum transmit distances

Cable Attenuation Cable Budget Maximum Distance

0.20 dB/km 9 dB 45 km

0.25 dB/km 9 dB 36 km

0.30 dB/km 9 dB 30 km

1 2 ... 162 163 164 165 166 167 168 169 170 171 172 ... 335 336

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Extreme Networks WM-4T1i Specifikace Strana 167