Cabletron Systems E3100 Manual De Usuario
Page 3-8
MAKING NETWORK CONNECTIONS
•
Length -
The maximum fiber optic cable length is 2 km (6558
feet), if system budgets are met. However, IEEE 802.3 FOIRL
(Fiber Optic Inter-Repeater Link) specifications specify a
maximum of 1 km (3279 feet).
(Fiber Optic Inter-Repeater Link) specifications specify a
maximum of 1 km (3279 feet).
3.3.2 Fiber Optic Interface (Fiber Optic Ports)
Ex040 and Ex040-X:
ST fiber optic ports
Parameter
Typical
Worst
Worst
Typical
Value
Case
Case
Budget
Receive
Budget
Sensitivity:
-30.5 dBm -28.0 dBm
—
—
Peak Input
Power:
Power:
-7.6 dBm
-8.2 dBm
—
—
Transmitter Power:
50/125
µ
m fiber: -13.0 dBm -15.0 dBm
13.0 dB
17.5 dB
62.5/125
µ
m fiber: -10.0 dBm -12.0 dBm
16.0 dB
20.5 dB
100/140
µ
m fiber: -7.0 dBm
-9.0 dBm
19.0 dB
23.5 dB
Error Rate:
Better than 10
-10
bit error rate.
NOTE:
The transmitter power levels and receive sensitivity levels given
above are Peak Power Levels after optical overshoot. A Peak Power Meter
must be used to correctly compare the values given above to those
measured on any port. If Power Levels are measured with an Average
Power Meter, add 3 dBm to the average power measurement to correctly
compare average power values to the peak power values.
must be used to correctly compare the values given above to those
measured on any port. If Power Levels are measured with an Average
Power Meter, add 3 dBm to the average power measurement to correctly
compare average power values to the peak power values.