Cabletron Systems E1100 - Manual (Page 36)

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).
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:
-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.