3com 3500 Guía De Instalación
2
70-km Gigabit Ethernet GBIC Transceiver Installation Guide
Table 1 shows the transmission range and other data for this connection.
Table 2 shows the optical parameters of the
70-km Gigabit Ethernet GBIC.
Safety Precautions
Be sure to follow all safety precautions when you replace a GBIC
transceiver in the system. To avoid electric shocks and burns to yourself
and damage to the equipment, read and follow these warnings:
transceiver in the system. To avoid electric shocks and burns to yourself
and damage to the equipment, read and follow these warnings:
WARNINGS: When the system is on:
■
Never insert a metal object such as a screwdriver or a finger with
jewelry into open module slots.
jewelry into open module slots.
■
Do not touch any connections inside the chassis with your hands or
fingers.
fingers.
Fiber Safety Precautions
The GBIC ports on your system use lasers. To ensure your safety when you
install or work with these GBIC systems, read and comply with the
precautions in this section.
install or work with these GBIC systems, read and comply with the
precautions in this section.
Table 1 70-km Gigabit Ethernet GBIC Single-Mode Transmission Range
Fiber Type
Diameter
(microns)
(microns)
Minimum
Connector End
Polish
Connector End
Polish
Transmission Range
Single-mode
9
µ
m core
PC
10 – 70 km (6.2 – 43.4 mi)
Table 2 Optical Parameters
Parameter
Symbol Min
Typ
Max
Units
Notes/Conditions
Transmitter
Wavelength
λ
c
1540
1550
1570
nm
Optical output
power
power
P
out
–4
N/A
N/A
dBm
Average power
coupled into
single-mode fiber
coupled into
single-mode fiber
Receiver
Optical input
power
power
P
in
–24
N/A
N/A
dBm
BER< 10
-12
with
PRBS 2
7
–1 test data
pattern
@ 1.25Gb/s
@ 1.25Gb/s