2 • Hardware installation
Model 6511RC User Manual
38
Installing the network cables
Figure 18. Fiber-optic SC cable connectors
Do the following to connect the dual singlemode fiber-optic cable (see
figure 18
) to the STM-1 SC connectors:
1.
Remove the protective cap from the fiber optic cable connectors.
2.
Attach the transmit fiber-optic cable connector to the
TX
SC connector on the rear blade (see
figure 14
on
page 35).
3.
Attach the receive fiber-optic cable connector to the
RX
SC connector on the rear blade.
Connecting the STM-1 electrical interface to coaxial network cables
The Matrix Switch presents the STM-1 electrical interface on a pair of 75-ohm female BNC connectors, one
for the transmiting (TX) and one for receiving (RX) signals (see
figure 14
on page 35).
For most installations, the coaxial cable connecting the STM-1 WAN port to the SDH network can be no
longer than 325 feet (100 meters).
Note
The Matrix Switch electrical interface transmits a STM-1 signal with
an attenuation margin of 12.7dB at 78 MHz over coaxial cable. The
12.7dB attenuation margin typically results in a transmission distance
limitation of approximately 360 feet (110 meters) for RG-59U
coaxial cable.