3Com 6000 Series Installation Manual page 75

1-port OC-3 ATM MM FIC (3C13882) 1-port OC-3 ATM SM FIC (3C13884) 1-port OC-3 ATM SML FIC (3C13886)75
Interface Optical Fiber
The following figure illustrates the 1-port OC-3 ATM SM panel.
Figure 17 1-port OC-3 ATM SM panel
Figure 18 1-port OC-3 ATM SM panel
The following figure illustrates the 1-port OC-3 ATM SML panel
Figure 19 1-port OC-3 ATM SML
The following table describes the LEDs on the card panels.
Table 15 LED description of the ATM cards
OFF means the link is not connected and ON means the link is
LINK
connected.
OFF means no data is being transceived on the interface and blinking
ACT
means data is being transceived.
1-port OC-3 ATM MM uses multi-mode optical fibers and 1-port OC-3 ATM SM,
1-port OC-3 ATM SML use single-mode optical fibers. As all these three interface
cards adopt SC optical fiber connectors, the connectors of the optical fibers must
also be SC connectors. The external optical cable suite provides the users with
optical cables of variable lengths. For the connector appearance, optical cable
connection and the safety precautions, refer to the section 8.5.5 Connect
Interface Optical Fiber.
CAUTION: Laser Danger! Do not stare at the optical fiber connector connected
with the laser in case the invisible laser radiation harms your eyes.
1-port OC-3 ATM SML adopts long-distance fiber interface, requiring a
transmission at least longer than 25km. If the transmission distance is lower than
25km, the interface will be unable to receive signals.