3Com Router Module Guide
Chapter 2 Smart Interface Cards
2-22
LP/AL
ON means the interface is in a loopback.
Blinking means an AIS, LFA, or RAI alarm signal is present.
OFF means no loopback or alarm is present.
Note:
AIS = Alarm indication signal; LFA = loss of frame alignment; RAI = Remote alarm indication
2.5.5 Interface Cable
ROUTER 1-PORT FRACTIONAL T1 SIC interface cable is 100-ohm standard
shielded network cable that has RJ-45 connectors at both ends. The following figure
illustrates a ROUTER 1-PORT FRACTIONAL T1 SIC interface cable:
Figure 2-22
T1 cable
Caution:
Relevant cables are included in the standard shipment package of ROUTER 1-PORT FRACTIONAL T1
SIC.
2.5.6 Connecting Interface Cable
Caution:
z
You should connect a cable to the port with the correct mark. Misplugging is prone to impair the
SIC/MIM and even damage the router.
z
When using T1 cable outdoors, you are recommended to install a special lightning arrester on the
input end of the cable so as to avoid lightning more effectively.
