3Com MSR 30, MSR 20, MSR 50 manual LEDs on SIC-1BS/SIC-2BS and SIC-1BU/SIC-2BU panels, Led

SIC-1BS/SIC-2BS&SIC-1BU/SIC-2BU 57

The following table describes the LEDs on SIC-1BS/SIC-2BS and SIC-1BU/SIC-2BU panels.

Table 30 LEDs on SIC-1BS/SIC-2BS and SIC-1BU/SIC-2BU panels.

LED	Description
B1	OFF indicates the B1 channel is idle.
	Blinking indicates the B1 channel is being
	used for data communication.
B2	OFF indicates the B2 channel is idle.
	Blinking indicates the B1 channel is being
	used for data communication.
ACT	OFF indicates the inactive state. Steady ON
	indicates the active state.
ON	OFF indicates interface card is powered off.
	ON indicates the interface card is powered
	on.

Interface Cable Both SIC-1BS/SIC-2BS and SIC-1BU/SIC-2BU use the telephone cable with ferrite core.

c CAUTION: The corresponding cables of SIC-1BS/SIC-2BS and SIC-1BU/SIC-2BU are included in their standard shipment packages.

Connecting the Interface Cable

c

CAUTION:

■When connecting the interface cable, pay attention to the mark on the interface to avoid wrong insertion, which may damage the interface card or even the router host.

■If outdoor cabling is involved, you need to install a lightning arrester at the input end of the SIC-BU/SIC-BS interface cable to avoid lightning strike.

After the interface card is properly installed, follow these steps to connect the cable.

Step 1: Verify the type of the ISDN line provided by your telecommunications service provider.

Step 2: Connect the cable.

■For SIC-1BS/SIC-2BS

If the line is an ISDN U-interface line, use an NT1 for conversion. Insert one end of the telephone cable with ferrite core into the BRI S/T interface of SIC-1BS/SIC-2BS, and the other end to NT1.

If the line is an ISDN S/T interface line, insert one end of the telephone cable with ferrite core to the BRI S/T interface of SIC-1BS/SIC-2BS, and connects the other end with the ISDN S/T interface line.