3Com MSR 50, MSR 30, MSR 20 manual Following figure illustrates the MIM-4BSV panel

MIM-2BSV/MIM-4BSV Module 137

Table 94 Interface attributes of MIM-2BSV/MIM-4BSV

Attribute	MIM-2BSV module MIM-4BSV module
Interface rate	192 Kbps
Cable	ISDN S interface cable
Supported service	Voice access over ISDN S interface cable

Interface LEDs The following figure illustrates the MIM-2BSV panel.

Figure 155 MIM-2BSV panel

The following figure illustrates the MIM-4BSV panel.

Figure 156 MIM-4BSV panel

The following table describes the LEDs on the MIM-2BSV/MIM-4BSV panel.

Table 95 Description of the LEDs on the MIM-2BSV/MIM-4BSV panel

LED	Description
LINK	OFF means no link is present.
	ON means a link is present.
ACT	Slowly blinking means data is being
	transmitted or received on B1 channel.
	Fast blinking means data is being
	transmitted or received on B2 channel.
	Steady ON means data is being transmitted
	or received on both B1 and B2 channels.
	Steady OFF means no data is being
	transmitted or received.

Interface Cable When a BSV interface works in user mode, it uses a straight-through ISDN S/T interface cable for connection. At both ends of the cable are RJ-45 connectors with pins 3 and 6 for data transmission and pins 4 and 5 for data receiving.

Figure 157 Straight-through ISDN S/T cable

Yellow	Green
Green	Yellow
RedBlack	Black
	Red