3Com Router Module Guide
Chapter 3 Multifunctional Interface Modules
3-43
3.9.4 Interface LEDs
Router 4-Port ISDN-S/T MIM panel is shown in the following figure:
Figure 3-48
Router 4-Port ISDN-S/T MIM panel
Description of the LEDs on Router 4-Port ISDN-S/T MIM panel is shown in the
following table:
Table 3-25
Description of the LEDs on Router 4-Port ISDN-S/T MIM panel
LED
Description
Yellow lamp on the left
OFF means channel B1 is idle. ON means channel B1 is occupied and
data communication is going on.
Green lamp on the right
OFF means channel B2 is idle. ON means channel B2 is occupied and
data communication is going on.
3.9.5 Interface Cable
Interface cables of Router 4-Port ISDN-S/T MIM are standard ISDN S/T interface
cables. Pins 3 and 6 are for transmitting data, and pins 4 and 5 are for receiving data.
At both ends of the cables are RJ-45 connectors.
GreenYellow
Red Black
Yellow
Green
Black
Red
GreenYellow
Red Black
Yellow
Green
Black
Red
Figure 3-49
ISDN S/T cable
3.9.6 Connecting the Interface Cable
Caution:
Read the mark identifying a port before you connect a cable to it, making sure it is the correct port.
Wrong connection tends to damage MIMs and even the Router.