Eicon Networks C2x Family Multiple ISDN Devices, Installing a Terminating Resistor, Termination

Multiple ISDN Devices

If the NT1 is connected to more than one ISDN device, follow the procedures below.

75 meters or more

If the connection spans 75 meters (250 feet) or more, both end devices on the ISDN bus must be set to 100 ohm termination. If the Eiconcard is one of the end devices, connect the 100 ohm terminating resistor included with the ISDN cable. Consult the manuals provided with the other ISDN devices and NT1 for more details.

Note Some NT1s do not support connections over 75 meters (250 feet). Check your user documentation to determine the distance supported

75 meters or less

If the connection spans less than 75 meters (250 feet), set the NT1 to 50 ohms of resistance, and do not connect the terminating resistor. Set the other ISDN devices to no termination. Consult the manuals provided with the NT1 and other ISDN devices for more detailed instructions.

Installing a Terminating Resistor

If termination is required and your Eiconcard C21 does not have the built in termination switch, you should have been supplied with a 100 ohm terminating resistor. The terminating resistor is installed by inserting the RJ-45 end of the ISDN cable into the terminating resistor, and then inserting the terminating resistor into the wall jack.

12 Termination