Install The Bri Terminating Resistor - Avaya DEFINITY ONE Installation And Upgrades

Installation and Upgrades for DEFINITY ONE and
IP600 Internet Protocol Release 10 555-233-109
1 Install and Cable the Cabinet

Install the BRI terminating resistor

Install the BRI terminating resistor
The resistors balance the cable plant between the receiver and the transmitter on
the interface. When using the TN2198 ISDN-BRI 2-Wire U Interface circuit pack,
use an NT1.
A terminating resistor is always required near the terminal when the BRI S-type
interface circuit pack (TN556 BRI 4-Wire S-NT Line circuit pack) is used (see
#5ESS Switch Integrated Services Digital Network Customer Premises Planning
Guide , 533-700-100).The resistor is built into the NT1 and can be 1 of 3 values,
depending on the configuration and the distance from the NT1 to the ISDN
terminal. The NT1 controls the resistor value; if needed, place a terminating
resistor adapter near the terminal and in the satellite closet or work location.
!
DANGER:
The 440A4 terminating resistor and 110RA1-12 terminating resistor block
are Underwriter Laboratories (UL) listed. Most new installations are the
110RA1-12 terminating resistor block. Observe the following installation
instructions:
Never install telephone wiring during a lightning storm.
Never install telephone jacks in wet locations unless the jack is
specifically designed for wet locations.
Never touch uninsulated wires or terminals unless the telephone line
has been disconnected at the network interface.
Use caution when installing or modifying telephone lines.
Issue 6
December 2001
1-113