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5
NI / 5E Custom Terminal Installation
NT1 Settings
Termination
Timing
Single Unit
Installations
Distance between
the NT1 and the
terminal is up to
230 ft.
Fujitsu ISDN phones have a Terminating Resistor
(TR) switch on the back of the set. The options are
ON and OFF.
Note: The default setting for the Fujitsu TR switch
is the OFF position.
Fujitsu TR’s are equivalent to 100 Ohms in the ON
position. Refer to the following sections for TR
setting recommendations.
Many NT1’s have settings available to turn
Termination ON or OFF. If the setting is ON they
may also have settings to select either 50 or 100
Ohms.
Sometimes these settings are accomplished via
switches, other times they are done with jumpers.
Follow the NT1 manufacturer instructions to set the
Termination to ON or OFF as needed.
NT1’s may also have a timing setting with the
options FIXED or ADAPTIVE.
On some NT1’s the options may be labeled PB or
PTP. PB is equivalent to FIXED and PTP is equivalent
to ADAPTIVE. Timing settings in the following
discussions are based on NT1 manufacturer
recommendations. Use these settings if your NT1
has a timing option.
The TR switch on the Terminal Equipment should
be OFF. The TR switches on the NT1 should be set
at On at 50 Ohms. NT1 timing should be set to
ADAPTIVE (or PTP).
NT1 (TR = 50 Ohms)
Terminal Equipment (TR = OFF)
Fujitsu Terminal
Equipment
Terminating
Resistors (TR)