Chapter 2: Card Installation
Terminating the NT Mode Line
There are DIP switches for each port used to add a 100 ohm termination
when the B410P is in NT mode. This switch should only be turned on in
those instances where a BRI is daisy-chained and terminated on the
B410P in NT mode. See Figure 4 for a detailed illustration of this setting.
This switch must not be turned on in TE mode. The default setting is Off.
Caution.
Only qualified service personnel should continue with
hardware installation and configuration of the B410P card.
Users should not attempt to perform these functions themselves.
/.
.4-ODE
WITHOHM
TERMINATION
/.
/&&
.4-ODEWITHOUT
OHMTERMINATION
/.
/&&
/.
4%-ODEWITHOUT
OHMTERMINATION
This diagram illustrates the DIP switches that control resistance.
In TE mode, the switches are to remain off. In NT mode, the
switches may be turned on when 100ohm resistance is required.
Figure 4: NT Termination Switches
Digium, Inc.
Page 19