Adjusting Termination Of S/T Interface (100 Ohm) - OpenVox B100E on DAHDI User Manual

2.3 Adjusting Termination of S/T Interface (100 ohm)

You are able to set a port to NT or TE mode, please refer to figure 3 for
visualized information.
 If a port works on NT mode, you should set jumper to CONNECT
(ON).
 If a port works on TE mode, theoretically it should be set to OPEN
(OFF), but it might connect to some non-standard ISDN terminal
equipments that do not have terminal resistors, for such equipments,
you should set it to CONNECT(ON).
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B100E on DAHDI User Manual
Figure 3 Jumper setting
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