B400P/BE400P on DAHDI User Manual
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2.3 Setting Card ID
If want to install more than one card of B400P/BE400P in a PC, you
should take care of the card id switch. The state of ON stands for "1"in
binary, OFF represents "0", and Card ID is calculated by binary. For
instance, the four switches should be all set to OFF if there is only one
card, which means their corresponding binary value is "0000" and the
decimal number is "0". There two pieces of rules you must obey to set
Card ID:
The ID of the first card must be set to 0, the second should be set to 1,
and so on.
The first Card is a card that will be initialized (i.e. installing driver)
firstly once the system boot up. At most cases, Linux will initialize
PCI devices according to their slot order. The slot nearest to the CPU
will be initialized firstly and the farthest end slot will be initialized at
last. That is to say, the card which is nearest to the CPU ID should be
set to 0 if there are more than one B400P/BE400P on your machine.
2.4 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).
