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V.34 Modem Adapter Module
Supplement
2-2
303127-D Rev 00
In the example above, the first ISDN BRI module (in Module slot 3) has the
resources to bring up a second B channel (thus using 2 circuits). The serial adapter
in Module slot 4 uses a third circuit. The second ISDN BRI adapter module (in
Module slot 5), can have only 1 B channel configured because the serial adapter
module (in Module slot 4) has priority and is allocated a circuit over anything in
Module slot 5. In this case, there are not enough circuits left to utilize the second
B channel on the ISDN BRI adapter in Module slot 5. In this example, if you
wanted to have both B channels on both ISDN BRI adapters configured, you
would have to remove the serial card from Module slot 4.
Table 2-1 lists examples of valid WAN adapter module combinations.