How many 64kps channels are used for ISDN BRI?

IDSN BRI, also known as a Two-B-plus-D provides:


2 x 64KBps B channels

1 x 16 KBps D Channel.


IDSN PRI (Primary Rate Interface) in North America provides:


23 x 64 Kbps B Channels

1 x 64 Kbps D Channel


IDSN PRI in Europe provides:


30 x 64 Kbps B Channels

1 x 64 Kbps D Channel