For S0 subscriber equipment, ISDN exchange trunk connections (BRI) or S0 tie-trunk connections to HiPath systems (using CorNet N or CorNet NQ) or to foreign switches (using QSIG).
Note: For EMC reasons, a "front face plate" is also required. The card provides 8 ports for a total of 16 B-channels per card. Up to 6 cards can be installed in one OSBiz X8 or HiPath 3800 system box, but no more than 8 cards are supported in the same OSBiz X8 or HiPath 3800 system.