Labels:text | screenshot | display | rectangle | font | number OCR: PRIMARY RATE ISDN (EUROPEAN STANDARD) Signaling/Packet on D Channel 64Kbps Call Control function Voice/Data on B Channel . 1 to 30 Channels 64Kbps Switching Data/Voice on B Channel Function 64Kbps FIGURE 2: Primary access consists of 30 B channels plus one 64Kbps D channel in Europe and 23 B channels plus one 64Kbps D channel in the United States.
