3Com 3C10200 NBX Installation Guide - Page 43

NBX Cards and Devices 43 BRI-ST Digital Line Card The ISDN BRI-ST (Basic Rate Interface) Digital Line Card (Figure 14) has four separate ports, each of which accommodates two B channels and one D channel. Each B channel carries user data at 64 Kbps and the D channel operates at 16 Kbps. If the two B channels are bonded, the transmission rate is 128 Kbps. The 3C10164C-ST must reside on the same subnet as the NCP. The 3C10164D can be initialized and communicate with the NCP via IP (layer-3) or Ethernet (layer-2). If the NCP and the 3C10164D card are located on the same Ethernet segment, then layer-2 is used for the control path. If the NCP and the 3C10164D card are located on different IP subnets, then layer-3 is used. The 3C10164D can receive it IP information through a DHCP server. The server must be configured for DHCP option 184 operation to provide the NCP IP address to the card. For more details about configuring a remote card, see the NBX Administrator's Guide. Figure 14 BRI-ST Digital Line Card (3C10164C-ST) D 1 B1 2 B2 3C10164C 3Com NBX Quad BRI-S/T Card D B1 3 B2 D B1 4 B2 D CONSOLE B1 B2 Figure 15 BRI-ST Digital Line Card (3C10164D) CAUTION: The BRI-ST Digital Line Cards are not approved for use in the United States or Canada. CAUTION: This equipment does not operate when the main power fails. Each 3C10164C-ST card has the following lights and connectors: ■ BRI Port Status Lights - Each BRI port has these status lights: ■ D - On when this signaling channel is active. ■ B1 - On when this data channel is active (a call is in progress). ■ B2 - On when this data channel is active (a call is in progress). During the Auto Discover process: