Cabletron Systems CSX1200 User Manual

Also see for CyberSWITCH CSX1000: User guide Quick start

Contents

USER’S GUIDE46 CyberSWITCHWAN A CCESSSince the CyberSWITCH is a factory-customized product, there is no need to install specific adapterboards in order to access the WAN. Connections for the internal BRI interface are made at the sys-tem’s back panel. On the B2, a basic rate line will connect to the RJ-45 connector labeled 1. On theB4, up to two basic rate lines will connect to the ports labeled 1 and 2. On the B8, up to four basicrate lines will connect to the ports labeled 1 through 4.For informational purposes, the pin list for the BRI connector follows:Pin and Signal Assignment for the RJ-45 ConnectorNote: The 10Base-T connector and the WAN connector are both RJ45 connectors. However, theydo have different electrical interfaces. Take care to keep these separate.Basic Rate InterfaceAccessing services such as NTT's INS-64, BOC's Centrex Basic Rate ISDN, or PBX's basic rate linesis possible using the system’s BRI interface.Each BRI port on the system provides two 64 Kbps channels for data and a 16Kbps signalingchannel (2B+D). Both B channel connections can be active at the same time, to the same or differentdestinations.The internal BRI interface provides up to four 4-wire S/T interfaces with separate RJ-45 connectors.It uses external NT1s (when necessary) to connect to the public ISDN. External ISDN terminaladapters are not needed.In Japan, NTT provides a dedicated service called High Speed Digital-I that uses the same BRIinterface. This can be either a 64Kb or 128Kbps leased circuit. The BRI interface supports from oneto four HSD-I circuits, depending on the model.Pin Signal Function1 NC No Connect2 NC No Connect3 TX + to Network Transmit to Line (T)4 RX + from Network Receive from Line (T)5 RX - from Network Receive from Line (R)6 TX - to Network Transmit to Line (R)7 NC No Connect8 NC No Connect