Cabletron Systems CyberSWITCH CSX150 User Manual

Also see for CyberSWITCH CSX150: User guide Quick start guide

Contents

USER’S GUIDE32 CyberSWITCHS YSTEM COMPONENTSThe major components of the CyberSWITCH are:• System hardware consisting of a platform and an administration port provided by theplatform.• Four main categories of system software:The boot device gains control at power-up. It runs diagnostics, downloads new versions ofoperational software, and prepares the host processor for execution of operational software.The flash file system stores a compressed image of operational software and I/O systemsoftware. It also stores other necessary files for configuration and information storage.The operational software provides system functionality, such as download and initialization ofthe I/O subsystem. The I/O subsystem handles LAN I/O.• Remote ISDN devices which interoperate with the system and allow device access to networkresources.More detailed descriptions of system software and hardware are included in the next two chapters.The following section describes remote ISDN devices.R EMOTE ISDN D EVICESThe CyberSWITCH provides a centralized concentrator function for remote ISDN devices. Thedevices can be separated into the following categories:• remote ISDN bridge devices• PC based terminal adapters• ISDN enabled workstations• other ISDN routersTypical remote ISDN bridges provide one Ethernet port and one basic rate ISDN port. The basicrate port is connected to the switched digital network and is used to make connections to theCyberSWITCH. The Ethernet port is used to connect to a remote LAN. The remote bridge devicesends Ethernet frames from devices on the remote LAN over the switched network.PC-based terminal adapters connect to a remote personal computer and use the switched digitalnetwork to connect to the system. The terminal adapter sends network protocol specific framesfrom the host PC device over the switched network.Workstation-based terminal adapters connect to a workstation and use the switched digitalnetwork to connect to the system. The terminal adapter sends network protocol specific framesfrom the workstation over the switched network.