Cabletron Systems CSX200 CyberSWITCH Installation Manual

Also see for CSX200 CyberSWITCH: Setup guide User guide Configuration guide User guide

Contents

CSX200 Firmware SupportCSX200 Installation Guide2-9The CSX200 supports one ISDN BRI line and either or both of the B channels for transferringdata. If the two B channels are used for separate connections, each provides up to 64 Kbps transferrate. Both channels can be used together to provide uncompressed data transfer at up to 128 Kbps.The CSX200 can also transfer compressed data at up to 512 Kbps (after decompression).A network terminator device (NT-1) provides the interface between ISDN terminal (router)equipment and the ISDN service provider. The CSX200 supports the WPIM-S/T by providing anS/T interface that requires an external NT-1.The following telephone switch types are supported within the U.S.:• NET3 (European ISDN)• NET3SW (European Swiss Variant)• NTT (Nippon Telephone and Telegraph)• KDD (Kokusai Denshin Denwa Co. Ltd.)• French Delta (VN4) switchesHDSLHigh data rate Digital Subscriber Line (HDSL) technology uses existing copper twisted pair cablesdesigned for conventional analog voice transmission from a telephone carrier servicing area aslow-cost alternative to fiber optic cables. HDSL provides high-speed full-duplex digitaltransmission links of up to 1.544 Mbps.HDSL is a direct connection technology that allows connections to be made for distances of up to12,000 feet over 24 American Wire Gauge (AWG) unconditioned twisted pair wire. To obtain theFull T1 line Rate of 1.544 Mbps, two wire pairs are necessary (four wires). If one pair of wires isused, the data rate is772 Kbps, equivalent to one-half of a T1 line.Bridging and RoutingBridging — Bridging connects two or more separate networks together. The bridge examines aportion of each network frame called the header. This header contains control information for theframe. The bridge compares the destination address of the frame to a table of source addresses(bridges dynamically learn the physical location of devices by logging the source addresses ofeach frame and the bridge port the frame was received on in the source address table).