Cabletron Systems SEHI-22 User Manual

Also see for SEHI-22: User guide Addendum

Contents

SEHI USER’S GUIDE2-1CHAPTER 2INSTALLATIONREQUIREMENTS/SPECIFICATIONSThis Chapter describes cabling requirements, network guidelines, andoperating specifications for the SEHI. The network must meet therequirements and conditions specified in this chapter to obtain satisfactoryperformance from this equipment. Failure to follow these guidelinescould result in poor network performance.2.1 CABLE SPECIFICATIONSThe SEHI-22 and SEHI-24 network ports support Shielded Twisted Pair(STP) or Unshielded Twisted Pair (UTP) cabling.Ethernet Port Interface Modules (EPIMs) expand a network using UTP,STP, Multimode Fiber Optic, Single Mode Fiber Optic, or Thin Coaxialcabling. For information concerning EPIMs, refer to Appendix A. Therear panel Interconnect Bus port supports Cabletron Systems HubSTACKInterconnect cables for stackable applications.Take care in planning and preparing the network cabling and connections.The quality of the connections and the length of cables are critical factorsin determining the reliability of the network. The following sectionsdescribe specifications for each media type.2.1.1 HubSTACK Interconnect Cable RequirementsAttach the SEHI to modules in the stack with the SEHI HubSTACKInterconnect cable available only from Cabletron Systems. Refer toChapter 1 for cable part numbers. The cable attaches to the SEHI rearpanel bus port.The rear panel of the SEHI has an Interconnect Bus Out port (maleconnector) to stack SEH non-intelligent hubs together. Stack up to fourSEH hubs together with one SEHI.