User`s guide

SEHI USER’S GUIDE 2-1
CHAPTER 2
INSTALLATION
REQUIREMENTS/SPECIFICATIONS
This Chapter describes cabling requirements, network guidelines, and
operating specifications for the SEHI. The network must meet the
requirements and conditions specified in this chapter to obtain satisfactory
performance from this equipment. Failure to follow these guidelines
could result in poor network performance.
2.1 CABLE SPECIFICATIONS
The 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 Coaxial
cabling. For information concerning EPIMs, refer to Appendix A. The
rear panel Interconnect Bus port supports Cabletron Systems HubSTACK
Interconnect 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 factors
in determining the reliability of the network. The following sections
describe specifications for each media type.
2.1.1 HubSTACK Interconnect Cable Requirements
Attach the SEHI to modules in the stack with the SEHI HubSTACK
Interconnect cable available only from Cabletron Systems. Refer to
Chapter 1 for cable part numbers. The cable attaches to the SEHI rear
panel bus port.
The rear panel of the SEHI has an Interconnect Bus Out port (male
connector) to stack SEH non-intelligent hubs together. Stack up to four
SEH hubs together with one SEHI.