CHAPTER 1:
INTRODUCTION
1-4
SEH USER’S GUIDE
1.5
STACKABLE CAPABILITIES
The SEH is a non-intelligent hub designed to be managed by a Cabletron
Systems intelligent hub such as the SEHI or the MicroMMAC. Intelligent
hubs serve as the logical “top” of the stack. They manage all SEH hubs in
the stack, providing full packet and error statistics for the entire stack,
individual device, or individual port. Stack up to five SEH hubs for a
non-managed stack or one intelligent hub and up to four SEH hubs for a
managed stack. Hubs can be added or removed from the stack without
powering down the entire stack.
1.6
OPTIONAL FEATURES
The following features are not included with the SEH, but can be
purchased separately from Cabletron Systems.
Ethernet Port Interface Modules (EPIMs)
EPIMs enable the expansion of a network through a variety of media.
Cabletron offers the EPIMs shown in Table 1-1.
Table 1-1. EPIMs
EPIM
Media Type
Connector
EPIM-A
10BASE-5 AUI
DB15 (Female)
EPIM-C
10BASE-2 Thin Coaxial
BNC
EPIM-T
10BASE-T Unshielded Twisted Pair
RJ45
EPIM-X
Standard Transceiver
DB15 (Male)
EPIM-F1
Multimode Fiber
SMA
EPIM-F2
Multimode Fiber
ST
EPIM-F3
Single Mode Fiber
ST
SEH Book Page 4 Tuesday, March 19, 1996 4:12 PM
