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INTRODUCTION
Page 1-2
1.2 GETTING HELP
If you need additional support related to the Cabletron Systems SEHI,
or if you have any questions, comments, or suggestions concerning this
manual, contact Cabletron Systems Technical Support:
By phone .................. (603) 332-9400
Monday-Friday; 8am - 8pm EST
By CompuServe
®
..... GO CTRON from any ! prompt
By Internet mail...... support@ctron.com
By FTP..................... ctron.com (134.141.197.25)
Login:
anonymous
, Password:
your email address
1.3 SEHI OVERVIEW
The 10BASE-T SEHI is an intelligent repeating hub that provides
front panel ports for network connections and a rear panel
HubSTACK Interconnect Bus port for stackable connections. The
SEHI is designed to manage Cabletron Systems’ SEH series of
non-intelligent stackable hubs.
Figure 1-1. The SEHI-24 and SEHI-34
SEH INTERCONNECT
OUT
SEHI-24
10BASE-T HUB
WITH
LANVIEW®
EPIM-1
EPIM-2
PWR
CPU
CLN
E
1
E
2
RCV
LNK
RCV
LNK
HubSTACK
10BASE-T HUB
WITH
LANVIEW®
SEHI-24
24X 23X 22X 21X 20X 19X
18X 17X 16X 15X 14X 13X
12X 11X 10X 9X 8X 7X
6X 5X 4X 3X 2X 1X
COM
RESET
24 23 22 21 20 19 18 17 16 15 14 13
12 11 10 9 8 7 6 5 4 3 2 1
SEH INTERCONNECT
OUT
SEHI-34
10BASE-T HUB
WITH
LANVIEW®
EPIM-1
EPIM-2
PWR
CPU
CLN
E
1
E
2
RCV
LNK
RCV
LNK
HubSTACK
10BASE-T HUB
WITH
LANVIEW®
SEHI-34
COM
RESET
24 23 22 21 20 19 18 17 16 15 14 13
12 11 10 9 8 7 6 5 4 3 2 1
12X 1X
24X 13X