Cabletron Systems MICROMMAC-22T, User Manual

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1-1
CHAPTER 1
INTRODUCTION
The MicroMMAC-T, shown in Figure 1-1 , is an IEEE 802.5-based,
IBM-compatible, SNMP-compliant, intelligent, stackable Multi-Media
Access Center (MMAC). The MicroMMAC-T is a versatile wiring hub
into which you can install a variety of products designed to provide a
range of functions to meet your particular network requirements. It
supports connection to up to four Cabletron Systems non-intelligent,
active STH hubs, allowing you to constitute one or more Token Ring
networks from a stack configuration.
Figure 1-1 The MicroMMAC-T
1.1 MicroMMAC-T MODELS
All MicroMMAC-Ts are functionally and physically identical except for
the number and type of their lobe, or Trunk Connection Unit (TCU),
ports. MicroMMAC-T models are listed as follows:
• MicroMMAC - 22T – 12 active RJ45 lobe ports that support category
3, 4, and 5 UTP cabling
• MicroMMAC - 24T – 24 active RJ45 lobe ports that support category
3, 4, and 5 UTP cabling
• MicroMMAC-42T – 12 active, shielded RJ45 lobe ports that support
IBM Type 1, 2, 6, and 9 STP cabling
• MicroMMAC-44T – 24 active, shielded RJ45 lobe ports that support
IBM Type 1, 2, 6, and 9 STP cabling
R
DISPLAY
RESET
4M
16M
SPEED
CPU
16Mb/s
ACT
MGMT
RO
24
23 22
21
20 19
18 17
16
15 14
13
12
11
10
9
8
7
6 5
4
3 2
1
MicroMMAC-24T
TOKEN RING HUB
WITH LANVIEW
SUPPORTING 100 OHM UTP
CABLE
COM 1
COM 2
RI
2 4 2 3 2 2
2 1 2 0 1 9
1 8 1 7 1 6
1 5 1 4 1 3
12
11
10
9
8
7
6
5
4
3
2
1
CABLETRON
MicroMMAC-24T
CONSOLE
PORT 2
PORT 1
RST
XMT
RCV
XMT
RCV
MicroSNAC-T
FLT ACT V35 NMI
Consolidated SNA/SDLC, BSC,
Media-Flexible
Ring Port
Management Access
and UPS Monitoring
RO Convertible
Lobe Ports
(CRBRIM-W/T) Router/WAN Interface
LAN, WAN Connectivity (MicroSNAC)
Connection
LANVIEW LED System
Monitoring and Diagnostics
Mo
Message LCD
System-Event