1-1CHAPTER 1INTRODUCTIONThe MicroMMAC-T, shown in Figure 1-1, is an IEEE 802.5-based,IBM-compatible, SNMP-compliant, intelligent, stackable Multi-MediaAccess Center (MMAC). The MicroMMAC-T is a versatile wiring hubinto which you can install a variety of products designed to provide arange of functions to meet your particular network requirements. Itsupports connection to up to four Cabletron Systems non-intelligent,active STH hubs, allowing you to constitute one or more Token Ringnetworks from a stack configuration.Figure 1-1 The MicroMMAC-T1.1 MicroMMAC-T MODELSAll MicroMMAC-Ts are functionally and physically identical except forthe 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 category3, 4, and 5 UTP cabling• MicroMMAC-24T – 24 active RJ45 lobe ports that support category3, 4, and 5 UTP cabling• MicroMMAC-42T – 12 active, shielded RJ45 lobe ports that supportIBM Type 1, 2, 6, and 9 STP cabling• MicroMMAC-44T – 24 active, shielded RJ45 lobe ports that supportIBM Type 1, 2, 6, and 9 STP cablingRDISPLAY RESET4M 16MSPEEDCPU16Mb/sACTMGMTRO24 23 2221 20 1918 17 1615 14 1312 11 109 8 76 5 43 2 1MicroMMAC-24T TOKEN RING HUB WITH LANVIEWSUPPORTING 100 OHM UTP CABLECOM 1COM 2RI2 4 2 3 2 2 2 1 2 0 1 9 1 8 1 7 1 6 1 5 1 4 1 312 11 10 9 8 7 6 5 4 3 2 1CABLETRONMicroMMAC-24TCONSOLE PORT 2PORT 1RSTXMTRCVXMTRCVMicroSNAC-TFLT ACT V35 NMIConsolidated SNA/SDLC, BSC,Media-FlexibleRing PortManagement Accessand UPS Monitoring RO ConvertibleLobe Ports(CRBRIM-W/T) Router/WAN InterfaceLAN, WAN Connectivity (MicroSNAC)ConnectionLANVIEW LED SystemMonitoring and DiagnosticsMoMessage LCDSystem-Event