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INTRODUCTION
1-5
re-time all data. Cabletron offers a variety of TPIMs for RI/RO trunk
connections as shown in Table 1-1.
Ring Speed Switch
Use the Ring Speed Switch to select either 4 or 16 Mbps ring speed.
Flash EEPROM
The firmware image on the MicroMMAC-T can be upgraded by Flash
EEPROM downloads via Cabletron System’s Remote
LANVIEW/Windows version 2.3 or later, or via any server supporting
BOOTP or TFTP protocols.
LANVIEW LEDs
Cabletron Systems’ LANVIEW LEDs, located on the face of the
MicroMMAC-T, provide an effective monitoring and troubleshooting tool
to help diagnose power failures, RI/RO status, cable faults, ring speed, link
problems, and network activity. See Section 5.1 for information about
using LEDs.
Cabletron’s Distributed LAN Monitor Mode
To manage a network that includes multiple subnets, remote network
management stations need to query multiple management devices,
increasing the data traffic on the network. Network managers can reduce
the amount of management related traffic by setting the MicroMMAC-T
into Distributed LAN Monitor mode via a remote management package.
The MicroMMAC-T in DLM mode will collect management data from the
Table 1-1. TPIMs
TPIM Media Type Connector
TPIM-T1 Shielded Twisted Pair DB9
TPIM-T2 Unshielded Twisted Pair RJ45
TPIM-T4 Shielded Twisted Pair RJ45
TPIM-F2 Multimode Fiber Optic ST
TPIM-F3 Single mode Fiber Optic ST