Page 2 - Notice
i Notice Notice Cabletron Systems reserves the right to make changes in specifications and other information contained in this document without prior notice. The reader should in all cases consult Cabletron Systems to determine whether any such changes have been made. The hardware, firmware, or soft...
Page 3 - FCC Notice
ii Notice FCC Notice This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. NOT...
Page 4 - DOC Notice
iii Notice DOC Notice This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications. Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant l...
Page 5 - Contents
v Contents Chapter 1 Introduction Features........................................................................................................................... 1-1Related Manuals ............................................................................................................ 1-4Get...
Page 6 - Chapter 1; Introduction; Features
1-1 Chapter 1 Introduction The 9T122-24 MicroLAN™ Switch Module, shown in Figure 1-1, is a three port Token Ring bridge and router module. This module supports either one token ring with twenty four HUB connections, or two separate Token Rings with twelve HUB connections, and an interface to the FNB...
Page 9 - Related Manuals
Introduction 1-4 Related Manuals The manuals listed below should be used to supplement the procedures and technical data contained in this manual. MMAC-Plus Installation Guide MMAC-Plus Operations Guide MMAC-Plus 9C300-1 Environmental Module User ’s Guide MMAC-Plus 9C214-1 AC Power Supply User ’s Gu...
Page 10 - Chapter 2; Installation; Installing the MicroLAN Module
2-1 Chapter 2 Installation Installing the MicroLAN Module The MMAC-Plus MicroLAN Module may be installed into any of the 14 slots that are available. To install, follow the steps below: 1. Switch off the power supplies and remove all power from the MMAC-Plus chassis. 2. Remove the blank panels, cove...
Page 12 - The Reset Switch
2-3 The Reset Switch The Reset Switch The Reset switch is located on the front panel, under the top plastic tab as shown in Figure 2-2. It serves two functions: • Pressing the reset switch twice within three seconds causes the processor (i960) to reset. • Pressing and holding the switch on for three...
Page 13 - User Accessible Components
Installation 2-4 User Accessible Components Figure 2-3 shows the various components that are accessible to the user. These consist of an eight position dip switch (explained in the next section), replaceable PROMs and sockets for RAM. These will be used for future upgrades. Figure 2-3. User Accessib...
Page 14 - Setting the Module Card DIP Switch
2-5 Setting the Module Card DIP Switch Setting the Module Card DIP Switch An eight switch DIP switch is located on the module card as shown in position 8 in Figure 2-3 and in Figure 2-4. The function of the switches are listed in Table 2-1. Figure 2-4. Location of Module DIP Switch 1 2 3 4 5 6 7 8
Page 16 - Ring Speed
2-7 Ring Speed Ring Speed The module defaults to a 16Mbps ring speed on all rings. This may be changed though local management. Multi-Ring Out Capability Any port of the module may be configured as a ring-out port through management software. In this configuration a stand-alone passive concentrator ...
Page 17 - Chapter 3; Operation; Bridging
3-1 Chapter 3 Operation The 9T122-24 MicroLAN Module provides connectivity between the front panel Token Ring(s) and the FDDI rings on the backplane (FNB-1 or FNB-2). MMAC-Plus modules connect to either the Internal Network Bus (INB) or the Flexible Network Bus (FNB) bus. The 9T122-24 module connect...
Page 18 - Transparent Bridging; Source Route Bridging
Operation 3-2 Transparent Bridging Transparent Bridging is accomplished by building a Source Address Table (SAT) from source MAC/physical addresses and using the SAT to make forwarding decisions. The 9T122-24 prevents unnecessary network traffic from passing through the module by implementing two se...
Page 19 - Spanning Tree Algorithm
3-3 Bridging 2. The receiving bridges append their own route information to the Route Information Field (RIF) in the MAC frame header and transmit the frame again. 3. Eventually, the original source device receives all of the ARE replies from the other end stations on the network. 4. From this infor...
Page 20 - System Management Buses
Operation 3-4 Flexible Network Bus (FNB) The FNB consists of two dual FDDI networks, the FNB-1 and FNB-2, providing up to 400 Mbps of data bandwidth. These FDDI networks are 100% ANSI FDDI-compliant supporting SMT (version 7.3), MAC, PHY, and PMD standards. This allows the FNB to traverse multiple M...
Page 21 - System Diagnostic Controller
3-5 System Diagnostic Controller System Diagnostic Controller This diagnostic controller is composed of a Z-80 microprocessor and it’s supporting logic. The diagnostic controller is designed to control the power-up sequencing of modules, monitor the 9T122-24 input and output power parameters, keep w...
Page 22 - Chapter 4; LANVIEW LEDs
4-1 Chapter 4 LANVIEW LEDs The front panel LANVIEW LEDs, shown in Figure 4-1, indicate the status of the module and may be used as an aid in troubleshooting. Figure 4-1. LANVIEW LEDs 9T122-24 TOKEN RING 1 2 3 4 5 FNB SMB CPU 16 Mb 1 2 System Status FNB Transmit Token Ring Mac Transmit Token Ring Mac...
Page 26 - Chapter 5; Specifications; Safety; Service
5-1 Chapter 5 Specifications Safety This equipment meets the safety requirements of: • UL 1950 • CSA C22.2 No. 950 • EN 60950 • IEC 950 • EMI Requirements of FCC Part 15 Class A • EN 55022 Class A • VCCI Class I • EMC requirements of: EN 50082-1IEC 801-2 ESDIEC 801-3 Radiated susceptibilityIEC 801-4...
Page 27 - Physical
Specifications 5-2 Physical Dimensions: 35.0 D x 44.0 H x 3.0 W centimeters(13.8 D x 17.4 H x 1.2 W inches) Weight: Unit: 1.36 kg. (3lb) Shipping: 1.81 kg. (4lb) Electrical CPU: i960 Shared DRAM Memory: 4Mb (expandable to 12 Mb) Local DRAM Memory: 4Mb (expandable to 12 Mb) Flash: 2Mb (expandable to ...
