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Functional Description
RADring
Installation & Operation Manual
2-46 Power Consumption 3/11/98 12:33
EPR-4T/FL
The EPR-4T/FL module has four 10BaseT ports and one/two 10BaseFL ports.
It can only be connected to a RADring hub without an Ethernet bus. The
module functions in stand alone mode as an Independent Multiport
Repeater.
The EPR-4T/AUI can be connected to an additional RADring Ethernet
module in an Inter Repeater Link (IRL). Such a connection requires one
crossover cable.
The module performs an automatic partitioning and reconnection when a
port violates transmission protocols. LAN operation is not interrupted while
the module checks the affected port. Jabber lockup protection is used to
ensure that the LAN operation is not affected by the transmission of
excessively long packets. It also corrects reversed packet waveform polarity.
The EPR-4T/FL occupies two slots and has four screened RJ-45 connectors
and two/four ST connector. The UTP ports are connected by UTP and/or
screened UTP cables and the 10BaseFL ports are connected via 62.5/125µm
multimode fiber. Up to 10 modules can be installed in a single hub.
Extension
Modules
EP-1T/2W
The EP-1T/2W is a repeater with one 10BaseT and two WAN links. It can
only be connected to a RADring hub with an Ethernet bus. It is either
connected to the hub’s Ethernet bus as part of an Ethernet segment, or it
works as an independent repeater in stand alone mode.
The WAN links, which are based on RAD’s Ethernet extender/bridging chip
ChipBridge, support data rates of up to 10Mbps (sync) or up to 115.2 Kbps
(async). Various WAN link interfaces, such as: V.24, V.35, V.36, RS-530,
X.21, are supported.
Filtering and forwarding is performed at the maximum theoretical rate of
15,000 frames per second (wire speed). The buffer can hold 256 frames with
a throughput latency of one frame. Filtering can be disabled for extender or
segment applications, allowing all traffic to flow over the WAN link. The
bridge automatically learns MAC addresses of nodes that are members of the
LAN to which it is connected and forwards only those frames destined for
another LAN. Its LAN table stores up to 10,000 addresses and it is updated
automatically.
The EP-1T/2W occupies one slot, has one RJ-45 connector and one
customized Y cable, which is connected to a 50-pin SCSI connector on the
module. Up to 20 modules can be installed in a single hub allowing
connection of up to 40 WAN links.
- Modular LAN Access HUB 1
- Warranty 3
- Safety Warnings 3
- Regulatory Information 4
- Declaration of Conformity 5
- Contents 6
- List of Figures 10
- List of Tables 11
- Chapter 1 12
- Introduction 12
- RADring Hub 13
- Table 1-1 RADring Modules 14
- Module Function Description 15
- Radring I systems 16
- Centralized 17
- Management 17
- 1.2 System Configuration 19
- Token Ring 20
- Configurations 20
- RADring II 21
- FIBER-OPTIC 22
- 3ULPDU\ 5LQJ 23
- 6DWHOOLWH 5LQJ 23
- 5$'ULQJ 23
- TO 50 USERS 24
- TO 16 USERS 24
- TO 10 USERS 24
- 5$'ULQJ 26
- Configuration 30
- Physical 31
- Common Logic (CML Card) 31
- Mangement Option (CML Card) 31
- Environment 31
- Chapter 2 32
- Functional Description 32
- Stand Alone 35
- Multiple Rings 35
- Multiple Hub 37
- Sattelite 37
- 2.4 General Ethernet 40
- EP-8T EPR-8T EP-8T CML/MN 42
- EP-8T EP-8T 42
- Remote Ethernet Configuration 44
- RADring Token 46
- Ring Modules 46
- RADring Ethernet 47
- TL-4 Four-port 48
- Lobe Access 48
- TL-2/ED - Two 52
- Distance Lobe 52
- Access Modules 52
- TL-2/EDS TL-2/EDSU 53
- TL-2/F Two-port 54
- Fiber-optic Lobe 54
- Access Module 54
- TIO Ring-In/Ring 56
- Out Module 56
- $1' %<3$66 57
- TCR Token-Ring 58
- Copper Repeater 58
- 52 6,'( 60
- 5, 6,'( 60
- TFR Fiber-optic 62
- Repeater Module 62
- TFR-16(RO) 66
- TFC Fiber-optic 67
- Converter 67
- REDUNDANT LINK 68
- BECOMES ACTIVE 68
- TRE Token Ring 70
- Elementary 70
- Bridge Module 70
- CML/NM RADring 72
- CML/IB In-Band 73
- Multiport 74
- Independent 76
- Repeater 76
- Extension 77
- 2.12 Power Consumption 78
- Chapter 3 80
- System Installation 80
- 3.2 Unpacking 81
- 3.3 Site Requirements 81
- Installation 83
- 3.6 Inserting Module Cards 85
- 3.7 Removing Module Cards 85
- Basic Module 86
- High Power 87
- 3.9 Connector Types 88
- 3-10 Cabling 3/11/98 12:29 89
- 3.10 Cabling 90
- Connector 93
- WIRES TO BE CUT 94
- (RED AND BLACK 94
- FROM THE FAN) 94
- Chapter 4 96
- Operation 96
- Lobe Modules 97
- RI/RO Modules 98
- CML/NM Module 99
- Ethernet 99
- Moddules 99
- Diagnostics 100
- TRE Modules 101
- Chapter 5 102
- RADring Modules 102
- Chapter 6 104
- Token Ring Design 104
- Considerations 104
- Design Modules 105
- Design Rules 106
- Table 6-1 IBM Cabling System 107
- Overcoming Lobe 108
- Distance 108
- Restrictions, and 108
- Simplifying 108
- Figure 6-1 Lobe Media Test 110
- 6.4 Simplified Design Rules 112
- TFR Network 113
- Two splices and one connector 117
- 6.6 Configuration Examples 118
- TCR TCR 119
- TFR in satellite mode 120
- ACTIVE LOBES PASSIVE LOBES 122
- Chapter 7 124
- Ethernet Design 124
- Design Methods 126
- New Software Versions 132
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