Related Manuals for Cabletron Systems TRMIM-20R
Summary of Contents for Cabletron Systems TRMIM-20R
- Page 1 TRMIM-20R UTP TOKEN RING CONCENTRATOR MEDIA INTERFACE MODULE INSTALLATION GUIDE The Complete Networking Solution CABLETRON SYSTEMS, P. O. Box 5005, Rochester, NH 03867-5005...
- Page 2 P.O. Box 5005, Rochester, NH 03867-5005 All Rights Reserved Printed in the United States of America Order Number: 9030275-01 March 1991 TRMIM-20R, TRMIM-10R, TRRMIM-16, TRMIM-12, Remote LANVIEW/Windows, SPECTRUM, and MMAC are trademarks of Cabletron Systems, Inc. LANVIEW is a registered trademark of Cabletron Systems, Inc.
- Page 3 FCC NOTICE FCC NOTICE This device complies with Part 15 of 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. WARNING: This equipment uses and generates and can radiate radio frequency energy and if not installed properly and used in accordance with the instruction manual, may cause interference to...
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Page 4: Table Of Contents
2.2.4 LANVIEW LEDs ...2-8 2.2.5 General Specifications ...2-9 CHAPTER 3 INSTALLING THE TRMIM-20R 3.1 Unpacking The TRMIM-20R ...3-1 3.2 Installing The TRMIM-20R Into The MMAC ...3-2 3.3 Cabling The TRMIM-20R ...3-4 3.3.1 Lobe Cabling ...3-4 3.3.2 Trunk Cabling ...3-6 3.4 Finishing The Installation ...3-8... - Page 5 CONTENTS CONTENTS (CONT.) CHAPTER 4 TESTING AND TROUBLESHOOTING 4.1 Installation Checkout ...4-1 4.2 Using LANVIEW ...4-2 APPENDIX A BASIC TOKEN RING NETWORKS A.1 Basic Token Ring Operation...A-1 A.2 Design Considerations ...A-7 APPENDIX B APPLICATIONS B.1 Adding To An Existing Token Ring Network ...B-1 B.2 Separate Token Ring Networks In One MMAC ...B-2 B.3 Token Ring Networks Bridged Together ...B-3 B.4 MMAC With Ethernet And Token Ring Simultaneously ...B-4...
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Page 6: Chapter 1 Introduction
Cabletron Systems’ TRMIM-20R. The TRMIM-20R is a token ring network concentrator used in conjunction with Cabletron System’s Multi Media Access Center (MMAC). The TRMIM-20R provides ten trunk coupling unit ports and passive Ring-In and Ring-Out ports. -
Page 7: The Trmim-20R
The TRMIM-20R, shown in Figure 1-1, is a Media Interface Module (MIM) that can be installed into a Cabletron Systems’ MMAC-8FNB, MMAC-8, MMAC-5FNB, MMAC-3FNB or MMAC-3. The TRMIM-20R functions as a ten port concentrator in a token ring network providing passive Ring-In and Ring-Out ports and ten trunk coupling ports. - Page 8 The TRMIM-20R supports voice grade UTP at lobe lengths of up to 100 meters at 4 Mbit/sec and up to 60 meters at 16 Mbit/sec. Supported cable types and lengths are listed in Chapter 2, Installation Requirements/Specifications. TRMIM-20R Figure 1-1. TRMIM-20R Token Ring Concentrator...
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Page 9: Related Manuals
The TRMIM-20R incorporates LANVIEW, a useful tool to help you quickly diagnose physical layer network problems. Several LEDs (light emitting diodes) are located at the front of the TRMIM-20R. These LEDs indicate the ring speed, detection of a TRMIM-20R hardware error, and when a specific port is attached to the ring. -
Page 10: Recommended Reading
LAN Troubleshooting Handbook, Mark Miller (1989, M&T Publishing, Inc.) 1.5 GETTING HELP If you need additional support related to the Cabletron Systems’ TRMIM-20R, or if you have any questions, comments or suggestions related to this manual, please contact Cabletron Systems Technical Support at: Cabletron Systems P. -
Page 11: Chapter 2 Installation Requirements/ Specifications
The following sections describe the network requirements for TRMIM-20R operation, however, the same requirements apply whenever UTP cabling is used within a passive ring segment. 2.1.1 Cable Types Trunk Cabling - The TRMIM-20R supports IBM Type 1, 2, 6 and 9 shielded twisted pair cable. Page 2-1... -
Page 12: Cable Lengths
Lobe Length - This is the physical length of UTP cable connecting a station to the trunk coupling unit (TCU) port on the TRMIM-20R. The recommended maximum length for the longest UTP lobe cable is shown in Table 2-2. This is a recommended maximum because... - Page 13 Similar to Type 1, but uses 26 AWG solid wire. NOTES: 1. Refer to Appendix C for cable conversion factors. 2. Table 2-1 lists all cable types for reference. The TRMIM-20R supports Type 3 for TCU port cabling and Types 1, 2, 6, and 9 as trunk cabling.
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Page 14: Impedance
2.1.4 Attenuation Attenuation values include the attenuation of the cables, connectors, and patch panels. Maximum attenuation for UTP cable segments used with the TRMIM-20R is: UTP (Voice Grade) STP (IBM Types 1 & 2) STP (IBM Types 6 & 9) 2.1.5 Maximum Number of Stations... -
Page 15: Noise
2.2.1 Ring Speed The TRMIM-20R can be operated at a ring speed of either 4 Mbit/s or 16 Mbit/s. Selection of the ring speed is accomplished either by a hardware jumper on the TRMIM-20R or by software selection. The software selection overrides the jumper selection. -
Page 16: Connector Types
Example: TRMIM-22 in slot 1 with ports 2, 5, 8, & 12 in use. TRMIM-20R in slot 2 with ports 1, 2, 3, 5, and 6 in use. TRMIM-12 in slot 3 with ports 1, 5, 7, 11, & 12 in use. - Page 17 STP Trunk Connections - Two Female DB-9 connectors for attaching STP trunk cables are located on the lower left side of the TRMIM-20R front panel. Figure 2-2 shows the signal and pin assignments for the STP ring interface. Trunk Port: Ring-In 1 RX–...
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Page 18: Lanview Leds
PRIMARY RING Figure 2-3. Trunk Wrap Plug 2.2.4 LANVIEW LEDs There are a number LANVIEW LEDs on the front panel of the TRMIM-20R. The exact locations and functions for these LEDs are illustrated in Figure 2-4. TRMIM-20R 16Mb Figure 2-4. TRMIM-20R LANVIEW LEDs... -
Page 19: General Specifications
2.2.5 General Specifications SAFETY WARNING: It is the responsibility of the person who sells the system to which the TRMIM-20R will be a part to ensure that the total system meets allowed limits of conducted and radiated emissions. This equipment is designed in accordance with UL478, UL910, NEC 725-2(b), CSA, IEC, TUV, VDE Class A, and meets FCC part 15, Class A limits. - Page 20 REQUIREMENTS/SPECIFICATIONS PHYSICAL Dimensions 13.4D x 11.5H x 2.0W inches (34.0D x 29.2H x 5.1W centimeters) (includes front panel) Weight 2 lbs. 2 oz. (963.9 grams) Page 2-10...
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Page 21: Chapter 3 Installing The Trmim-20R
CHAPTER 3 INSTALLING THE TRMIM-20R This chapter contains instructions for installing the TRMIM-20R into a Cabletron Systems’ MMAC. Instructions for connecting a Twisted Pair Segment to the MIM for operation are also included. Check that all requirements listed in Chapter 2, Installation Requirements/ Specifications, are met before installing the MIM. -
Page 22: Installing The Trmim-20R Into The Mmac
INSTALLING THE TRMIM-20R 3.2 INSTALLING THE TRMIM-20R INTO THE MMAC The TRMIM-20R is designed to be easily installed into an MMAC product When you install the TRMIM-20R, the following guidelines must be followed: • The TRMIM-20R cannot be installed into Slot 0. Slot 0 is reserved for an IRM (Intelligent Repeater Module). - Page 23 Secure the module to the MMAC by tightening the knurled knobs. Failure to firmly secure the MIM may result in improper operation. Power the MMAC chassis on. Figure 3-2. Installing the TRMIM-20R INSTALLING THE TRMIM-20R Front Panel Two DB-9 Receptacles...
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Page 24: Cabling The Trmim-20R
The TCU and token ring station connectors are wired such that the transmit pair from the TRMIM-20R connects to the receive pair of the station and the receive pair from the TRMIM-20R connects to the transmit pair of the station. - Page 25 To attach a UTP lobe cable to the TRMIM-20R: Connect the male RJ-45 connector from one end of the UTP lobe cable to a port on the TRMIM-20R (see Figure 3-4). If a patch panel is to be used, connect the other end of the cable to the appropriate patch panel jack.
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Page 26: Trunk Cabling
Ring-Out ports (see Figure 3-4), consist of two pairs of wire: a transmit signal pair (TX+, TX-) and a receive signal pair (RX+, RX-). The transmit pair at the TRMIM-20R Ring-Out port interfaces with the primary ring path and at the Ring-In port interfaces with the backup ring path. -
Page 27: Finishing The Installation
The STP trunk cables are attached to the TRMIM-20R using male DB-9 connectors. If a patch panel is to be used, connect Ring-In from the patch panel to Ring-In of the TRMIM-20R and Ring-Out from the patch panel to Ring-Out on the TRMIM-20R. When connections are made between concentrators within the same closet, daisy-chain the connections, Ring-In to Ring-Out, from concentrator to concentrator. - Page 28 16 Mbit/s ring speed is selected. 3. Configure the networking software. The TRMIM-20R is now ready for operation. Before placing the network into service, test the installation thoroughly, making sure that all stations are able to be addressed and that the data is being relayed without error.
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Page 29: Chapter 4 Testing And Troubleshooting
CHAPTER 4 TESTING AND TROUBLESHOOTING This section contains procedures to verify the cabling connecting the TRMIM-20R to the Token Ring network and any attached stations. A description of LANVIEW and its function in troubleshooting physical layer network problems is also provided. -
Page 30: Using Lanview
4. Verify that the maximum number of stations and maximum cable lengths for EACH station are not exceeded. When these checks have been successfully completed for each connection to the TRMIM-20R, the MIM is ready for normal operation. If further problems occur, contact Cabletron Systems Technical Support. - Page 31 J1 (refer to Chapter 3, Installing the TRMIM-20R, for setting this jumper). The TRMIM-20R is set to the default ring speed at power on. The ring speed can be changed via local network management software.
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Page 32: Basic Token Ring Operation
BASIC TOKEN RING NETWORKS APPENDIX A BASIC TOKEN RING NETWORKS This Appendix covers the basic operation and concepts related to design considerations for token ring networks. A.1 BASIC TOKEN RING OPERATION A token ring network is made up of a number of stations electrically connected to form a continuous loop. - Page 33 BASIC TOKEN RING NETWORKS Basic Token Ring Protocol This summary briefly covers a basic subset of the overall token ring access protocol. The IEEE Standard 802.5 provides greater detail on token ring access methods and should be referenced whenever more complete information is needed.
- Page 34 The frame addressed for yyy circulates around the ring. All stations in the ring examine the frame, checking the address, in successive order. When the transmission gets to yyy, station yyy copies the data as it goes past. When the original transmission finishes the trip around the ring and is seen by station xxx again, station xxx removes the transmission from the ring.
- Page 35 BASIC TOKEN RING NETWORKS Early Token Release Early Token Release (ETR) is a second protocol option presented in the IEEE 802.5 Standard. ETR is an optional protocol that may be used with 16 Mbit/sec 802.5 token ring networks. It has the advantage of increasing the efficiency of the ring by allowing transmissions from more than one station to occupy the ring at the same time.
- Page 36 case of Cabletron Systems’ Token Ring Repeater (TRRMIM-16), convert from one media type to another (eg. shielded twisted pair to fiber optic). Converters (not illustrated) provide the means for changing from one media type to another. Usually, the conversion allows a particular ring segment to cover a greater distance.
- Page 37 BASIC TOKEN RING NETWORKS Reliability Since token ring networks depend on ring topology for proper operation, the entire network is vulnerable to the frailties of each ring segment. Arranging the ring as a star, using concentrators, and providing trunk coupling units for the station connections reduce the risk of a single failing node bringing the entire network down.
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Page 38: Design Considerations
A.2 DESIGN CONSIDERATIONS A major design consideration is ring length. The ring propagation must be long enough to accommodate an entire token (24 bit times) and still be short enough for the transmitting devices to reliably send information to the next station. The AM inserts an artificial delay that prevents the ring from appearing too short. - Page 39 BASIC TOKEN RING NETWORKS ARL is calculated by combining the lengths of all the trunk cables, subtracting the length of the shortest trunk cable (typically an 8-foot patch cable within a wiring closet) and then doubling the result (Lobe cabling is not part of the ARL calculation). The impact of ARL on drive distance is apparent when we examine the resulting calculation for drive distance.
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Page 40: Appendix B Applications
APPENDIX B APPLICATIONS This Appendix presents the following network applications as examples of how the TRMIM-20R may be used in a token ring network. These are examples to help clarify features and applications for the TRMIM-20R and actual applications are NOT limited to those shown here. -
Page 41: Separate Token Ring Networks In One Mmac
MMAC-8FNB, one TRMIM-20R, one TRMIM-22, five TRMIM-12s and one IRM. Slot 0 IRM Slot 1 TRMIM-20R for ring network #1 at 4 Mbit/sec Slot 2 TRMIM-22 for ring network #1 at 4 Mbit/sec Slot 3 first TRMIM-12 for ring network #2 at 4 Mbit/sec... -
Page 42: Token Ring Networks Bridged Together
B.3 TOKEN RING NETWORKS BRIDGED TOGETHER Figure B-3 illustrates the bridging of two token ring networks together using a token ring to token ring network bridge. Bridging ring networks is necessary when: the networks are of different ring speeds (one at 4 Mbit/sec and the other at 16 Mbit/sec), or when there is a need for networks to be connected and one or both of the rings is at maximum capacity. -
Page 43: Mmac With Ethernet And Token Ring Simultaneously
APPLICATIONS B.4 MMAC WITH ETHERNET AND TOKEN RING SIMULTANEOUSLY Figure B-4 illustrates the simultaneous installation of an Ethernet network with a token ring network in the same MMAC. To connect the two networks together requires a token ring to Ethernet bridge. Without this bridge, information cannot pass between the two networks. -
Page 44: Appendix C Calculating Ring Length
APPENDIX C CALCULATING RING LENGTH This Appendix presents methods for calculating cable lengths for passive token ring networks or passive network segments giving consideration to adjusted ring length (ARL). These calculations differ between networks that are wholly contained within a single wiring closet and networks spanning multiple wiring closets. -
Page 45: Single Wiring Closet Networks
CALCULATING RING LENGTH • Wherever Type 6 or Type 9 cable is used, the length must be converted to the equivalent Type 1 cable length as follows: (Length of Type 6 or 9 cable) x 3/2 = Equivalent Type 1 or 2 length C.2 SINGLE WIRING CLOSET NETWORKS In a single wiring closet application, all of the trunk cabling is contained inside the closet, and the cable length of interest is the... - Page 46 6. Determine your Actual Longest Lobe length, combine: TCU port to patch panel Wiring closet to wall plate + Wall plate to station Longest Lobe Length 7. Compare the Maximum UTP Lobe Length, calculated in step 5, with your networks longest lobe, from Step 6. If your Actual Longest Lobe exceeds the Maximum UTP Lobe Length (negative result in step 7), you must adjust your lobe length or add active components (repeaters) to extend the available trunk...
- Page 47 CALCULATING RING LENGTH 150' STATION 1 WALL PLATE WIRING CLOSET Figure 6-1. Wiring in a Single Wiring Closet Formulas Two formulas were used to create the tables for the UTP Cable Length Worksheets. The first defines the cabling for a single wiring closet with only one rack and the second for multiple racks within the wiring closet.
- Page 48 Concentrator to Concentrator Patch Cables = 12' x number of Concentrators (see note) NOTE: Wrap plugs must be installed if no external trunk cabling is connected at the TRMIM-20R ring ports. Multiple Rack Internal Trunk Length = (Rack to Rack Patch Cables +...
- Page 49 CALCULATING RING LENGTH UTP CABLE LENGTH WORKSHEET Single Wiring Closet 1. Maximum Drive Limit (1263 feet for 4 Mbit/s or 569 feet for 16 Mbit/s) 2. Internal Trunk Length (Value from Table below) 3. Type 1 Cable Budget (1) – (2) = (3) 4.
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Page 50: Multiple Wiring Closet Networks
C.3 MULTIPLE WIRING CLOSET NETWORKS In multiple wiring closet applications, both external trunk cable length and lobe cable length must be considered in the overall drive distance for a passive ring. Use the UTP Cable Length Worksheet, Multiple Wiring Closet form toward the end of this section to determine the cable lengths that can be used in multiple wiring closet token ring applications. - Page 51 CALCULATING RING LENGTH 5. Add the Equivalent Type 1 Lobe Length (step 3) to the Combined Trunk Length (step 4) to find the Internal Drive Distance, and enter the sum here and on line 4a. Internal Drive Distance = Combined Trunk Length + Actual Longest Lobe 6.
- Page 52 Use Figure C-2 to follow the calculations using the UTP Cable Length Worksheet for Multiple Wiring Closets in the following example of a 4 Mbit/sec ring. Example: Multiple Wiring Closet 1. Actual Longest Lobe (given as 85 feet) 2. UTP to Type 1 STP Conversion 3.
- Page 53 CALCULATING RING LENGTH WC-1 2 Racks 4 Concentrators Token Ring Corporation 93 feet Figure C-2. Building Cable Budget Formulas The formulas used to create the table for the UTP Cable Length Worksheet for Multiple Wiring Closets yield values equal to the length of internal cabling within wiring closets (see Figure C-3) in a multiple closet configuration.
- Page 54 Internal Trunk Length = 2 x (TCU Patch Cables) + (Rack to Rack Patch Cables) + (Concentrator to Concentrator Patch Cables) where: TCU Patch Cables = 12' Rack to Rack Patch Cables = 45' x (number of Racks - 1) Concentrator to Concentrator Patch Cables = 12' x (number of Concentrators - number of Racks) To Next...
- Page 55 CALCULATING RING LENGTH UTP CABLE LENGTH WORKSHEET Multiple Wiring Closets 1. Actual Longest UTP Lobe 2. UTP to Type 1 STP Conversion (2.54 for 4 Mbit/s or 2.91 for 16 Mbit/s) 3. Equivalent Type 1 Lobe Length (1) x (2) = (3) 4.
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Page 56: Calculating Mixed Cable Types
C.4 CALCULATING MIXED CABLE TYPES When calculating cable lengths for installations using mixed cable types, you must compensate for different cable attenuations. Usually cable lengths are most useful when converted to a Type 1 equivalent length. Use the following formulas to convert to Type 1/2 from Type 6/9 and Type 1/2 from UTP at 4 Mbit/s or UTP at 16 Mbit/s: Multiply the length of:...