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- User Manual
Cabletron Systems 24 User Manual
Summary of 24
Page 1
Cabletron systems, p. O. Box 5005, rochester, nh 03866-5005 sth-22/-24/-42/-44 stackable token ring hub user’s guide.
Page 2: Notice
Notice iii 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 so...
Page 3: Fcc Notice
Notice iv 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: Cabletron Systems, Inc.
Notice v cabletron systems, inc. Program license agreement important: before utilizing this product, carefully read this license agreement. This document is an agreement between you, the end user, and cabletron systems, inc. (“cabletron”) that sets forth your rights and obligations with respect to t...
Page 5: Exclusion of Warranty
Notice vi exclusion of warranty and disclaimer of liability 1. Exclusion of warranty. Except as may be specifically provided by cabletron in writing, cabletron makes no warranty, expressed or implied, concerning the program (including its documentation and media). Cabletron disclaims all warranties,...
Page 6: United States Government
Notice vii united states government restricted rights the enclosed product (a) was developed solely at private expense; (b) contains “restricted computer software” submitted with restricted rights in accordance with section 52227-19 (a) through (d) of the commercial computer software - restricted ri...
Page 7: Contents
Contents ix contents chapter 1 introduction 1.1 using this manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.2 sth overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.2.1 lanview leds . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 1.2.2 tcu p...
Page 8: Chapter 3
Contents x chapter 3 installation 3.1 unpacking the sth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3.2 installing the sth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3.2.1 rack mount or wall mount hardware. . . . . . . 3-1 3.2.2 adding the sth to a stack . . . ...
Page 9: Chapter 1
Page 1-1 chapter 1 introduction welcome to the cabletron systems sth-22/-24/-42/-44 stackable token ring hub user’s guide . The sth (stackable token ring hub) is a non- intelligent hub designed to provide expanded connectivity for cabletron systems’ sthi intelligent hubs and cabletron systems microm...
Page 10
Sth overview page 1-2 connector ports (tcus) for connections to stations and other network devices. Figure 1-1. Front and back views of the sth-24 up to four sth hubs can be linked to the same intelligent hub, bringing the total direct connectivity potential to 120 managed tcu ports in the stack. In...
Page 11
Lanview leds page 1-3 1.2.1 lanview leds cabletron systems’ lanview status monitoring and diagnostics system is a troubleshooting tool. Conveniently located on the front panel, lanview leds help the user to quickly identify power failures, beaconing conditions, cable faults, and link problems. Refer...
Page 12
Automatic beacon recovery process page 1-4 wrong ring speed. If a ring speed mismatch is detected, the sth disables the port to keep the misconfigured station isolated from the ring and provides a simple visible led signal (blinking red at the port’s led) to indicate to the user that speed fault pro...
Page 13: 1.3
Related manuals page 1-5 by default, each of the sth hub’s tcu ports is configured to its stn (station) setting to support concentrator lobe connections to stations. Through local management, any tcu port may be reconfigured to its ro (ring out) setting to support connections to passive mau (multi- ...
Page 14
Related manuals page 1-6 figure 1-2. Improved beacon recovery resolution for maus (8 stations) (8 stations) (8 stations) (8 stations) sth tcus ring out ring out ring out ring out multi-station access units ring in ring in ring in ring in when each mau is individually connected to the sth hub, only o...
Page 15: 1.4
Getting help page 1-7 1.4 getting help if you need additional support related to the cabletron systems sth, or if you have any questions, comments, or suggestions concerning this manual, contact cabletron systems technical support: by phone: (603) 332-9400 monday-friday; 8am - 8pm est by compuserve ...
Page 16: Chapter 2
Page 2-1 chapter 2 requirements & specifications this chapter describes network guidelines, power requirements, and operating specifications for the sth. Before installing the sth, read this chapter and confirm that the network meets the requirements and conditions specified in this chapter. Failure...
Page 17
General considerations page 2-2 to re-route cabling away from potential noise sources, or to ensure that the electrical wiring in the area is properly wired and grounded, or to replace connectors along affected segments. Temperature the attenuation of pvc-insulated cable varies significantly with te...
Page 18: 2.2
Cable specifications page 2-3 • where practical, dedicated cable should be used for token ring signals. • work area wall plates and outlets used for the token ring network should be clearly labeled as token ring network lobe connections. 2.2 cable specifications take care in planning and preparing t...
Page 19
Utp cable categories page 2-4 category 3 consists of (usually) four unshielded twisted pairs of 24 awg solid wire for data or voice communication. (ibm type 3 is coincidentally the same as utp category 3.) it is typically used to wire cable runs within the walls of buildings. In some installations, ...
Page 20: 2.4
Utp lobe lengths page 2-5 utp cabling to any non-token ring network conductors (telephone, etc.) or ground. If in doubt, test wiring before using. 2.3.2 utp lobe lengths the physical length of the cable connecting a station to a tcu port on the concentrator is referred to as the lobe length. The max...
Page 21
Stp cable categories page 2-6 2.4.1 stp cable categories the supported stp cable types meet the following specifications: ibm type 1 consists of two shielded twisted pairs (stp) of 22 awg solid wire for data. Used for the longest cable runs within the walls of buildings. Ibm type 2 consists of six p...
Page 22: 2.5
Tcu specifications page 2-7 2-4. Cable routing, connector attenuation, noise and crosstalk can adversely affect the maximum lobe length. Mixed stp cable types if cable types are to be mixed in the lan, compensations must be made for the different cable attenuations. For example, type 6 & 9 cables ca...
Page 23: 2.6
Operating specifications page 2-8 on sth models -42/-44, each rj45 connector is encased in a metallic shield which provides a means of connection for the stp cable shield. Shield continuity is maintained by contacts within the female rj45 that contact the metallic casing of the male rj45 on the stp ...
Page 24
Ring sequence page 2-9 note: when cancelling a mib override, the user may have to perform the switch and power-cycle procedure twice (as described in the steps below) to actually change the sth hub’s ring speed by the switch. To return to switch control from an mib overridden ring speed setting: 1. ...
Page 25
Environmental requirements page 2-10 under all conditions of line at full load. The minimum and maximum load current from each output is shown below. 2.6.4 environmental requirements operating temperature: +5 ° to +50 ° c non-operating temperature: -30 ° to +90 ° c operating humidity: 5 to 95% (non-...
Page 26: Chapter 3
Page 3-1 chapter 3 installation this chapter outlines the procedure for installing the sth and adding it to a stack. Confirm that the network meets the guidelines and requirements outlined in chapter 2, installation requirements/ specifications , before installing the sth. 3.1 unpacking the sth unpa...
Page 27
Adding the sth to a stack page 3-2 3.2.2 adding the sth to a stack sth hubs are star-wired to the intelligent hub. To add sth hubs to a stack, refer to figure 3-1 and perform the following steps: 1. Attach an sth hubstack interconnect cable to the "stack" port on the rear panel of an sth. 2. Attach ...
Page 28
Attaching the strain relief bracket page 3-3 3.2.3 attaching the strain relief bracket attach the strain relief bracket to the front of the sth as follows: 1. Locate the strain relief bracket and four 8-32 x 3/8" screws from the sth-accy-kit package. Warning: use of longer screws may cause damage to...
Page 29
Wall-mounting the sth page 3-4 figure 3-3. Installing the rack-mount brackets figure 3-4. Installing the sth in a rack 3.2.5 wall-mounting the sth when an sth is installed on a wall, its cable connections must face down to prevent the sideways stresses of hanging cables from compromising the connect...
Page 30
Wall-mounting the sth page 3-5 figure 3-5. Installing the wall mounting brackets 2. Select the wall location for the sth within 7 feet of a power outlet. Warning: there is a shock hazard whe drilling into walls containing electrical wiring. Select a wall location where drill bits and screw anchors w...
Page 31
Free-standing installation page 3-6 figure 3-6. Wall-mounting the sth 3.2.6 free-standing installation for a free-standing shelf or tabletop installation, install the sth on an unrestricted free surface area 21 inches wide, 18 inches deep and 6 inches high, within 7 feet of its power source, as show...
Page 32
Connecting the sth to the power source page 3-7 3.2.7 connecting the sth to the power source note: the sth has a universal power supply which will accept power sources from 90 vac to 264 vac, 47-63 hz. To connect the sth to the power source: 1. Plug the power cord into the back panel of the sth. 2. ...
Page 33
Finishing the installation page 3-8 c. Check that the twisted pair connection meets db loss and cable specifications outlined chapter 2. If a link still has not been established, contact cabletron systems technical support. 3.3 finishing the installation the sth is now ready for operation. Before pl...
Page 34: Chapter 4
Page 4-1 chapter 4 troubleshooting this chapter contains instructions for using lanview leds to troubleshoot physical layer network problems. 4.1 lanview led signals the sth incorporates the cabletron systems lanview status monitoring and diagnostics system. Lanview leds can help diagnose problems s...
Page 35
Trouble resolution page 4-2 loss of power if the sth is having power problems, check the power delivery system (power cable, power outlet, circuit breaker, fuse). Loss of contact with intelligent hub if the stack led is indicating disconnection from the intelligent hub, it may be that the intelligen...