Allied Telesis CentreCOM AT-3675 Bridge User Manual Download Page 1 | Manualshive

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Allied
Telesyn

CentreCOM



AT-3675 Bridge

SNMP Manageable

User Manual

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Summary of Contents for CentreCOM AT-3675 Bridge

Page 1: ...Allied Telesyn CentreCOM AT 3675 Bridge SNMP Manageable User Manual...

Page 2: ...its arising out of or related to this manual or the information contained herein even if Allied Telesyn International Corp has been advised of known or should have known the possibility of such damage...

Page 3: ...3 Chapter 2 Installation 5 Site Selection 5 Factory Configuration 5 Changing Configuration with Transceivers 6 Switching Configuration with Jumpers 6 Upgrading Bridge Firmware 8 Chapter 3 Operation 9...

Page 4: ...to Point Cabling 20 10BASE FL FOIRL Ethernet 23 10BASE2 Thin Ethernet 23 10BASE5 Thick Ethernet 23 AUI Drop Cables 24 Appendix B Glossary 25 Appendix C Technical Support Fax Order 31 Incident Summary...

Page 5: ...ases the network performance at each segment by diminishing network traffic The reliability of a large network can be enhanced by a bridge and allows sub networks of different media types to be interc...

Page 6: ...indicators and their functions are described in Table 1 Table 1 AT 3675 Front Panel Indicators The two 10BASE2 network connectors are standard Bayonet Nut Couples BNCs The two 10BASE5 network connecto...

Page 7: ...for 10BASE2 and thicknet for 10BASE5 or pre 802 3 Ethernet media options on each network segment Fiber optic 10BASE FL FOIRL or UTP with the addition of an optional transceiver s Supports 2 048 MAC a...

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Page 9: ...ty installation requirements starting on page i The AT 3675 bridge should be placed in a cool well ventilated area Air vents are located on each side of the bridge It is very important that none of th...

Page 10: ...not the other port is active To change the jumper block If you need to switch port connections for Channel A and or Channel B find the locations of the jumper blocks as shown in Figure 2 Look up the...

Page 11: ...nstall the jumper block s Check for bent pins or misalignment between the jumper block and socket 7 Reinstall the top cover and screws Table 4 Jumper Block Options for Media Selection Figure 2 Locatio...

Page 12: ...and loosen the top cover by removing the three screws along each side and the three screws along the back 4 Remove the top cover by sliding it towards the back If the cover fits tightly use a screwdr...

Page 13: ...s a comprehensive set of diagnostics when the power is first applied The red diagnostic LED stays ON and the port s Receive and Transmit indicators flash as the tests are executed The Diagnostic indic...

Page 14: ...by a series of bridges An example of this configuration is given in Figure 4 A cascaded bridged network is useful when the number of bridges is small If many bridges are used the delay associated with...

Page 15: ...bridge since inexpensive conversion devices are available However if you need to install a bridge and need to interconnect different media the AT 3675 can apply in this case Figure 6 shows a network...

Page 16: ...e considered in terms of natural clusters or workgroups At one level there may be separate divisions and within a division there are usually teams of people associated with a project or department Whe...

Page 17: ...r networks it is useful to perform a thorough analysis of the network traffic patterns With the aid of a network monitor you can determine the amount of traffic between nodes throughout the network Wo...

Page 18: ...sistance of network analysis application programs In these cases you may wish to consult network installers who can provide a network analysis service to help you decide where to place bridges Fault T...

Page 19: ...inherently more fault tolerant providing service to many users even when network components fail This has the advantage of making it much easier to isolate the cause of the network fault Since only a...

Page 20: ......

Page 21: ...tification problem is exaggerated by the fact that some suppliers have sold data quality cables manufactured with voice quality cabling If any voice quality cabling is used in a 10BASE T network syste...

Page 22: ...1 Cable Level Cable Description AC Character Specification Twist Foot 10BASE T OK 1 Unshielded Untwisted N A CCITT None NO 2 Individual UTP 100 W 30 W RS232 1BASE5 AT T PDS None NO 3 Typical Individua...

Page 23: ...oss over and straight through instances the wire is twisted pair Figure 16 demonstrates usable and unusable cable wire pairings for the straight through configuration Figure 14 Pin 1 Orientation on an...

Page 24: ...ble shown in Figure 17 pins 1 and 2 TD and TD are paired as are pins 3 and 6 RD and RD When pins 1 and 2 are crossed over they connect to pins 3 and 6 respectively and pins 3 and 6 when crossed over c...

Page 25: ...ter 1 64 ft The 10BASE2 cable length can not exceed 185 meters 607 ft per 10BASE2 cable segment The worst case propagation delay for a 185 meters 607 ft thin Ethernet segment is 950 9 ns The propagati...

Page 26: ...nts may be made only to the cable ends at the 15 pin D shell connector AUI cables may have a maximum 257 ns propagation delay as used for computing the worst case propagation delay of a cable system A...

Page 27: ...ELCO RJ21 This connector is very common in 10BASE T wiring As opposed to the RJ45 connector the 50 pin Telco connector concentrates up to 12 UTP connections onto one connection This concentration of U...

Page 28: ...as the trunk medium in the baseband system COAXIAL CABLE SEGMENT A length of coaxial cable sections and coaxial connectors and terminated at each end in its characteristic impedance COLLISION An unwan...

Page 29: ...d up concentrator replacing a failed module HUB to HUB WIRING See Hub to MAU Wiring HUB to MAU WIRING UTP cables for 10BASE T hub to MAU or Network Interface Controller NIC cards are wired straight th...

Page 30: ...ent repeater in a department concentrator chassis that makes management data available to the Master MANAGEMENT AGENT Software that is used to view hub activity and set hub variables MASTER A repeater...

Page 31: ...Usually measured in nanoseconds IEEE 802 3 has specific propagation delay maximums for computing propagation budgets when designing a LAN Cable length plays a major role in propagation delay i e a 50...

Page 32: ...OLS A set of protocols for inter computer communication including network level Internet Protocol transport level Transmission Control Protocol or TCP and application level protocols for example Telne...

Page 33: ...__________ ____________________________________ ____________________________________ Conditions List the steps that led up to the problem ___________________________ __________________________________...

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Page 35: ...__ Data Cabling Techniques _______ Reading the LEDs ______ Cabling _______ Software Downloading ______ I found the following the most valuable ______________________________ __________________________...

Page 36: ......

Page 37: ...ake City UT Tel 801 350 9130 Fax 801 350 9051 Vienna VA Tel 703 506 0196 Fax 703 506 1986 Chicago IL Tel 708 406 8431 Fax 708 406 8462 Austin TX Tel 512 502 3087 Fax 512 794 9326 Dallas TX Tel 214 446...

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