3Com OfficeConnect Remote 510 User Manual Download

Page: 53 / 96

Troubleshooting

1-39

Troubleshooting

WARNING:

There are no user serviceable components

inside the case of the unit.

CAUTION:

Read the section ‘Important Safety

information’, at the start of this manual.

The OfficeConnect Remote is fully performance

tested after assembly. Providing the unit has been

correctly installed, and is used in accordance with the

instructions contained in this manual, difficulties

should not arise. If unit or system maintenance is

required, then it must be carried out by a

competent network engineer.

In the unlikely event that you experience problems

with the unit, the following procedure will enable

you to undertake basic troubleshooting before

contacting your 3Com reseller.

Malfunction

Remedy

If you cannot

connect your

OfficeConnect

Remote to the

network or PC.

Verify that your computer is equipped with

an available serial port and that the correct

cables and connectors are being used. If in

doubt contact the unit’s supplier.

The POWER LED

does not light.

Confirm that:

The switched outlet socket of the

electrical mains system supply is turned

on. The main lead is correctly plugged

into the unit’s electrical mains system inlet

socket.

The switched outlet socket is ‘live’ by

plugging the unit into an alternate socket

to see if it functions.

Rc.bk : RC01.FRM Page 39 Thursday, July 10, 1997 9:53 AM

Summary of Contents for OfficeConnect Remote 510

Page 1: ... January 1996 OFFICECONNECTTM REMOTE 510 520 530 USER GUIDE Please read the Supplementary Information section of this manual for details of the OfficeConnect 531 model and an EMC Update FRONT FRM Page 1 Thursday July 10 1997 10 07 AM ...

Page 2: ... civilian agencies Restricted Rights Legend Use reproduction or disclosure is subject to restrictions set forth in subparagraph a through d of the Commercial Computer Software Restricted Rights Clause at 48 C F R 52 227 19 and the limitations set forth in 3Com Corporation s standard commercial agreement for the software Unpublished rights reserved under the copyright laws of the United States If t...

Page 3: ...y the labels VOICE and ISDN TNV Ports identified by the labels SERIAL COAX 10BASET and WAN SELV TNV telecoms network voltage is a circuit which under normal operating conditions carries telecommunication signals SELV safety extra low voltage is a secondary circuit which is designed and protected so that under normal and single fault conditions the voltage between any two accessible parts does not ...

Page 4: ...AL COAX 10BASET und WAN SELV TNV Telecoms Network Voltage Spannung des Telekommunikationsnetzwerks ist ein Anschluss der unter normalen Umständen Telekommunikationssignale enthält SELV Safety Extra Low Voltage Extra Sicherheitsspannung ist ein weiterer Anschluss der unter normalen Umständen und Fehlerkonditionen entworfen und gesichert wurde so dass die Spannung zwischen zwei erreichbaren Teilen k...

Page 5: ...s etiquettes SERIAL COAX 10BASET et WAN SELV TNV Telecoms Network Voltage tension réseau de télécommunications est un circuit qui dans des conditions d opérations normales transfert les signeaux télécoms SELV Safety Extra Low Voltage tension de sécurité extra réduite est un circuit secondaire désigné et protègé qui dans des conditions normales et de fautes uniques assure que la tension entre deux ...

Page 6: ...Rc bk RCSAFETY FRM Page vi Thursday July 10 1997 9 53 AM ...

Page 7: ... Stacking Clips 1 11 Wall Mounting the OfficeConnect Remote 1 12 Connecting the Power Adapter 1 12 Connecting to Your 10BaseT LAN 1 13 Connecting to a Single Workstation 1 14 Connecting to Your 10Base2 LAN 1 14 Connecting to ISDN 1 15 Connecting to the WAN 1 16 Connecting to the VOICE Port 1 16 Connecting a Management Terminal 1 16 Location of OfficeConnect Fax and Print Servers 1 16 Quick Configu...

Page 8: ...A 6 Network Organization Structure and Physical Layout A 7 The Internet A 7 Routing IP and IPX A 7 IP Routing A 9 IPX Routing A 11 IP Addresses A 12 Numbered and Unnumbered Links A 15 B TECHNICAL INFORMATION Specifications B 1 LAN Connector Interfaces B 1 WAN Connector Interface B 1 ISDN Connector Interface B 1 Voice Connector Interface B 1 Management Connector Interface B 1 Bridge Characteristics...

Page 9: ...line Technical Services D 1 3Com Bulletin Board Service D 1 World Wide Web Site D 2 Support from Your Network Supplier D 2 Support from 3Com D 2 Returning Products for Repair D 3 INDEX Rc bk RC TOC Page iii Thursday July 10 1997 9 53 AM ...

Page 10: ...Rc bk RC TOC Page iv Thursday July 10 1997 9 53 AM ...

Page 11: ...he unit using the Quick Configuration option you can carry out additional configuration to optimize the unit s performance on your network Refer to the Software Reference guide for more details How to Use This Guide This table shows where to find specific information If you are looking for information on Turn to About the OfficeConnect Remote s features a description of the front panel indicators ...

Page 12: ...nter key Do not press the Return or Enter key when an instruction simply says type Text represented as screen display This typeface is used to represent displays on your screen for example Enter the unit s IP address Text represented as commands This typeface is used to represent commands that you enter for example CO IS NU Keys When specific keys are referred to in the text they are called out by...

Page 13: ... they are installed used and maintained in good working order in accordance with our instructions and recommendations If any of the following conditions occur isolate the electricity supply and refer to your 3Com reseller If the case or cover is not correctly fitted If the case is damaged If the unit begins to make an odd noise smell or smoke If the unit shows signs of a distinct change in perform...

Page 14: ... with other OfficeConnect units Do not place anything else on top of the unit s case Allow a clearance gap of at least a 150 mm from the rear panel of the unit to allow for cable access This product ostensibly complies with the electro magnetic compatibility EMC requirements of EN 55022 Class A and EN 50082 susceptibility However to fully comply with Class B of EN55022 the following prerequisites ...

Page 15: ...example Ethernet hub print sharing and network fax OfficeConnect Remote Features The OfficeConnect Remote is designed to connect a LAN Local Area Network at one location with a number of other LANs at remote locations The LAN could comprise any number of PCs servers or other computing equipment which in an office or small business environment are typically linked together using a centrally located...

Page 16: ...chasing the OfficeConnect Remote model fitted with both ISDN and WAN ports to ensure increased flexibility The range of OfficeConnect Remote units is as follows OfficeConnect Remote 510 Provides connection from 10BaseT or Thin Ethernet 10Base2 LANs to ISDN services for data transfer between remote sites OfficeConnect Remote 520 In addition to the data transfer facilities this model has a Voice por...

Page 17: ...ational and international public switched telephone network which offers a digital end to end telecommunication system providing a better quality service than available using the analog telephone network The principal benefits of ISDN are Fast call setup times typically taking less than one second for national calls Greater bandwidth with multiple channels The basic rate service often referred to ...

Page 18: ...width can be automatically dialled up to supplement the bandwidth of the leased circuit The interconnected bridges would then treat the leased line and ISDN channel as parallel links sharing the load across the two Pack Contents Checklist Before you install your OfficeConnect Remote check the contents of the box against the pack contents checklist below If any of the items have been damaged in tra...

Page 19: ...ugh the OfficeConnect Remote has two LAN connections 10Base2 and 10BaseT only one port can be used at a time A standard ISDN line wall socket to connect the ISDN cable to the ISDN port of the OfficeConnect Remote If a suitably sited wall socket is not already available then contact your telecommunications supplier for assistance A suitable cable to connect to your ISDN socket A 1 5 meter ISDN cabl...

Page 20: ...d no faults detected Slow flash Loading software during power up or new software is being downloaded to the unit Quick flash Self test during power up On Problem detected Refer to Troubleshooting on page 1 38 for more information POWER Green This LED indicator shows three states On Power is connected to the unit Slow flash New software is being downloaded to the unit Rc bk RC01 FRM Page 6 Thursday...

Page 21: ...e is connected to a working ISDN line Sometimes this LED does not light until the first call attempt is made Flashing A fault condition has been identified on the ISDN line Off No ISDN connection present ISDN1 and ISDN 2 Yellow These LED indicators provide confirmation that an ISDN call is in progress on ISDN Channel 1 or Channel 2 You are connected to a remote ISDN unit and are incurring ISDN cal...

Page 22: ...e LED is lit the WAN connection is valid and can pass data across the link If the LED is flashing it indicates a fault on the WAN port ISDN Utilization Green Yellow These LEDs show the ISDN utilization as a percentage of network loading If you consistently see a continuous ISDN loading of 100 and you require faster throughput then you might consider the following You could configure the unit to fi...

Page 23: ...or further advice RESET For Technical Support use only SERIAL The Serial Manager port enables a management PC or terminal to be connected to the OfficeConnect Remote using the 9 pin V 24 Serial Manager cable supplied with the unit The port provides VT100 terminal emulation running at 9600 bps Refer to Appendix B for more information about cables You also need a proprietary communications software ...

Page 24: ... the port is required to support and configure it accordingly Refer to Appendix B for information about the WAN interface cables required Suitable cables are available from your 3Com reseller as spare parts refer to Appendix B for required item part number 10BASET This RJ45 port is to the left of the ISDN socket when looking at the rear of the unit and is used to provide a connection to a 10BaseT ...

Page 25: ...es to a maximum ringer equivalence number REN of two United Kingdom Providing one of the two 64 Kbps ISDN channels is not being used by the unit then a voice call can be made Incoming ISDN traffic carries both a voice and data identifier and depending on the type of transmission a voice call is automatically directed to the appropriate port connected to the telephone handset The VOICE port is term...

Page 26: ...bber Feet and Stacking Clips The four self adhesive rubber feet prevent your hub from sliding around on your desk Stick the feet to the marked areas at each corner of the underside of your hub The four stacking clips are used for neatly and securely stacking your OfficeConnect units together You can stack up to a maximum of four units Large units must be stacked below small units To stack your uni...

Page 27: ... needs When wall mounting your OfficeConnect Remote ensure that it is within reach of the mains socket You need two suitable screws Ensure that the wall you are going to use is smooth flat dry and sturdy Make two screw holes which are 142 mm 5 6 in apart Fix the screws into the wall leaving their heads 3 mm 0 12 in clear of the wall surface Remove any connections to the units and locate it over th...

Page 28: ...mains lead of the power adapter into an adjacent electrical mains system socket and if necessary turn on the power at the outlet socket 3 The OfficeConnect Remote performs a self test and loads the software During the self test and software loading the ALERT and POWER LEDs flash Connecting to Your 10BaseT LAN Figure 1 4 Connect The UTP Cable To OfficeConnect hub You can connect the OfficeConnect R...

Page 29: ...tion box as shown in Figure 1 5 or directly to a 10BaseT hub port Connecting to a Single Workstation To connect the OfficeConnect Remote to a single personal computer or workstation 1 Implement the crossover for the 10BaseT port on the OfficeConnect Remote by setting the MDI MDIX switch to MDIX out 2 Connect the UTP cable not supplied directly into the RJ45 socket marked LAN on the OfficeConnect R...

Page 30: ...unit you may find that a traditional T piece does not provide enough clearance to allow space for fingers and cables when units are stacked together 1 Connect a 10Base2 Y piece to each OfficeConnect unit and every other device to be connected 2 Daisy chain each Y piece with a length of 10Base2 coaxial cable to form a single segment as shown in Figure 1 6 Remember to terminate the two free ends of ...

Page 31: ...ne end to the WAN port on the OfficeConnect Remote unit and the other to the NTU Connecting to the VOICE Port If your OfficeConnect Remote is fitted with a Voice port then a standard telephone handset or other analog telephony equipment such as a a fax or answering machine can be connected to the port marked VOICE if required This port can also be used to connect the OfficeConnect fax server to IS...

Page 32: ... Serial Connect the other end to the serial COM port on your PC workstation When you have connected a management terminal you can configure the Office Connect Remote to communicate with the remote site s See Quick Configuration overleaf Location of OfficeConnect Fax and Print Servers If you are connecting the OfficeConnect Fax Server or Print Server to the OfficeConnect Remote you must configure t...

Page 33: ...terminal emulation to VT100 with communications parameters set as follows select the COM port to be used for data transmission 9600 bits s 8 data bits 1 stop bit no parity with flow control set to none Example Using Windows 3 1 Terminal Application Start the Windows Terminal application Using a mouse click on Settings in the status bar to reveal the menu From the menu a Select the Terminal Emulati...

Page 34: ...ulator has been correctly configured pressing RETURN displays the Enter Password screen 3 Enter the default password PASSWORD using uppercase characters The Main Menu appears as shown in Figure 1 8 Figure 1 9 Quick Configuration Menu 4 At the command prompt enter QC The screen changes to display the Quick Configuration menu shown in Figure 1 9 Rc bk RC01 FRM Page 20 Thursday July 10 1997 9 53 AM ...

Page 35: ...e connection to the remote IP host Use the IN command to configure the connection to your Internet service provider s router You cannot configure the unit to be an IP bridge and IP router at the same time The OfficeConnect Remote talks to other OfficeConnect Remote units using its own very efficient FastConnect protocol over the ISDN or WAN port connections If you need to communicate with another ...

Page 36: ...ss Type the IP address for this unit It must be a unique IP address on your network Manager LAN IP Mask Enter an appropriate IP subnet mask See Subnet Masking in Appendix A for more information about subnet masks Network Type Toggle the network type to match the ISDN service provided by your ISDN service provider Figure 1 10 Setting The Unit Name SPID 1 and 2 Service Profile IDs SPID are used by s...

Page 37: ...ts to the Novell network Call Type Set the Call Type for each ISDN number Use 64k Unrestricted for Euro ISDN lines Use 56k V 110 or 56k_restricted in the USA depending on the requirements of your ISDN service provider Press CTRL E to submit this information When you do this the unit automatically makes a short call to the remote unit to interrogate the remote network for information about its serv...

Page 38: ... the requirements of your ISDN service provider Remote IP Address Type the IP address of the remote IP host to which you want to connect Press CTRL E to submit this information An entry is made in the autocall table so that if any data destined to the remote host a call is made automatically and a connection made to the remote IP network Enter SAVE at the command prompt to permanently store this c...

Page 39: ...re the unit to operate as a router to prevent this problem occurring altogether However this requires that each site consists of separate subnets See the next section for more information Connecting to an IP Host on a Different IP Network To connect to an IP host on a different network using FastConnect enter IPR at the command prompt on the Quick Configuration screen to display the screen illustr...

Page 40: ...address IP Address at the other end of the ISDN link By default this field is set to 0 0 0 0 indicating unnumbered links are being used If you are using numbered links type the IP address of the remote ISDN port on the unit to which you want to connect It must be on the same network or subnetwork as the local ISDN port IP Mask of the ISDN Link If you are using unnumbered links leave this field set...

Page 41: ...correct values for these fields Name of your Internet Provider or remote site Type the name of your Internet service provider or of the remote unit that connects to the remote IP network ISDN Number of the remote unit Type the ISDN number of the remote unit that connects to the remote IP network Call Type Set the Call Type for each ISDN number Use 64k Unrestricted for Euro ISDN lines Use 56k V 110...

Page 42: ... addresses you have selected for the ISDN ports at both ends of the link See Appendix A for more information about subnet masks IP Address of the Remote Host Type the IP address of a host on the remote network to which you want to connect IP Mask of the remote host s network Type an IP subnet mask to filter connections to inappropriate hosts See Appendix A for more information about subnet masks M...

Page 43: ...e password is case sensitive CHAP Password to login to Remote Site By default this is set to UNUSED If you need to use a CHAP password enter the password provided by your Internet service provider or the system administrator responsible for the remote router This password is submitted to the remote unit for it to verify The password is case sensitive To ensure security it is recommended that the l...

Page 44: ...mited set up ISDN Timebands or set the Maximum Call Duration parameter See the Software Reference guide for more information on these features Setting Up a WAN Link If you are using the OfficeConnect Remote to connect to a remote site over a leased line link the initial setup is very simple 1 Before you power on the unit connect an appropriate WAN cable to the WAN port on the rear of the unit If y...

Page 45: ...tting e If necessary change any of the other parameters to suit your WAN link In most cases the defaults can be used f Press CTRL E to submit this configuration The WAN port is now configured and provided the remote unit s WAN port has also been configured data will be passed across the link Enter SAVE at the command prompt to permanently store this configuration in the unit s memory Figure 1 15 E...

Page 46: ... on Novell NetWare servers and users may need to access information stored on servers in other locations If you are using ISDN to connect to the remote site you can configure the OfficeConnect Remote to automatically call and connect to remote Novell servers when connection is required During configuration once you have entered the ISDN number for the remote site the OfficeConnect Remote makes a c...

Page 47: ...ations or even a single workstation such as in the case of a homeworker The Remote Site may be a central site for an organization or simply another like sized office If you are connecting to the remote site over a WAN leased line link the OfficeConnect Remote has no need to spoof the IPX protocol as there is a permanent connection in place Once the OfficeConnect Remote has determined that the serv...

Page 48: ...wn in Figure 1 17 During configuration you enter the ISDN number and the IP addresses of any hosts to which you want to connect In the example in Figure 1 17 the IP address of the host 191 000 000 100 is used and only when data destined for this device is received by the OfficeConnect Remote is a call made to the remote site Figure 1 17 IP Bridged Network There are some issues about which you shou...

Page 49: ...information about IP routing IP Host on Another IP Network Most organizations using TCP IP protocols on their network choose to subnet remote sites or even to have them on different networks This requires that connections to remote sites are routed rather than bridged The advantage of routing over bridging is that calls to the remote site are only made when data is specifically addressed to a remo...

Page 50: ...unit uses FastConnect its own proprietary high speed protocol However in order to connect with other routers it needs to be configured to use the slower PPP protocol PPP is used by many other routers Increasingly Internet service providers are offering access to the Internet over ISDN via an ISDN router PPP routing over ISDN allows a simple cost effective connection to the Internet or into a large...

Page 51: ...Examples of Typical ISDN Networking Applications 1 37 Figure 1 19 PPP Connections to the Internet and Corporate Network Rc bk RC01 FRM Page 37 Thursday July 10 1997 9 53 AM ...

Page 52: ...ol The local site shown in Figure 1 20 is a small business that needs data links to several of its clients and a connection to the Internet It has an IPX connection to access information on one client s NetWare server and IP routed connections to several IP hosts at different clients sites Finally there is a connection to the local Internet service provider s PPP router giving fast access to the I...

Page 53: ...e problems with the unit the following procedure will enable you to undertake basic troubleshooting before contacting your 3Com reseller Malfunction Remedy If you cannot connect your OfficeConnect Remote to the network or PC Verify that your computer is equipped with an available serial port and that the correct cables and connectors are being used If in doubt contact the unit s supplier The POWER...

Page 54: ...P cable into an alternate ISDN service socket to confirm that it functions g Try using an alternate UTP cable to connect the unit to the ISDN service socket Malfunction Remedy If other LEDs do not light during operation of the unit During normal operation the remaining unit LEDs should light and extinguish depending on the action being taken If the LEDs fail to light in accordance with their funct...

Page 55: ...ng over slower speed terrestrial and satellite links In the following sections we describe the concepts behind bridging and routing and discuss the different ways in which LANs can be configured and operated to optimize performance and minimize disruption of traffic on each individual LAN Bridging and Routing Concepts A bridge connects one or more LANs together It examines each data frame received...

Page 56: ...the Internet you must configure the unit as a router How Bridges Learn When a bridge is first powered on it does not know the number or the locations of stations that are connected to the LAN To minimize the amount of data passed over the bridge it must learn the whereabouts address of stations to ensure that it passes only the data that is intended to be passed over the bridge Like the envelope o...

Page 57: ... turned off although this will not normally prove necessary unless specific traffic filtering is required You can also configure a number of other features to improve the performance and operation of the OfficeConnect Remote These include sophisticated frame filtering techniques so that only certain types of frame or those associated with particular work groups are passed between specific segments...

Page 58: ...on incoming calls and switches to the protocol necessary for that connection If you are using ISDN to connect to different networks the two B channels can be used independently to connect to different networks at the same time Building a Larger Network Large networks of interconnected LANs can be established by using multiple bridges as illustrated in Figure A 2 The bridges build up their address ...

Page 59: ...s problems resulting from a loop around which frames could endlessly travel if precautions aren t taken by the bridges Over ISDN links a proprietary form of loop control is implemented On WAN leased line links the Spanning Tree Protocol STP prevents data loops On startup the bridges send out frames to enquire if there are other bridges on the network By exchanging information the bridges block por...

Page 60: ...all one logical network from another Optimum Use of Resource Bridged networks use Spanning Tree Protocol STP to provide network resilience by retaining redundant links on stand by in case the primary link fails This means that you are not making maximum use of available resources Routing protocols make each node aware of the primary and alternate routes available ensuring that resources particular...

Page 61: ...is based on obtaining and abiding by a registered Internet address range This makes a router the ideal choice for accessing the Internet Unfortunately new applicants are likely to only get a Class C registered Internet address preventing more than 254 connections on one bridged IP LAN Routing IP and IPX Running a bridged network allows workstations to communicate directly between one another A PC ...

Page 62: ...uld also share the same IPX network number If each of the bridged LANs supported a network server each with its own unique network number and an IPX address is misconfigured the NetWare network server consoles will report the message Router Configuration Error Router XXXXX claims that LAN is XX XX XX XX The router it refers to is in fact the network server Figure A 4 Open Systems Interconnection N...

Page 63: ...establish where to forward the data packet It is possible that the LAN 1 router has multiple outgoing ports that would allow different transmission routes to the destination network In our example using Figure A 3 a packet could go via Router D to get to Router B or it could go more directly across a single direct link between Router A and Router B Figure A 5 Data Packet Containing Hardware And So...

Page 64: ...ally setting up the network the OfficeConnect Remote is manually connected over the ISDN for a three minute period in order to learn the topology of the rest of the network Once this has been performed the OfficeConnect Remote will only make ISDN calls to transmit data packets While this data transfer is in progress RIP updates will be piggybacked on to the call updating both parts of the network ...

Page 65: ...rk numbering must reflect that situation In a Novell IPX environment we could allocate IPX network numbers 00000111 to LAN A 00000222 to LAN B and 00000333 to LAN C Having configured the ports of the OfficeConnect Remote to accept this protocol routing will now occur between the remote network servers and workstations but addressed by different network numbers It should be noted that NetWare 3 X a...

Page 66: ...bers in the first second bytes will be in the range 128 001 to 191 254 For a Class C IP address the numbers in the first second third bytes will be in the range 192 000 001 to 223 255 254 For example Class A 1 123 123 123 Network Host Class B 128 001 123 123 Network Host Class C 192 123 123 123 Network Host Using of any of the address classes in a private TCP IP network is not a problem providing ...

Page 67: ... use subnet masking to enable ISDN Autocalls to be made on groups of IP addresses or on specific IP addresses Normally a subnet mask would be set so that any IP address in a range of hosts on a destination LAN which are detected on the unit s locally connected LAN port causes an ISDN Autocall to be made out to that destination This is achieved by the addition of a xx number at the end of the confi...

Page 68: ... these addresses hostmaster rs internic net host domain network changes and updates action rs internic net computer operations mailserv rs internic net automatic mail service info internic net automatic mail service for general enquiries refdesk is internic net enquiries not handled by the services above Europe RIPE Attention RIPE NCC Kruislaan 409 NL 1098 SJ Amsterdam The Netherlands Telephone 31...

Page 69: ...by either LAN at each end of the link An example is shown in Figure A 6 In this example the Local Site uses the network address 191 000 100 xxx on its LAN The remote site uses the network address 191 000 200 on its LAN and the link uses 191 000 300 Figure A 6 Example of a Numbered Link By default the WAN port and ISDN port have an IP address of 10 0 0 1 This is set to allow remote Telnet connectio...

Page 70: ...A 16 BRIDGING AND ROUTING Rc bk RCAPPA FRM Page 16 Thursday July 10 1997 9 53 AM ...

Page 71: ...ic rate ISDN service via an RJ45 connector socket Voice Connector Interface Provides interface for analog telephony equipment via RJ11 connector socket Adaptors may be required for some telephone equipment connections Management Connector Interface 9 way D type connector for use with a VT100 compliant terminal or PC Local and remote terminal management TCP IP Telnet menu driven management interfac...

Page 72: ...ass A and EN 50082 susceptibility However to fully comply with Class B of EN55022 the following prerequisites should be observed The WAN port must be attached to a screened digital cable The ISDN cable must be used in conjunction with a three turn ferrite The product carries the CE certification mark to indicate conformance with the following EU directives LVD Low Voltage Directive Safety 73 23 EE...

Page 73: ...g the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorientate the receiving antenna Relocate the product away from the receiver Plug the unit into a different outlet so that the computer and the receiver are in different branch circuits Ensure that all product fixing screws attachment connector screws and ground wires are ...

Page 74: ...B 4 TECHNICAL INFORMATION Dimensions Rc bk RCAPPB FRM Page 4 Thursday July 10 1997 9 53 AM ...

Page 75: ...the unit The following signalling characteristics should be observed when purchasing or fabricating a suitable cable Pin Links 3Com end pin no 25 way male Signal name Client end pin no 15 way male D type connector 2 Transmit Data A TXDA 2 3 Receive Data RXDA 4 7 Signal Ground Receive Data 8 12 Signal Ground 13 Indicate B INDB 12 14 Transmit Data B TXDB 9 15 Indicate A INDA 5 16 Receive Data B RXDB...

Page 76: ... D type connector 2 Transmit Data TXD 103 2 3 Receive Data RXD 104 3 4 Request To Send RTS 105 4 5 Clear To Send RTS 106 5 6 Data Set Ready DSR 107 6 7 Signal Ground 102 7 8 Data Carrier Detect DCD 109 8 11 Signal Ground AutoSense 12 Signal Ground AutoSense 15 Transmit Clock TXCLK 114 15 17 Receive Clock RXCLK 115 17 18 Analog Loop Test 141 18 20 Data Terminal Ready DTR 108 20 21 Remote Digital Lo...

Page 77: ...e Signal name Client end pin no 34 way MRAC connector 2 Transmit Data TXD 103 P 3 Receive Data RXD 104 R 4 Request To Send RTS 105 C 5 Clear To Send RTS 106 D 6 Data Set Ready DSR 107 E 7 Signal Ground 102 Clear To Send B 8 Data Carrier Detect DCD 109 F 11 Signal Ground 13 Serial Clock Transmit B SCTB 114 AA 14 Transmit Data B TXDB 103 S 15 Serial Clock Transmit A SCTA 114 Y 16 Receive Data B RXDB...

Page 78: ...or Com port end pin number 9 way male female connector Shell Screen Screen Shell 3 TxD RxD 2 2 RxD TxD 3 5 Ground Ground 5 7 RTS not connected RTS not connected 7 8 CTS DTR 4 6 DSR CTS 8 1 DCD DSR 6 4 DTR DCD 1 3Com end pin no 9 way male connector Signal Name Pin Links Signal Name Terminal or Com port end pin number 25 way male female connector Shell Screen Screen 1 3 TxD RxD 3 2 RxD TxD 2 5 Groun...

Page 79: ... 10BaseT port on another device The table below shows the pin outs for a straight through cable 3Com end pin no 9 way male connector Signal Name Pin Links Signal Name Terminal or Com port end pin number 25 way male female connector Shell Screen Screen 1 3 TxD TxD 2 2 RxD RxD 3 7 RTS RTS 4 8 CTS CTS 5 6 DSR DSR 6 5 Ground Ground 7 1 DCD DCD 8 4 DTR DTR 20 Pin Links 3Com end pin no RJ45 Signal name ...

Page 80: ...6 9 pin D type plug to 9 pin D type socket gender changer Serial Management port cable 731 000024 9 pin D type plug to RJ45 plug with 3 meters of cable 733 000028 RJ45 to RJ45 plug with 1 5 meters of UTP cable ISDN cable 733 000001 RJ45 to RJ45 plug with 3 meters of UTP cable ISDN cable 3C409000 25 pin to 25 pin D type plug with 3 meters of cable V 24 3C409001 25 pin D type plug to 34 way MRAC con...

Page 81: ...ol This is the standard protocol used for Ethernet Refer to CSMA CD Address The unique code assigned to each device or workstation connected to the LAN Age The process of removing an address from the unit s filtering database after the device has not transmitted for a given period of time ANSI American National Standards Institute Application layer Layer seven the uppermost part of the OSI network...

Page 82: ...ridge may be used to extend the network or to connect two different network transport technologies together Broadband A communications technique in which network cabling is used to carry multiple streams of data simultaneously Broadcast Storm A rare event in which broadcast frames are propagated endlessly through the network because poorly configured bridge and router connections Bus A single segm...

Page 83: ...ncreased diameter outer bore and is often yellow or orange in color CSMA CD Carrier Sense Multiple Access with Collision Detection the Ethernet protocol that allows each device to create and send its own data packets CSMA CD is used to avoid excessive collisions between packets as they are randomly transmitted A CSMA CD device first listens for other carriers if it detects no other carriers it wil...

Page 84: ... system to another usually to upgrade or revise system software EPROM Erasable programmable read only memory A chip whose memory can be erased and reused Ethernet A 10 Mbps baseband local area network protocol compatible with IEEE 802 3 standards FastConnect The OfficeConnect Remote s proprietary connection protocol that allows fast connection between units either over the ISDN link or over a perm...

Page 85: ...otocol for Novell s NetWare operating system ISDN Integrated Services Digital Network A multi channel digital end to end telecommunications network that provides a virtually error free transmission of data ISO International Standards Organization Refer to Open Systems Interconnection Kbps A measurement of data transmission speed in kilo bits per second Keep alives A message sent by one network dev...

Page 86: ...files over a UNIX platform Node An alternative name for a computer or device such as a printer or modem that is connected to a network NOS Network operating system OSI Open Systems Interconnection a body of standards set by the International Standards Organization to define the activities that must occur when computers communicate There are seven layers and each contains a specific set of rules to...

Page 87: ... switched telephone network Quick Configuration A set of menu driven forms in the management system that allow you to configure the unit for most types of ISDN connection REN Ringer equivalence number RIP Routing information protocol Router A protocol transparent device that links networks A router can be used to separate unwanted traffic on either side of the bridge reduce the traffic or to provi...

Page 88: ...itable for large networks Thin Ethernet A cabling system for Ethernet connections that uses a lightweight coaxial cable Suitable for small networks Ticks A measurement of the time taken to pass information through a routed network Token Ring A network transport technology in which an electronic token that allows access to the network is passed around stations in the ring Topology The way that a ne...

Page 89: ...modem set your modem to 8 data bits no parity and 1 stop bit Call the telephone number nearest you Access by ISDN ISDN users can dial in to 3ComBBS using a digital modem for fast access up to 56kbps To access 3ComBBS using ISDN dial the following number 1 408 654 2703 Country Data Rate Telephone Number Australia up to 14400 bps 61 2 9955 2073 France up to 14400 bps 33 1 69 86 69 54 Germany up to 9...

Page 90: ...tenance application training and support services When you contact your network supplier for assistance have the following information ready Diagnostic error messages A list of system hardware and software including revision levels Details about recent configuration changes if applicable If you are unable to contact your network supplier see the following section on how to contact 3Com Support fro...

Page 91: ...nce 05 91 79 59 Germany 0130 821502 Hong Kong 852 868 9111 Ireland 1 800 553117 Italy 1678 79489 Japan 81 3 3345 7251 Mexico 525 531 0591 Netherlands 06 0227788 Norway 80013376 Singapore 65 538 9368 South Africa 27 11 803 7404 Spain 900 983125 Sweden 120 795482 Taiwan 886 2 577 4352 United Arab Emirates 971 4 349049 Country Telephone Number U K 0800 966197 U S 1 408 492 1790 Country Telephone Numb...

Page 92: ...D 4 TECHNICAL SUPPORT Rc bk TECHSUPP FRM Page 4 Thursday July 10 1997 9 53 AM ...

Page 93: ...1 25 Internet 1 25 IP hosts on different networks 1 23 IP hosts on same network 1 22 Novell networks 1 21 WAN leased line link 1 28 contents checklist 1 4 crossover switch 1 9 D default password 1 18 E Ethernet 10Base2 port 1 14 10BaseT port 1 9 1 13 example networks 1 30 F feet 1 11 front panel LEDs 1 6 H hub clipping 1 11 I installation 1 10 10Base2 connections 1 14 10BaseT connections 1 13 ISDN...

Page 94: ...1 6 PPP routers 1 25 problem solving 1 36 Q Quick Configuration 1 17 R rear panel 10BaseT port 1 9 ISDN port 1 9 power socket 1 8 reset button 1 8 serial port 1 8 voice port 1 10 WAN port 1 9 rear panel connections 1 8 registration card 1 5 reset button 1 8 returning products for repair D 3 rubber feet 1 11 S serial port 1 8 SERIAL WAN LED 1 7 setting up your unit 1 17 siting the unit 1 10 stackin...

Page 95: ...onsibility for the selection of the appropriate applications program and associated reference materials 3Com makes no warranty that its software products will work in combination with any hardware or applications software products provided by third parties that the operation of the software products will be uninterrupted or error free or that all defects in the software products will be corrected ...

Page 96: ...n the unit Follow the OfficeConnect Remote 530 installation instructions described in the OfficeConnect Remote User Guide Refer to the OfficeConnect Remote Software Reference if further configuration information is required EMC Update The statement on page 4 of the About This Guide section in the OfficeConnect Remote User Guide stating that the ISDN cable must be used in conjunction with a three t...

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