3Com 2940, 2941 manuale d’uso

This manual covers installation and operating instructions for the following 3Com ® modems: U.S. Robotics ® Cable Modem CMX 3 CR292-DE56 (model 2940) U.S. Robotics ® Cable Modem CMX 3 CR292-DE40 (model 2941) 3Com, the 3Com logo, U.S. Robotics, the U.S. Robotics logo, EtherL ink, and OfficeConnect are registered trademarks and Connections is a tr[...]

T ABLE OF C ONTENTS Introduction 1 Cable Modem Features 1 Before You Begin 3 Contacting Your L ocal Cable Company 3 Preparing Your Workspace 5 You Will Need These I tems 5 Configuring the TCP/ I P Protocol on a Windows PC 6 Configuring the TCP/ I P Protocol on a Macintosh PC 8 Hardware and Software Inst allatio n 11 Wall-Mount I nstallation 11 Desk[...]

Regulatory Informati on and Limited Warrant y 29 Manufacturer’s Dec laration of Conformity 29 3Com Corporation L imited Warranty 32[...]

I NTRODUCTION 1 Congratulations! You have just purchased a modem that features a pioneering new technology . 3Com, a leader in networking and data access, is proud to offer y ou this technology that makes I nternet access possible at speeds previously only imagined! This external cable modem is one part of a comprehensive communications sy stem tha[...]

I NTRODUC TION 2 y our sy stem, and your available hard disk space. • The I nternet browsing, e-mail, or other programs y ou run at the same time, which use y our computer’s resources. • The capacity of the I nternet service you order from y our provider. • Changing network traffic levels depending when y ou go online.[...]

B EFORE Y OU B EGIN 3 This chapter explains how to prepare your computer sy stem for cable modem installation. Contacting Y our Local Cable Company I n order to use your cable modem, y ou need to establish an I nternet access account with y our local cabl e company . Before contacting your c able company to establish an account, have the following [...]

B EFORE Y OU B EGIN 4 You should now contact y our local cable company and verify the following: • You h ave cable service to you r hom e that supports two-way cable modem access. I f your cable company does not provide two-way service, the U.S. Robotics Cable Modem CMX will not be able to communicate with y our cable company’ s Internet access[...]

B EFORE Y OU B EGIN 5 Pr eparing Y our W orkspace • Position y our computer so that it is located near your cable outlet. • The cable modem should be located near y our computer and the cable outlet. There should be plenty of room to guide the cables away from the modem without crimping the cables. • The modem should be located where it has a[...]

B EFORE Y OU B EGIN 6 • Fold-out Quick Installation Guide • This User’s Guide & Reference Not Included: • A PC running Windows  95 (or later) or a Macintosh  running Sy stem 7.5 (or later) with TCP/I P protocol installed (see the following two sections for more information on installing TCP/IP) • An active two-way cable line •[...]

B EFORE Y OU B EGIN 7 NOTE: If you need to inst all a network interface card to give your computer Ethernet capability but have not yet done so , perform this operation first by consult ing your NIC inst allation manual and then retu rn here to complete inst allation of the TC P/IP software. 1. Click Start , point to Sett ings , and then click Cont[...]

B EFORE Y OU B EGIN 8 7. “TCP/ I P” will appea r in the list of installed network components. Click OK . 8. Windows will now ask y ou if y ou would like to restart y our computer. Clic k No . 9. Your cable compan y ma y provide y ou with additional TCP/ I P setup instructions. Consult those instructions, if provided, to complete configuration o[...]

B EFORE Y OU B EGIN 9 I f you do not see this icon, y ou must reinstall y our Macintosh sy stem software and add networking support. Consult y our Macintosh User Manual for more information on how to do this. 4. Exit out of all open windows. 5. Your cable company may provide y ou with additional TCP/I P setup instructions. Consult those instruction[...]

B EFORE Y OU B EGIN 10[...]

H ARDWARE AND S OFTWARE I NSTALLATION 11 NOTE: Before installi ng your mode m, write its seria l number in the space prov ided on the first page of this manual. (You’ll find the ser ial number above the bar code on the whit e sticker on the back of t he modem and on the outside of the modem’s box.) If you ever call our customer support departme[...]

H ARDWARE AND S OFTWARE I NSTALLATION 12 mounting holes ® These slots fit over the heads of wall - mounting screws to se cure the modem to the wall. A mounting te mplate for marking the location of the mounting screws is included in the foldout Installation Guide that accompanies t his manual. 1. Remove the mounting template from the Installation [...]

H ARDWARE AND S OFTWARE I NSTALLATION 13 20" [ 50 cm ] INSTRUCTIONS FOR WALL-MOUNTING THE CABLE MODEM Wall-mounting T emplate See other side for basic instructions. For complete instructions, see the User's Guide & Reference . ® I f you have not already done so, turn to “Connecting the Cable Modem to Your Computer” (page 15). Oth[...]

H ARDWARE AND S OFTWARE I NSTALLATION 14 securely stack y our cable mode m with the OfficeConnect unit(s). I f possible, your cable modem should alway s be the top unit in a stack with OfficeConnect products. Small hubs are the only units that should be clipped to the top of a cable modem. Follow these instructions to clip y our modem to a n Office[...]

H ARDWARE AND S OFTWARE I NSTALLATION 15 Conne cting the Cable Modem to Y our Computer TIP : Before you unplug any cords, label them or make a sketch of how they are connected. This can be helpful when you plug them back in later. CAUTION : To avoid risk of electric shock, make sure your computer and all peripher al devices are turned off and unplu[...]

H ARDWARE AND S OFTWARE I NSTALLATION 16 NOTE: Refer to the diagram on t he following page while following t hese steps. 1. Turn off y our computer and unplug it from the electrical outlet. 2. Using the following illustration as a g uide, make the following connections: • Connect your cable line to the cable modem’s CATV cabl e connector. Be ca[...]

H ARDWARE AND S OFTWARE I NSTALLATION 17 are lig hted solid green. I f y ou are powering up y our cable modem for the first time, allow 5 to 15 minutes for this process to co mplete. Consult the chapter title d “Cable Modem Operation” for a more in-depth description of the front panel LED indicators. CA TV SERIAL 10 BT cable line (to cab le out[...]

H ARDWARE AND S OFTWARE I NSTALLATION 18 13 2 12 3 11 4 10 5 9 6 8 7 15 25 85 30 80 45 75 50 70 55 65 60 RJ-45 cable (to NIC) cable outlet Cable Modem PC Link Cable Status Powe r Status Activity Activity FCN power supply cab le (to wall outlet) 3 Com U.S. Robotics Cable Modem CMX Installing the Cable Connections CD-ROM Although y ou do not need to [...]

C ABLE M ODEM O PERATION 19 Once y our cable modem is properly installed and power supply is connected to AC power, it will automatica lly sca n for the active cable modem channel from y our cable c ompany ’s server. Once the front panel LEDs indicate the modem is connected to the server, all y ou need to do is launch y our Internet or e-mail sof[...]

C ABLE M ODEM O PERATION 20 1. Cable Mod em P ow er - I ndicates power is applied to the cable modem. This light is solid green when the modem is on. 2. Cable Mode m Status - This L ED varies in color (orange and g reen) and indicates the modem’s status as described in the following chart: LED STATE SHORT OFF, LONG ORANGE ORANGE SHORT OFF, SHORT [...]

C ABLE M ODEM O PERATION 21 5. Cable Activity - Indicates that data is being transmitted to or from y our cable compa ny over the RF (cable) port. Flashing orang e indicates traffic. 6. FCN - Individual cable operators determine the function of this L ED.[...]

C ABLE M ODEM O PERATION 22[...]

T ROUBLESHOOTING AND S UPPORT R ESOURCES 23 PROBLEM I cannot access my email or Internet service. The Cable Status LED never stops blinking. POSSIBLE SOLUTION 1. Check all connections. Make sure th e cable line is securel y connected to the cable jack on the back of t he modem. Verify that the RJ 45 cable is securely plugged into both th e modem an[...]

T ROUBL ESHOO TING AND S UPPORT R ESOURCES 24 PROBLEM All of LEDs on the front of my modem look right, but I still can’t access the Internet. The power on my modem goes on and off sporadically. The Cable Modem Status light never stops blinking. POSSIBLE SOLUTION 1. If the Cable Modem Power, Cable Modem Status, and PC Link Status L EDs are on but [...]

T ROUBL ESHOO TING AND S UPPORT R ESOURCES 25 Support Re source s 3 Com BBS Dial the 3Com BBS, 847-262-6000, using the communications software of y our choice. Internet FTP Our ftp site provides a free library containing the same files as the B BS site. FTP to ftp.usr.com . Internet on Demand Our I nternet on Demand site provides automated technica[...]

T ROUBL ESHOO TING AND S UPPORT R ESOURCES 26 90-Day Free Installat ion Support 3Com offers free 90 day installation support for this product. Please call the following toll-free number. 90-Day Free Installation Support 888-877-5040 After the 90 day limit, refer to our pay - per-call options below. Technical Support Hotline Technical questions abou[...]

T ROUBL ESHOO TING AND S UPPORT R ESOURCES 27 the modem to us. Ship the unit, postag e paid, in a strong box made of corrugated cardboard with plenty of packing material. DO NOT send the modem back in the original box. Send ONLY the modem (NOT manuals, diskettes, etc.). I nclude y our SRO number, name, and address on the shipping la bel as well as [...]

T ROUBL ESHOO TING AND S UPPORT R ESOURCES 28[...]

R EGULATORY I NFORMATION AND L IMITED W ARRANTY 29 Manufactur er’s De claration of Conformity 3Com 3800 Golf Road Rolling Meadows, I L 60008 U.S.A. declares that the product U.S. Robotics Cable Modem CMX conforms to the FCC’s specifications: Part 15: Operation is subject to the following two conditions: (1) this device may not cause harmful ele[...]

R EGULAT ORY I NFORMATION AND L IMITED W ARRANTY 30 Export Notices • Unlawful to export from the US or Canada without an approved US Department of Commerce export license. • The hardware contained in this product contains encry ption software which may not be exported or transferred from the US or Canada without an approved US Department of Com[...]

R EGULAT ORY I NFORMATION AND L IMITED W ARRANTY 31 Cet appareil numé rique respecte le s limites de bruits radioélectriques applicables aux appareils numériques de Classe B préscrites dans la norme sur le maté riel brouilleur: Appareils Numériques , NMB-003 édictée par l'I ndustrie Canada. UL Listing/CUL Listing This information techn[...]

R EGULAT ORY I NFORMATION AND L IMITED W ARRANTY 32 • Relocate the com puter and/or the receiver so that they are on separate branch circuits. I f necessary, consult y our dealer or an experienced radio/television technician for additional sugge stions. You may find the following booklet, prepared by the Federal Communications Commission, helpful[...]

R EGULAT ORY I NFORMATION AND L IMITED W ARRANTY 33 or reconditioned. 3Com warrants any replaced or repaired product or part for ninety (90) day s from shipment, or the remainder of the initial wa rranty period, whichever is longer. YEAR 2000 WARRANTY: I n addition to the Hardware Warranty stated above, 3Com warrants that each product sold or licen[...]

R EGULAT ORY I NFORMATION AND L IMITED W ARRANTY 34 OBTAINING WARRANTY SERVICE: Customer must contact a 3Com Corporate Service Center or an Authorized 3Com Service Cente r within the applicable warranty period to obtain warranty service authorization. Dated proof of purchase from 3Com or its authorized reseller may be required. Products returned to[...]

R EGULAT ORY I NFORMATION AND L IMITED W ARRANTY 35 3Com shall not be responsible for any software, firmware, information, or memory data of Customer contained in, stored on, or integrated with any products returned to 3Com for repair, whether under warranty or not. WARRANTIES EXCLUSIVE: IF A 3COM PRODUCT DOES NOT OPERATE AS WARRANTED ABOVE, CUSTOM[...]

R EGULAT ORY I NFORMATION AND L IMITED W ARRANTY 36 AND EXAMI NATION DI SC LOSE THAT THE ALL EGED DEFECT OR MALF UNCTION I N THE PRODUCT DOES NOT EXIST OR WAS CAUSED BY CUSTOMER'S OR ANY THI RD PERSON'S MI SUSE, NEG LECT, I MP ROPER INSTAL LATI ON OR TESTING, UNAUTHORI ZED ATTEMPTS TO OPEN, REPAI R OR MODI FY THE PR ODUCT, OR ANY OTHER CA[...]

R EGULAT ORY I NFORMATION AND L IMITED W ARRANTY 37 PROVIDED HEREI N SHALL FAIL OF I TS ESSENTI AL PURPO SE. DISCLAIMER: Some countries, states, or provinces do not allow the exclusion or limitation of implied warranties or the limitation of incidental or c onsequential damages for certain products supplied to consumers, or the limita tion of liabi[...]