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copyright AT&T 1992 Solidly-built, solidly-backed by AT&T! NEW! ALL-IN-ONE, HIGH-SPEED AT&T DATAPORT FAX MODEMS Featuring the AT&T DataPort 14.4/Fax Modem. AT&T's family of all-in-one DataPort fax modems meets your complete business and personal dial-up needs. Powerful and robust, DataPort fax modems pay for themselves by significantly reducing your long distance phone costs. Assuring the industry's widest range of compatibility, backed by AT&T with a limited lifetime warranty and helpful, toll-free service and support. For IBM PC/AT/XTs and Macintosh, choose from 5 models to exactly meet your price/performance and feature/function needs. THE VALUE-PACKED DATAPORT FAMILY Features 14.4/Fax 9.6/Fax 14.4 V.32bis (14,400 bps) Yes --- Yes V.32-103J (9,600 to 300 bps) Yes Yes Yes V.42bis (data compression, MNP5) Yes Yes Yes Optical phone Line Interface (OLI) patent pending Yes Yes Yes 16550A buffered UART port (PC-internal card) Yes Yes --- Fax line rate compatability (bps): 9,600 to 9,600 to --- 2,400 2,400 Effective throughput, up to (bps): 57,600 38,400 57,600 Lifetime Warranty Yes Yes --- Models: External Yes Yes Yes Internal Yes Yes --- AMAZING SPEED! The DataPort family of high-speed fax modems delivers the highest performance in the industry--tested and proven the leader in connecting calls, even on noisy, impaired lines. Here's how. The DataPort family features AT&T's new, exclusive Optical phone Line Interface (OLI), patent pending, an optical coupler between the phone line and modem that outperforms conventional transformer-based technology. Modem couplers serve to protect the modem's circuitry. However, traditional transformer-based couplers normally add some noise to the data stream. On bad lines, when noise starts to overpower your data, this additional distortion can cause the modem to fall back in speed and fail to perform. In contrast, AT&T's advanced Optical phone Line Interface limits distortion, sustains the signal quality, and maintains higher speeds--even on weak "real world" phone lines. By maintaining higher speeds, and by using data compression (V.42bis) and error correction (V.42), the DataPort 14.4/Fax Modem gives you effective throughput of up to 57,600 bps across ordinary phone lines. That's 4 times faster than lesser 14,400 bps modems and 24 times faster than 2,400 bps modems! REMARKABLE VALUE! Faster transmission means lower line costs. Simply put, the DataPort 14.4/Fax Modem can save you enough in long distance costs to pay for itself in less than six months. After that, your monthly long distance savings puts money in your pocket! Look at how quickly it pays you back. (See illustration below.) Based on sending 1 Megabyte of data per week at a long distance phone line cost of 20¢ a minute, a 2,400 bps modem takes 70 minutes to transfer data, while the DataPort 14.4/Fax Modem takes only 4.2 minutes; assumes an average throughput of 40,000 bps; maximum throughput up to 57,600 bps. The DataPort 9.6/Fax Modem delivers comparable savings at 9,600 bps. Both models expand your personal computer into a fax workstation--for the price of fax machine alone! You only need-- and pay for--one phone line for both modem and fax. ALL-IN-ONE DATAPORT FAX MODEMS Send/receive text, data, and images Link PCs to PCs, fax machines, and mainframes Connect remote offices and homes to corporate headquarters Transfer data files Exchange images with fax machines Dial into E-mail, bulletin boards, and information services Your productivity improves, too, so figure in your time-savings. There's no more waiting for your screen to refresh. The all-in- one high-speed DataPort fax modems: Come pre-configured, ready to use; easy to operate Save time waiting in line to send faxes Allow you to send presentation-quality faxes, and Receive faxes even if you've been working on your PC! The DataPort family is a good value in other ways, too. You get FREE, powerful yet friendly QuickLink II communications/fax software for DOS and Windows. And you get a FREE CompuServe bonus, a $22.95 value. Available soon with software support for the Macintosh. HASSLE-FREE COMPATIBILITY! Designed by AT&T Bell Laboratories and AT&T Paradyne; tested and proven to be compatible with virtually all modems. DataPort modems automatically sense and adjust to the line speed of other modems, and easily connect--even to older, slower modems. And DataPort fax modems are compatible with standard 9,600 to 2,400 bps fax machines and fax modems (Group 3), and certified to work with popular communications/fax software (Class 1). UNSURPASSED AT&T RELIABILITY The DataPort family features the same robust, award-winning technology designed for large data centers by AT&T Bell Labs and AT&T Paradyne. We invented modem technology over 35 years ago. In rigorous laboratory testing and daily use, we've demonstrated our solid product reliability. The DataPort builds on this excellence, and to prove it, AT&T backs the DataPort with a lifetime warranty and toll-free service and support. Now you can enjoy the benefits of our experience: highest performance, excellent value, and the industry's widest compatibility. Proudly made by AT&T Paradyne in the USA. JUST ASK AT&T. WE'LL GLADLY HELP YOU. WHICH FAX MODEM IS RIGHT FOR YOU? AT&T has the answer. Choose from five models in the DataPort family to serve your exact needs. WHAT IS THE REAL-LIFE DIFFERENCE BETWEEN 14,400 AND 9,600 BPS? Speed really pays when you typically dial long distance to your customers, headquarters office, information services, and bulletin boards--especially to transfer data-intensive files and fax images. Also, think ahead to serving your future customers and to accessing new databases for business or home. The high- speed DataPort 14.4/Fax Modem runs nearly 24 times faster than 2,400 bps modems and significantly rewards you in phone line cost savings. The DataPort 9.6/Fax Modem is ideally suited for mostly- local fax and modem use. And it's the next best value to the DataPort 14.4/Fax Modem. WHAT ARE THE ADVANTAGES OF AN INTERNAL VS. EXTERNAL MODEL? The DataPort family's AT-bus internal card modem fits neatly inside your PC. It conserves desktop space and requires no additional connector cables. Further, it discourages unwanted access when you're not around. On the other hand, an external modem frees space inside your PC and facilitates sharing the DataPort fax modem with PCs near your desk. And it can easily serve double-duty for office and home. HOW IMPORTANT IS COMPATIBILITY? Very important, especially with today's varying modems, speeds, and standards. If you can't easily connect to new online services, BBSs, customers and prospects, it's frustrating and embarrassing. Moreover lengthy re-trying increases your long distance costs. DataPort fax modems will sense and adjust to slower speeds and connect easily, even to older modems. You gain the highest compatibility in the industry. HOW DOES THE FAX WORK? DataPort fax modems let you transmit fax images directly to and from fax machines and fax modems, without the expense of a separate fax machine. And because you send faxes directly from your desktop computer, the receiving fax machine can print presentation-quality images without getting that "faxed" look. You can print faxes on your laser printer and save the cost and inconvenience of stocking fax paper. WHAT IF I DON'T NEED FAX CAPABILITY? If you really think you'll never miss having an all-in-one fax and modem, then choose the DataPort 14.4 Modem. It gives you high-speed 14,400 bps performance, compatibility, and reliability--backed by AT&T! EXCITING DATAPORT FAMILY HIGH-SPEED FAX MODEMS. Highest Performance. Through AT&T's Optical phone Line Interface (OLI), pat. pending, and using V.42bis data compression and V.42 error correction, the DataPort family of fax modems connects more easily and maintains high speeds and data integrity, even on noisy, impaired lines. Achieves an effective throughput of up to 38,400 and 57,600 bps. Excellent Value. Faster transmission means lower long distance phone costs. Improves productivity, saves time. FREE communications/fax software for DOS and Windows included. Also ask about software support for the Macintosh. Industry's Widest Compatibility. DataPort fax modems sense and adjust to the line speed of other modems; connect to high-speed modems and all speeds down to 300 bps. AT&T Commitment. Reliability backed by AT&T's lifetime warranty and helpful, toll-free support. DataPort 14.4/Fax Modem (V.32bis) Standalone, suggested retail, $555 PC/AT-internal card, suggested retail, $505 DataPort 9.6/Fax Modem (V.32) Standalone, suggested retail, $445 PC/AT-internal card, suggested retail, $415 DataPort 14.4 Modem (V.32bis) standalone, suggested retail $515 Included with your DataPort family product: User's manual, phone cord; lifetime warranty, toll-free technical support, FREE QuickLink II software for DOS and Windows, and FREE CompuServe bonus ($22.95 value). Begin saving on your long distance costs today! SPECIFICATIONS CCITT 14.4 models--V.32bis, V.32, V.22bis,V.22, V.21, V .23; Bell 212A, Bell 103J 9.6 models--V.32, V.22bis, V.22, V.21, V .23; Bell 212A, Bell 103J FAX ( Fax models only) V.29, V.27ter (Group 3) PC FAX EIA/TIA-578 Class 1 compatible LINE DATA RATES 14.4 models--14,400 bps to 300 bps 9.6 models--9,600 to 300 bps LINE FAX RATES: 9,600, 7,200, 4,800, and 2,400 bps DATA COMPRESSION: CCITT V.42bis or MNP 5 ERROR CORRECTION: CCITT V.42 or MNP 4-2 AUTORATE: 14,400 12,000, 9,600, 7,200, 4,800 bps (V.32bis) FALL BACK/FORWARD: 9,600 and 4,800 (V.32) DTE RATES: To 57,600 (14.4 models), To 38,400 bps (9.6 models) COMMAND SET: HAYES AT FRONT PANEL INDICATORS, External models: EC, HS, CD, OH, RD, SD, TR, MR TELEPHONE INTERFACE: Dial line, RJ11C permissive DTE INTERFACE: EIA/TIA 232E; CCITT V.24, V.28 COMM PORT: COM 1-4, 16550A buffered UART (or compatible) DIMENSIONS External models Size: 6.0 in (15.0 cm) W, 1.25 in (3.0 cm) H, 8.75 in (22.0) D Weight: 1.3 lbs (.59 Kg) Internal models Size: 0.9 in (2.3 cm) W, 4.78in (12.1 cm) H, 6.08 in (15.4 cm) D Weight: 4.0 oz. (113.36 g) POWER: External models, 5.37 watts CERTIFICATION: DOC 230 4982 A LOAD #7 (External); 230 4980 A LOAD #6 (Internal) ; CSA 22.2 No. 950; UL LISTED 1950; FCC Part 15, Class B; FCC Part 68, AW2USA-73706-FA-E (External), AW2USA-73812- FA-E (Internal) UL logo copyright AT&T 1992 DATAPORT is a trademark of AT&T. All other products or services mentioned are the trademarks, service marks, registered trademarks, or registered service marks of their respective owners. Lifetime warranty is limited and applies to original purchaser only. Printed in the U.S.A. AT&T Paradyne 8545 126th Avenue North Largo, Florida 34649 For more information on the DataPort modems, call: 1 800 554-4996 For information on the Sysop Pricing Program, please write to: Scott Frazee AT&T Paradyne 8545 126th Avenue North P.O. Box 2826 Largo, Florida 34649-2826 or Fax your Sysop Pricing Program request to: (813) 530-2398 Please remember to include a return address with your request. Optical phone Line Interface The Optical Line Interface has two major design and performance advantages over the transformer-based line interface circuits used in other V.32bis modems. First, the Optical Line Interface has a more resistive impedance which allows it to attain a much more consistent "match" to the impedance of the telephone network, reducing both the amount of near-end echo for the AT&T DataPort modem and the far-end echo for any remote modem. As a result, other modems are able to perform more reliably when they connect to the DataPort modems than when they connect to modems with traditional transformer-based designs. Second, when the Optical Line Interface is used to transmit and receive signals, the addition of harmonic distortion products to the signals is greatly reduced. Since harmonic distortion can adversely affect the transmitted signal and the near-end echo signal, the performance of the DataPort modem and the remote modem are both improved as a result. When a V.32bis modem's near-end echo signal includes these harmonic distortion products, its near echo canceler is unable to compensate for them and they pass through to the receiver as noise. Even worse, these distortion products may be boosted by the modem's equalizer circuit as it tries to compensate for the signal attenuation which occurs in the network. When the presence of these unwanted signals begins to affect the modem's ability to accurately interpret the receive data stream, errors will result. Since the Optical Line Interface reduces both the near-end echo level and the injection of harmonic distortion products, The DataPort modem is able to send data more reliably under a wider variety of network conditions. When you also consider the reduction in far-end echo and harmonic distortion for the remote modem, the benefits of the Optical Line Interface are hard to ignore. For those persons who want a more in-depth understanding of why the above is true, please read on.... Dial modems connect to the tip/ring interface of the PSTN through a "line interface circuit". The function of this circuit is to isolate the higher power signals which are carried across the copper wires and transfer only the lower voltage levels to an Analog/Digital converter and input to the Digital Signal Processor or "data pump". The impedance presented by the line interface circuit at the various signal frequencies transmitted and received through it will affect the " impedance match" of the modem to the network. When the impedance of the modem and the impedance of the network are the same, 100% of the modem's transmit signal energy is transferred into the network and none is reflected. When an impedance mismatch exists, however, signal reflections occur at the modem-to-network interface. These reflections result in "near-end echo", which is an unwanted signal that must be removed from the receive data stream by the modem's echo canceler. The presence of near end echo will cause data errors in a V.32bis modem if the echo canceler cannot accurately eliminate it. In the ideal case, the impedance of the line connected to the modem would be constant regardless of how far the modem is located from the Telephone Central Office Switch. In this ideal case, all modems could be designed to match the network impedance perfectly and no signal reflections would occur. Unfortunately, the impedance characteristics of the copper wire connecting your local phone jack to the Central Office (known as the "local loop") is one of the most widely varying aspects of the telephone network. Although the local loop remains constant from one call to the next, the local loop characteristics vary at each endpoint due to factors such as the distance from the Central Office, the gauge of the copper wire and the existence of loading coils on the loop. As such, a modem designed to interface well with very short, unloaded loops may not work well if it is connected through long, loaded loops, and vice-versa. Due to the electrical properties of reactive components such as capacitors and inductors, the sensitivity of a transformer-based coupling circuit to variations in the network impedance is much greater than that of a purely resistive circuit. The amount of near-end echo is directly related to the impedance mismatch between the modem and the network. When a transformer-based line-interface circuit is designed into a modem, that modem's near echo signal will vary dramatically as it is connected to the various types of local loops which are present in the network. If a modem's line interface were designed with a purely resistive output impedance, that modem's near-end echo signal would remain much more consistent as it was connected to a wide variety of local loop conditions. The Optical Line Interface is one such design, and it allows the DataPort modems to achieve significant performance benefits as a result. Even more importantly, the same impedance mismatch which creates a near-end echo for the local modem will cause a far-end echo for the remote modem. The far-end echo signal is that portion of the remote modem's transmit signal which travels across the network to the local modem, then gets reflected back again to the remote modem. The far-end echo signal is delayed by the round-trip delay present in the network, and it includes all of the impairments which were introduced by a round trip through the network. As such, the far-end echo signal is quite complex and requires sophisticated techniques for accurate cancellation. By reducing the impedance mismatch between the local modem and the network, the Optical Line Interface can reduce the remote modem's far-end echo signal and improve its performance. A second negative aspect of transformer-based line interface circuits is the harmonic distortion which is introduced by the transformer itself. The amount of harmonic distortion introduced by low-cost (and typically small in size) transformers may be considerably worse than the distortion introduced by higher cost (and typical larger) transformers, so the designer's selection of a transformer is a cost versus performance trade-off. The harmonic distortion which is introduced by the transformer affects all signals which pass through it, both transmitted and received. Since harmonic distortion is non-linear in nature, it cannot be compensated for by the modem. Therefore, the modem interprets harmonic distortion signals as noise, potentially causing data errors. The amount of harmonic distortion introduced for the higher level transmit and near-echo signals is much larger than for the lower level receive signals -- it is a non-linear relationship. Consequently, the transmit signals and the near-echo signals are most affected by the introduction of harmonic distortion in a line interface circuit, so both the local and remote modems benefit when the amount of harmonic distortion is reduced. The less-reactive characteristics of the Optical Line Interface design reduce its harmonic distortion, which allows it to consistently outperform transformer-based designs. AT&T PARADYNE - SYSOP PRICING PROGRAM Please return the completed order form to: AT&T Paradyne c/o Scott Frazee Sysop Pricing Program 8545 126th Avenue North P.O. Box 2826 Largo, FL 34649-2826 Fax: (813) 530-2398 Name of Sysop: __________________________________________________ Company: ________________________________________________________ Business Address: _______________________________________________ _________________________________________________________________ Business City, State, Zip Code:__________________________________ _________________________________________________________________ Business (Voice) Phone Number: __________________________________ Shipping Address (if different from above): _____________________ _________________________________________________________________ Shipping City, State, Zip Code: _________________________________ _________________________________________________________________ Home (Voice) Phone Number: ______________________________________ Name of Bulletin Board: _________________________________________ Bulletin Board Phone Number(s): _________________________________ _________________________________________________________________ _________________________________________________________________ Which BBS software package is being used: _______________________ What type of modem (manufacturer and brand) is currently being used: ___________________________________________________________ _________________________________________________________________ How long has the BBS been running: ______________________________ Please leave the current number of active callers and the average calls per week received by your system: _________________________ _________________________________________________________________ _________________________________________________________________ Is the BBS tied into a Net? If "Yes", which Net(Fido, WWIV, RIME, etc.): ____________________________________________________ What is the BBS' Main Focus (File Exchange, Message Base, E-mail, etc.): __________________________________________________ _________________________________________________________________ Is this a Non-profit or Commercial BBS (if Commercial, please include your fee breakdown): ____________________________________ _________________________________________________________________ When is the BBS in operation: ___________________________________ _________________________________________________________________ To verify the preceding information, AT&T Paradyne MUST be provided with a login and password. AT&T Paradyne Login: ____________________________________________ AT&T Paradyne Password: _________________________________________ If you would like for AT&T Paradyne to send additional literature to an affiliate and/or user group, please leave their information below. Name: ___________________________________________________________ Attention: ______________________________________________________ Address: ________________________________________________________ City, State, Zip Code: __________________________________________ Voice Phone Number: _____________________________________________ Data Number: ____________________________________________________ AT&T Paradyne is proud to offer three different DataPort modems under the Sysop Pricing Program. These modems are: FEATURE LIST SYSOP MODEL NUMBER PRICE PRICE DataPort 14.4/Fax Ext. 3710-A1-201 $555 $222 DataPort 14.4/Fax Int. 3721-B1-001 $505 $202 DataPort 14.4 Ext. 3710-A1-211 $515 $206 Ext. = External Modem Int. = Internal Modem YES! I would like to order the following DataPort products. FEATURE QTY. NUMBER SUBTOTAL _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ _________________________________________________________________ Subtotal: ________ All Customers must add-in their applicable sales tax: ________ I prefer the modem be shipped by UPS (add $5): ________ I prefer the modem be shipped by FedEx-2 day(add $15): ________ Total Cost of Order: ___________ NOTE: Sales Tax information must be filled in. If you are exempt from sales tax, a copy of your exemption certificate needs to be included with you order. Enclosed, please find my payment of $_____________ in the form of: Money Order ( ) Mastercard ( ) Visa ( ) American Express ( ) If paying by credit card, the following MUST be completed: Credit Card Number: _____________________________________________ Expiration Date: ________________________________________________ Signature as it appears on the card:_____________________________ Please recognize that this is a discount offer applicable to qualified sysops only and may be terminated and/or altered at AT&T Paradyne's discretion without any prior notification. By signing below, the Sysop acknowledges and agrees to the attached Qualifications. Sysop's Signature Dated: _______________, 19____ ________________________________ AT&T Paradyne By: ____________________________ By: __________________________ (Please Print Your Name) Qualifications: 1. The Sysop has been continuously operating a functional computer bulletin board for the past 6 months. The Sysop further agrees to maintain the on-line bulletin board for 6 months after the sale of the DataPort modems purchased under the Sysop Pricing Program. 2. The Sysop agrees to include an appropriate login notice in a visible and conspicuous place, stating that his/her system is being run off of an AT&T Paradyne DataPort brand modem. 3. The Sysop understands that the number of modems available for purchase under this program is limited only by the number of lines that the bulletin board is currently making use of. For multiple line/node services, the data lines/ nodes must be verifiable. 4. The Sysop understands that his/her order will be shipped within 3 to 4 weeks upon being verified as a Sysop. The verification process includes the return of this order form to AT&T Paradyne by Sysop and a check by AT&T Paradyne to ensure that the Sysop's computer bulletin board is operational. AT&T Paradyne reserves the right to refuse those who do not qualify as a true Sysop.