Dell NW147 56K External USB Modem, Compatible Model Number: RD02-D400

I have had excellent results with this $9.50 (prime shipping) Dell USB-FAX dongle on Windows 10.Reading the other reviews, seems your mileage might vary.Mine worked out-of-box, using VOIP (Google Voice with Obihai 100 adapter) for the past month.I have also tested on our Ooma home phone service, with no problems.I've sent more than 100 pages in the past month, with the largest file 26 pages in size, without a glitch (even if call-waiting clicks in, which surprised me).I have only tested receiving 5 pages, which worked fine on VOIP.Normally, I get my office inbound faxes via Maxemail.com (an e-fax service, so I don't need inbound fax on the modem, and I set Windows Fax & Scan to just outbound only, with ignore incoming phone calls).It does briefly show callerID on windows 10 (although so fast in the corner I often miss it).One reviewer complained about not being able to hear the fax-modem connection "handshake" noises. It is quiet when dialiing and connecting, but you can set Windows 10 fax & scan to sound a completion or failure chime. In any case, the few "failures" I found in windows fax & scan after 5 failed fax-send attempts spread 5 minutes apart, was either I put in fax # wrong, or they disconnected line (Windows F&S reported "busy line"). So those times, I just called with a phone handset to verify if there was a fax on the receiving fax #.For me, the majority of time I am dialing direct the same business faxes, so I use windows Fax & Scan contacts. After getting used to it, being quiet is not bad at all.I have not tested the dial-up data-modem. I suppose it may be important is travelling abroad. This modem chipset is supposed to be certified for 62 countries, and maybe another reviewer can chime in on how well the data-modem function works?One reviewer complained it is mislabelled as class 2 fax driver, which seems to be correct for the fax. BUT, I have had zero issues with running this USB fax-modem with a VOIP phone adapter (saving me money instead of paying per page and uploading to my e-fax provider). I am running on a 5-year old core i3 processor on Windows 10. I have had no fax issues running under heavy network loads (our cable modem is only 15 mbps down / 2 mbps up). The product chipset specs can be found here:http://www.conexant.com/wp-content/uploads/2014/06/pb_CX9ZNR0226.pdfPreviously, I used a Brother injket MFC Multifunction printer copier. It had a network PC-FAX windows 7 driver.When I upgraded to Windows 10, the Brother PC-FAX software no longer works on Win 10, so I switched to e-fax, or print and fax (killing trees).For me, it was economically worthwhile. I'm now saving $50 monthly instead of using e-fax services (about $0.05 / page) for 100 pages / month using this USB fax-modem dongle..Hope you find this info helpful.

This USB 56K modem carries the DELL trademark, and is 7.5 cm x 1.8 cm x 2.3 cm with a cable that is 12.5 cm to the tip of the USB connector from the close edge of the device. The maker is Conexant and comes with a UL certification and various international certifications on a tag, including a certification that the product meets FCC standards. Case markings are RD002-D400, Rev A03, NW147. The device is powered off of the USB port without any external power source. The device worked as a plug and play device that was recognized by Windows 7. No driver installation was needed. There are two LED lights, one for power and the other for connectivity. My internet ISP (AT&T) supplied me with dialup numbers for various cities, including my home town. There are no instructions with this product, but my ISP had generic instructions. You hit the Windows Start button and open Control Panel. In Windows 7 you open the Phone and Modem icon to enter your area code and any dialing rules, then close the icon. Then you open the Network and Sharing icon and select Connect to a Network, then select Dial Up Connection, then enter your username and password. When entering user name I used my email address issued by my ISP and the password that I established with them. Then click Dial. It worked on the first try. To hangup you go back to Connect to a Network and select the Disconnect button. If you want a dialer with options and memory, there are some freeware and shareware dialer programs available on the net, but these are not needed. I bought this product for travel situations where no internet service is available and for backup of my DSL service at home. This appears to be a well engineered product at low cost. Some printed instructions would have been comforting but were not needed with a little bit of guidance from my ISP and some experimentation.

I've used Linux for about 2 years now, and frankly have found very little it will not do (except give me headaches from keeping 27 different antivirus/spyware/firewall/M$ Update/God-knows-what-else updated 12 times per month--but I digress...) Using this fax/modem was no exception. Linux Mint 10 recognized it immediately as soon as it was plugged in. I then downloaded efax and efax-gtk from the repositories, as well as gnome-ppp. I got this primarily as a fax, so that is what I played with first. efax-gtk is the 'front-end' or control panel for efax, and there is one setting change needed to make it work. Under 'File, then Settings, Modem tab, and finally Serial Device', change what is there to ttyACM0 exactly as typed here, including upper and lower case and the zero at the end. Under the Identity tab you can put in your name and your fax number. Click OK. That's it--read the Help pages and fax away. Gnome-ppp is a dial-up Internet access program, and all it needs is to 'detect' the modem--click 'detect' and you're set. It is smart enough to make the change above automatically during the detection process. Hope that helps somebody; thank you once again Amazon!A small but possibly important addition for Linux users...I'm now on Linux Mint 17 and everything still works. But I forgot to mention above that there needs to be a couple changes in the Linux "Users and Groups" settings to make this work. Under "Manage groups", add yourself as a user for group 'DIP', group 'Dialout', and I believe group 'Fax'. Save those changes, reboot, and THEN make the settings adjustments in each of the apps. The apps won't find the fax modem with these changes. Sorry 'bout that, 2 years late...