Editorial Review:Product Description:The HP 640 Professional Quality Plain-paper Fax & Copier is simple to use with efficient one-touch button for quick access to reports, system set up and tools. Be more productive with automatic redial, 50-sheet paper tray, 100 speed dials, 10 one-touch dials and management reporting. Save desktop space with a small footprint and compact, dual-tone styling that blends into any environment. Reduction/Enlargement - 50 to 150% Scan Resolution - Up to 200x200 dpi Grayscale Levels - 64 Standard Paper Handling - 50-sheet input tray, 10-sheet automatic document feeder Custom Media Sizes - 8.5x11 to 8.5x14 Fax Features - Auto-redialing, fax broadcasting (up to 5 locations), auto fax reduction, fax delayed sending, fax forwarding, fax/phone/TAM interface, fax polling, distinctive ring detection, fax telephone mode, remote retrieval, telephone handset, junk barrier, Silent mode, answer mode, redial, loud speaker, volume control and telephone handset Dimensions - Width 14.33 x Depth 12.76 x Height 9.84 (364x324x250mm) Weight - 6.5 pounds (3.0 kg)
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Customer Reviews
Average Rating:
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Great Little Machine
I bought this fax as a replacement for an older film type fax. Good decision! It is quite compact, makes good copies, and is a trouble free fax machine that works well in conjunction with an answering machine.
Rating: 
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Distinctive ring defective
This fax machine is supposed to recognize my distinctive ring. It does not. It randomly picks up my phone calls and screams in their ear. I followed the directons to set it up ( by the way the distinctive ring option is uder the Basic fax menu not the advanced fax menu, as it states in the directions.) I've talked to two different tech guys in India for four hours with no luck. We cleared the machine and started over but no luck. They finally gave up on me and I'm giving up on HP. I had to order another fax from another maker and really don't know what to do with yours.
Rating: -
Excellent Fax for the price
Very good compact fax for occasional use. Very easy setup instructions.
Does not have a lot of bells and whistles but fits the bill for simple fax job at a very good price. Have been very pleased with it.
Rating: -
poor product and poor service
HP 640 Inkjet printer is defective. When unable to begin operations based on set-up instructions in manual,
called HP Service number provided. After ultimately finding the appropriate tech service person, he prescribed various diagnostics to get machine operative. All failed. He informed me that it was defective.
HP refused to replace the new machine that was bought. HP said the only remedy was to return the defective new machine to them at customer's own expense. And that HP would only replace it with a used refurbish machine. Service people were rude and continually placed customer on hold. Poor product, poor service.
Rating: 
-
good for the $$; some frustrating features
[...]
I found the machine somewhat difficult to set up & program in all the settings, my phone #, etc., that I needed to do; but probably no more difficult than other fax machines. And a major frustration: when you have it set to "auto", so it can switch between phone & fax, if you answer a phone call from a different phone, this keeps ringing & ringing thru-out the whole length of the phone call (???)--incredibly annoying.
But as I use it only occasionally, I just keep it unplugged until I need to use it. And for the $$, & esp. since it uses ink cartridges unstead of one of those awful film rolls like on my 5 y.o Sharp, it's probably a pretty good buy.
