Question 1

compatible with windows 8.1?

Accepted Answer

Yes, according to Microsoft this product is Windows 8.1, but NOT Windows RT 8.1.

Microsoft Compatibility Page:
According the instructions on this reply page, I cannot put a link to the compatibility center.  if you do a search for "windows compatibility center" it will take you to a page where you can put in the manufacture model number "USR5638" and you can verify.

Question 2

Will work with windows 10?

Accepted Answer

In order for this Faxmodem to work with Win 10 you would have to contact the manufacturer and see if they have a driver for win 10. I used this item with Server 2003 and it worked ok. There is no demand for faxmodems any more so the manufacture is not going to spend on drivers.

Question 3

Is this modem compatible with Windows Server 2008r2 64 bit ?

Accepted Answer

The USR website says that it is. they provide a 64 bit driver for it and list as being compatible with 2008.

Question 4

can this modem originate a 56k handshake, or only recieve one?  That is to say, if i use this modem to connect to another moem, will it be at 56k or 3350?

Accepted Answer

I cannot give you the correct definative answer.  However, this MODEM will negotiate with it's counterpart and negotiate the highest rate possible between the two endpoints.

Question 5

does this work with a mac?

Accepted Answer

If the mac has a pci express slot I would think it would. Contact U. S. Robotics to be sure

Brand	U.S. Robotics
Model	USR5638

Type	Dial-Up Modem
Interface	PCI Express
Cable Interface	RJ11 port
Standards	Data: V.92, V.90, V.34, V.32bis, V.32 Data Error Control/Compression: V.44/V.42/V42bis and MNP5 Fax: EIA 578 (Class 1) with V.17, V.29, V.27ter, V.21, Group 3 V.80 video conferencing support
Max Transmission Rate	56Kbps

Meet Your Seller

U.S. Robotics USR5638 V.92 Faxmodem 56Kbps PCI Express

Learn more about the US Robotics USR5638

Customer Reviews of the US Robotics USR5638

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info

Item#: 9SIAFJ86WT6801