I just installed & configured a new Technicolor TG582n - it has a USB port that accepts a printer, a FAT32-formatted drive, or a cellular dongle, but no manual telling you how to actually do any of that. I only have a laptop & am using the wireless so I wanted to use it to share a USB printer on my network so I didnt have to bring the laptop into the study to physically plug the printer every time I wanted to print  - it took me quite a while to find the instructions:

See beusergroup.co.uk/technotes/index.php?title=Printer_sharing

These are for the older TG587n but worked a treat. 
Note you may have to turn telnet on if running win7 - control panel, programs & features, turn windows features on/off, tick Telnet client.

p.s. I also added a new user & pwd, removing the default Administrator with its blank pwd. Seemed safer!