Z-Com TG2521

Flashing DD-WRT
v.24 SP2 - build 13839 - 20100204

USB Info
 USB Mass Storage erro T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 1 B: Alloc= 0/800 us ( 0%), #Int= 0, #Iso= 0 D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1 P: Vendor=1d6b ProdID=0002 Rev= 2.06 S: Manufacturer=Linux 2.6.34.7-svn15928 ehci_hcd S: Product=Atheros AR91xx built-in EHCI controller S: SerialNumber=platform C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=256ms

test with USB storage (USB pendrive 1G, 2G, 8G. HD 500GB) did not recognize. ERROR: (with several revisions dd-wrt) hub 1-0:1.0: unable to enumerate USB device on port 1