forgot this one I found..
The trick is really if you can telnet into the xr700. The Telnet Enable line in the debug page http://routerlogin.net/debug.htm
was not there in ver 38, 36, 34 FW. But luckily I found it in 1.0.1.20.
Downgrade your FW under Firmware Upgrade in http://routerlogin.net/adv_index.htm if Duma OS doesn’t take you there.
Use your Windows command line to telnet into the Linux OS of the router.