ERROR 633 : In device manager The USB lan may be disabled/enable the USB lan

ERROR 645 or 734: Select dialer icon, right click, select property, select security, in security option select "ALLOW UNSECURED PASSWORD"

ERROR 650 or 721 : check the VPI as well as VCI value for the dailer

ERROR 651 : No dialtone or No link

ERROR 678 or 769 : 1. If Lan card is disabled 2. If modem in pppoe mode 3. If Issue with LAN card drivers (try disable & enable LAN)

ERROR 691 : Issue With Uerr Id and Password

ERROR 718 : Check User ID and Password, unlpug and replug the modem, Disable and Enable the Lan card. Restart the PC

ERROR 735 : Check if any IP address is assigned in the Dailer if assigned change it to obtain IP automatically mode