You may refer to this link to set up your internet: http://www.tp-link.com.au/faq-541.html

As I know, the special characters is not supported for PPP username and password. You may check whether your internet service provider can change the username and password on their side to be numbers...

For the Annex B, if you are using Annex B line and the VR400 don't work on your line, you may send an email to TP-Link Tech Support (support.uk@tp-link.com) to let them check it out for you. For the...

The only thing I've seen is under Advanced-->Telephony-->Telephone numbers. But I think it may not do what you want.

If your connection is like that: ISP-----(telephone line)--- TD-W9970---(ethernet cable)---Sonicwall and the ISP provides internet with static IP, not PPPOE or PPPOA(which needs an username and...

Haven't heard about similar issues. Do you have special settings, like MAC filtering, Access control on your main router? Would the smart phones work well when they are connected to the router's...