@Will68 

Hi,

Perhaps the support misunderstood and assumed you need help in setting up the Internet connection on the TP-Link router.

As for the TalkTalk's Digital Voice service. Apparently the situation is the same as with BT's Digital Voice service, in that it is propriatary and will only work with the ISP-provided equipment, in case of TalkTalk that's their "Wi-Fi Hubs" and "Digital Voice Adapter".

  @woozle Support understands that the router connects to the internet, but you're right, it seems VoIP will only work with their equipment. Or, they're just not willing to give out their telephony connection parameters. In my case I have the WiFi Hub 2, this has a phone port so no need for the digital voice adapter. Since the latest firmware update something has broken in the Hub 2, it won't save settings when switched off, hence the reason for purchasing a new router. 

Ah well, I have a backup router in case it completely dies. I know I can use a different VoIP provider, but for the time being I don't really want to pay for two separate VoIP services. Shame really because I do like the Archer. I really wasn't expecting it to be so difficult to connect a phone, especially as it connects to the internet with no problems. Cheers anyway.

Thanks for the link Joseph, but unfortunately TT refuse to provide that information.