ToolBox -

Speedtouch 716WL ADSL Router

Dial 9, wait for the dial tone
Dial the number as normal

Speedtouch 780WL ADSL Router

Dial *01*, wait for the dial tone
Dial the number as normal

Wi-Manx ATA (with PSTN Lifeline)

Press the button on the unit, it should then click over to PSTN (The LED should be illuminated)