BT6500 base not ringing

SOURCE: How do i extend the rings before the answer machine cuts in on my BT6500

Set the answer delay
1. Select Menu, Answer Phone is displayed, press
Select.
2. Press (Calls) until Settings is displayed, press Select.
3.Press (Calls) to highlight either Ans. & record or
Answer only and press Select.
4. Answer delay is displayed, use < or > to display
the number of rings you want (0-9 rings or Time
saver) and select Save. Saved will be displayed.
Set the maximum message length
You can set the maximum length that an answer
machine message can be: 1 minute, 2 minutes or 3
minutes. The default setting is 3 minutes.
1. Select Menu, Answer Phone is displayed, press
Select.
2. Press (Calls) until Settings is displayed, press Select.
3. Press (Calls) to highlight Ans. & record and press
Select.
4. Press (Calls) to display Max. msg length and then
press < or > to select the length you want and
select Save. Saved will be displayed.

Billy from Hayward

It is in the owners handbook page 45 get it while the link last
http://www.shop.bt.com/content/uni2/documentation/8h3h/bt6500_user_guide.pdf