go to this link:
If you get no luck with the manual. Just switch the power off the base unit for about 5 mins. Then switch it on again.
http://bt.custhelp.com/cgi-bin/bt.cfg/php/enduser/cci/bt_adp.php?p_sid=PEwQ49Nj&cat_lvl1=1243&cat_lvl2=1899&cat_lvl3=1919&p_cv=3.1919&p_cats=1243,1899,1919&p_faqid=12376
Abdul
November 2009