https://community.bt.com/t5/Home-phone-including-Digital/8600/m-p/2283316#M88500 <P>Is caller ID still active on the line? If you disable the Call Control &amp; call from your mobile, is the number displayed? There have been a few reports over time of the facility dropping off a line.</P><P>If CLI is working as it should then you may have to bite the bullet &amp; reset the base station. Unfortunately that will likely wipe your contacts &amp; blocked lists.</P> Thu, 16 Mar 2023 12:51:23 GMT Anonymous 2023-03-16T12:51:23Z https://community.bt.com/t5/Home-phone-including-Digital/8600/m-p/2283311#M88499 <P>We have a 8600 quad system which has suddenly started to block genuine callers.&nbsp; Anyone else had this problem?&nbsp; Also both incoming and outgoing sound level has dropped?</P> Thu, 16 Mar 2023 12:36:55 GMT https://community.bt.com/t5/Home-phone-including-Digital/8600/m-p/2283311#M88499 Consettonian 2023-03-16T12:36:55Z https://community.bt.com/t5/Home-phone-including-Digital/8600/m-p/2283316#M88500 <P>Is caller ID still active on the line? If you disable the Call Control &amp; call from your mobile, is the number displayed? There have been a few reports over time of the facility dropping off a line.</P><P>If CLI is working as it should then you may have to bite the bullet &amp; reset the base station. Unfortunately that will likely wipe your contacts &amp; blocked lists.</P> Thu, 16 Mar 2023 12:51:23 GMT https://community.bt.com/t5/Home-phone-including-Digital/8600/m-p/2283316#M88500 Anonymous 2023-03-16T12:51:23Z