MFC-990CW FAQs & Troubleshooting MFC-990CW Not your product? Sort by: Updated Date Popularity 2 Results 1. 28/11/2008 I cannot register an optional cordless handset. 2. 30/10/2008 How do I clear the message "Searching for Base Unit (Base Unit not detected)"? More FAQs Telephone FAQs & Troubleshooting