23. To adjust the phone number format, use the Review 3 or 4 button For instance,a 7-digit local number sometimes cannot be dialed because it requires a 10-digit or11-digit format. Use the Review 3 or 4 button to scroll through 7, 10, and 11-digitnumbers.7-digits: 7-digit telephone number (i.e. 555-5555)10-digits: 3-digit area code + 7-digit telephone number (i.e. 425-555-5555)11-digits: long distance code 1 + 3-digit area code + 7-digit telephone number(i.e. 1-425-555-5555)4. To dial the displayed number, pick up the handset or press Dial again.Call Waiting Caller IDThis feature lets you see (in the display) who is calling when you are on the phone andhear the call waiting tone in the receiver. The caller identification information appears inthe display after you hear the tone.IMPORTANT: In order to use this unit, you must subscribe to either the standard Name/Number CallerID Service or Caller ID with Call Waiting Service. To know who is calling while you are on the phone, youmust subscribe to Caller ID with Call Waiting Service.Caller ID