AASTRA DT690 - Manual (Page 42)

C ORDLESS P HONE FOR MX-ONE™
42 1424-EN/LZT103 088 Uen F5 2012-03-14
Note: If you want to restore parallel ringing for all phones defined in the
list, follow the procedure for restoring the function from the phone
with the main extension number and enter the number of the
answering position. If you want to restore parallel ringing for one
specific phone in the list only, follow the procedure for restoring
the function from this phone and enter its extension number.