AASTRA 610d for Aastra 400 User Manual EN - Manual (Page 21)

Using the display and operating elements
eud-1290/1.0 – R1.0 – 01.2011
21
Keys
Using the softkey
The 3 softkeys have variable functions. These functions are displayed above the key.
You can also store phone numbers on a softkey (see Chapter "Store a phone number
under a key – number key" , page 84 ).
Press the softkey where the display shows the function you want.
Keep the softkey held down for a moment (about 2 seconds).