Siemens 600 Series - Manual (Page 79)

Making Calls 3–15
3. Making
C
alls
To answer a DSS
extension ➩ Press the DSS (D-) key for that extension.
To answer another extension for which you do
not have a DSS key, you can use the Station
Pickup feature. (See “Station Pickup” on page
4–10.)
To answer a DSS
extension during
a call ➩ Ask the first party to hold.
➩ Press the DSS (D-) key for that extension.