Samsung SHT-8610 User Manual page 37

Using the extension phone
※ This function is available only in the extension phone that is connected to the system.
1
Pick up the phone and check the
dial tone.
4
If the counter part answers
the phone, start talking.
2
Press "9".
5
To end the call, place the handset
down.
3
Enter the phone number by using
the numeric buttons.
35