After Ekiga is properly configured, making a call is easy.
Switch to the Dialpad mode.
Enter the SIP address of the party to call at the bottom of the window. The address should look like:
for direct local calls: sip:username@domainname or username@hostname
sip:username@domainname or userid@sipserver
Click Call or press Ctrl–O and wait for the other party to pick up the phone.
To end the call, click Hang up or press Esc.
If you need to tweak the sound parameters, click Edit › Preferences.