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Subscribe Policy
Your subscribe policy determines whether your presence or absence can be tracked
by others.
To call any contact from the address book, select this contact with the mouse, click
Select to make the address appear in the address field of the main window, and start
the call with Call or Answer as usual.
8.6 Troubleshooting
I try to call someone, but fail to establish a connection.
There are several reasons why a call could fail:
Your connection to the Internet is broken.
Because Liphone uses the Internet to relay your calls, make sure that your
computer is properly connected to and configured for the Internet. This can
easily be tested by trying to view a Web page using your browser. If the Internet
connection works, the other party might not be reachable.
The person you are calling is not reachable.
If the other party refused your call, you would not be connected. If Linphone
is not running on the other party's machine while you are calling, you will not
be connected. If the other party's Internet connection is broken, you cannot
make the connection.
My call seems to connect, but I cannot hear anything.
First, make sure that your sound device is properly configured. Do this by launching
any other application using sound output, such as a media player. Make sure that
Linphone has sufficient permissions to open this device. Close all other programs
using the sound device to avoid resource conflicts.
If the above checks were successful, but you still fail to hear anything, raise the
recording and playback levels under the Sound tab.
The voice output on both ends sounds strangely clipped.
Try to adjust the jitter buffer using RTP properties in Preferences → Network to
compensate for delayed voice packages. When doing this, be aware that it increases
the latency.
Using Voice over IP
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