how to make VOIP calls
1. VOIP calls with a softphone
configuring CardBook
CardBook prefs > communicate >
With these settings, CardBook is configured to make SIP calls by right-clicking on a telephone number, which calls the SIP protocol.
The SIP call must be handled by a Softphone configured to "listen" to the SIP protocol. This external application catches/receives the telephone number from CardBook via the SIP protocol and passes it along to a VOIP service.
Example:
configuring Linphone in Linux
[Desktop Entry]
Version=1.0
Exec=/usr/bin/linphone -c <%u@your_server_sip>
Type=Application
MimeType=x-scheme-handler/sip
Name=sip handler
Hidden=true(source: https://blog.xlinfo.fr/thunderbird/)
2. VOIP calls with Jitsi
configuring CardBook
CardBook prefs > communicate >
