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Using Voice over IP
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Using Voice over IP
Linphone is a small Web phone application for your Linux desktop. It allows you to make two-party
calls over the Internet. There is no need for special hardware items: a standard workstation with a
properly configured sound card, microphone, and speakers or headphones is all you need to get
started with Linphone.
7.1 Configuring Linphone
Before you start using Linphone there are some basic decisions to make and some configuration
tasks to complete. First, determine and configure the run mode of Linphone, determine the
connection type to use, then start the Linphone configuration (
Go > Preferences ) to make the
necessary adjustments.
7.1.1 Determining the Run Mode of Linphone
Linphone can be run in two different modes, depending on the type of desktop you run and on its
configuration.
Normal Application
After the Linphone software has been installed, it can be started via the GNOME and KDE
application menus or via the command line. When Linphone is not running, incoming calls
cannot be received.
GNOME Panel Applet
Linphone can be added to the GNOME panel. Right-click an empty area in the panel, select
Add to Panel , and select Linphone. Linphone is then permanently added to the panel and
automatically started on login. As long as you do not receive any incoming calls, it runs in the
background. As soon as you get an incoming call, the main window opens and you can receive
the call. To open the main window to call someone, just click the applet icon.
7.1.2 Determining the Connection Type
There are several different ways to make a call in Linphone. How you make a call and how you
reach the other party is determined by the way you are connected to the network or the Internet.
Linphone uses the session initiation protocol (SIP) to establish a connection with a remote host. In
SIP, each party is identified by a SIP URL:
sip: username @ hostname
username is your login on your Linux machine and hostname the name of the computer you are
using. If you use a SIP provider, the URL would look like the following example:
sip: username @ sipserver
username is the username chosen when registering at a SIP server. sipserver is the address of the SIP
server or your SIP provider. For details on the registration procedure, refer to “Configuring the SIP