5.6. Setting Up Softphones
Problem
You're ready to connect some software telephones and do some real IP telephony in your test lab, using Windows and Linux PCs. Where do you find some good softphones, and how do you set them up?
Solution
There are many softphones you can try. This recipe uses the Twinkle softphone for Linux, and the X-Lite softphone for Windows. Both are free of cost. Twinkle is open source, X-Lite is not. Twinkle runs on Linux only, while X-Lite runs on Windows, Linux, and Mac OS X.
Twinkle has a good feature set, a nice easy-on-the-eyes interface, is easy to use, and has good documentation. X-Lite is a bit squinty to read and rather convoluted to configure. But it is very configurable, sound quality is good, and it has volume controls right on the main interface.
You will need the user's login name and password from /etc/asterisk/sip. Conf, and the IP address of the Asterisk server, as Figure 5-1 for Twinkle shows.
You'll find this screen in Edit → User Profile. When you change settings in Twinkle, hit Registration → Register to activate the new settings.

Figure 5-1. Twinkle configuration
In X-Lite, go to the Main Menu → System Settings → SIP Proxy → Default, like Figure 5-2.

Figure 5-2. X-Lite configuration
Be sure to set Enabled:Yes.
Close X-Lite, then reopen it to activate ...
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