| Zap | PhoneTray Free | xtelsio TAPI for Asterisk | |
| 4.1 | 3.0 | 1.1.057 | |
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Users´ rating |
| Trialware | Shareware | Shareware | Licence |
| FREE | $29.99 | $27.00 | Price |
| 0.34 MB | 12.43 MB | 1.03 MB | File size |
| Feb 25, 2010 | Feb 8, 2013 | Feb 10, 2010 | Update |
| 31 | 20 | 19 | Downloads |
| Windows XP, Windows Vista, Windows 7 | Windows 7 x32, Windows 7 x64, WinServer, Windows Vista, Windows Vista x64, Windows XP | Windows XP, Windows 2000, Windows 2003, Windows Vista, Windows Vista x64, Windows Vista | OS |
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