X is a softphone with a Computer Telephony Integration - CTI tool for Asterisk and third party application. API is based on .INI files, through which one can integrate IP telephony to any CRM / ERP software. FEATURES * SIP Proxy authentication. * Dial/Receive phone calls directly from your contact center application. * Line Hold. * Acoustic echo cancellation or suppression. * Noise cancellation or suppression. * AGC (Auto Gain Controller). * Friendly to NAT and other firewalls. * Keep-alive packets to NAT/firewall. * Packet Loss Concealment. * DTMF tones generation. * Mic & Speaker Volume. * Works with all kind of Internet connections - at least 30 kB/s.