An IT consulting company has published a case study about installing a Linux-based VoIP (voice-over-IP) system at a bank with two satellite offices. The setup saves $2,600 of recurring monthly charges over a system based on leased lines, the company says.

The company (Softwink) used asterisk PBX software in conjunction with Digium network cards, whitebox PCs running Slackware Linux, and SIP-compatible (session initiation protocol) 2- and 6-line phones from Cisco. The company also used OpenVPN to ensure privacy and security, along with GSM (global system for mobile) compressions. A POTS (plain old telephone service) phone was also installed at each office for 911 service in the event of power failure.

Read Softwink's Linux VoIP case study

 
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