SIP soft phone for Linux offered as free download

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Jan. 20, 2004

Zultys Technologies has released a free soft-phone that runs on Linux and provides many of the features of the company's embedded-Linux-based Zip 4x4 SIP phone, without requiring a separate handset. The Lipz4 (short for "Linux IP Zip 4x4") soft phone is compatible with "any IP telephony system." Zultys hopes Lipz4 will lower the barriers for companies to explore VoIP technology (Voice over IP), and also serve the needs of some mobile professionals wishing to minimize device clutter.

The Lipz4 allows Linux users to make and receive phone calls from their computer, without the need for a telephone handset. Based on open standards, the Lipz4 is compatible with any IP telephony system using SIP (Session Initiation Protocol), according to Zultys. One such system is the Zultys MX1200, a 2U rack-mounted Linux device offering traditional PBX features along with an Internet gateway, switch, and router.

Lipz4 supports four call appearances, instant messaging, hold, transfer, forward, redial, and more. It can store the last 32 incoming and outgoing phone numbers, making them easily accessible for immediate redial.

"The phone can be set to ring in multiple locations," notes Patric Ferriter, VP of product marketing at Zultys. "If you're on the phone, you can still be reached by instant messenger, for instance, if a more urgent call arrives."

The Lipz4 has additional features which are available by purchasing an inexpensive license from Zultys. These features include conferencing, do not disturb, AES encryption, compression (G.729), and the ability to specify a backup server.

The Lipz4 soft phone, along with a 194-page User Manual, can be downloaded from Zultys's "Lipz4" Web site. The site also hosts interoperability information, FAQs, a datasheet, and, soon, a user discussion board.

"Lipz4 will enable Linux users to explore many of the features of IP telephony," said Patrick Ferriter, VP of product marketing at Zultys.

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