SJphone

SJphone is a softphone which allows you to speak over Internet using any desktops, notebooks, PDAs, stand-alone IP phones, and even any traditional landline or mobile phones.
It supports both SIP and H.323 industry open standards and is fully interoperable with most major Internet Telephony Service Providers (ITSP) and software and hardware manufacturers.

Web site: http://www.sjlabs.com

There are free and paid versions of SJphone.
Development may have ceased — last new release was in 2007.

Operating systems supported:

• Microsoft Windows XP, 2000, 98/ME
• Linux
• Mac OS X
• Windows CE or Pocket PC 2002/2003

Protocols:

• SIP
• H.323

To configure SJphone for Free World Dialup you can either download SJphone and ITSP package and choose the profile from tray menu or download the application below.

Download
download

A configuration guide to use sjphone with asterisk can be found here


VOIP phones