Farewell, and Thank You.

We thank the Apple community for 25 years of incredible support, collaboration, and loyalty.
It has been an honor to serve you, and together, we have achieved remarkable things.
As this product reaches its end of life, we look back with gratitude and pride.
It has been an incredible journey, filled with innovation and unforgettable moments we shared.

While the site may be going out of service, the impact and memories we have created will last for ever.

What's new in iSoftPhone 4?


New SIP module:

  • STUN and DNS compatibility increased
  • SRTP - compatibility with third party clients (v.3 SRTP worked only in iSP-to-iSP model)
  • security: TLS - major bug fix
  • SIP servers compatibility increased
  • DTMF signalling - major bug fix

New Audio module:

  • Voice delay significantly reduced
  • Voice quality improved
  • Noise reduction more effective
  • Call transfer - reliability improved
  • Audio call conference - voice quality improved, required bandwidth reduced

Calls recording:

  • Implemented from scratch in version 4
  • Build-in PCM-WAV high quality converter (version 3 had used external script to convert sound)
  • Call recording window redesigned for ease of use

GUI lifting:

  • The interface has beed redesigned to comply with the newest OS X
  • More intuitive navigation
  • Address Book - compatibility with El Capitan Contacts
  • New fonts and graphics
  • Application icon redesigned

Compatibility with OS X El Capitan



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