PortSIP Free SIP Softphone is a fully functioning softphone featuring many of the popular features. With your existing connection to a VOIP or broadband service (e.g. Vonage, BT, AT&T) or an IP-PBX connection (e.g. Asterisk, enterprise LAN), it allows you to make calls to any softphone, mobile or landline number.

These samples were built based on the evaluation PortSIP VOIP SDK, which allows only two minutes conversation. The conversation will be cut off automatically after two minutes, then you can't hearing anything.

  View PortSIP VOIP SDK license agreement