Zoiper 3.15 Download [exclusive] | Premium Quality

Consider using (no cost, updated codecs, modern UI) unless you specifically require a 3.x feature removed in later versions.

Zoiper is a cross-platform VoIP (Voice over IP) softphone application used for audio and video calls, instant messaging, and fax over the internet. It is widely used by call centers, businesses, and individuals to connect with SIP (Session Initiation Protocol) and IAX (Inter-Asterisk Exchange) servers.