Even as a legacy version, Zoiper 3.7 provides a robust toolkit for professional communication:
: Includes a-law, u-law, GSM, iLBC, and Speex Narrow. Note that the G.729 codec typically requires a separate paid license. Zoiper 3.7 Download
: Call recording, conferencing, transfer, and "Presence" (checking if coworkers are online) are available, primarily in the Pro/Biz versions. How to Download Zoiper 3.7 Even as a legacy version, Zoiper 3