After the widespread adoption of cell phones in the 2000s, softphones have become the next big step forward in telecommunications technology. Softphones allow users to make and receive calls via cell ...

In our test of two Session Initiation Protocol-based freeware softphone options — PortSIP and Phoner — we required them to register and place calls via both freeware Asterisk 1.2 and Zultys MX 250 ...