This is the list of recommended softphones that we have. All of the following sip phones have been tested by our testing team to work with the dialler and are currently in use on customer sites.
bria:
https://www.counterpath.com/bria/
pros:
can configure multiple sip accounts
good technical support
easy to set up
cons:
cost
zoiper:
pros:
easy to set up
good technical support
cons:
lots of features locked for PRO paid version such as transfer calls.
can configure multiple sip accounts PRO version only
linphone:
pros:
can configure multiple sip accounts
open source
supports many platforms(windws, OS X, linux, android and IOS)
cons:
can be tricky to set up
some issue with usb sound cards