Mixed review - would not recommend

Bought this application on Feb. 12. to use with my corporate SIP based phone system. Application works when Im in the office, but does not work if I VPN from my home office. Also does not work via my offices SIP firewall from Ingate. In both situations I can establish SIP registration, but I cannot hear the audio of people I have called or have called me.

Fring has worked for me in the office, at home over VPN, and though our Ingate SIP firewall. Since the software being reviewed only seems to work correctly while Im directly connected in the office it provides little benefit to me over the freely available Fring.

JVB2112 about iSip -VOIP Sip Phone