This is a H323 SoftPhone with next features:- PC to PC, PC to PSTN-phones, PSTN-phones to PC calling.- Instant messaging.- Audio-conferencing (additional equipment required).- Call transferring, Call forwarding,Call holding.Call intrude.- Call recording (for some codecs).- Speakerphone.- Work with USB-phones.

The license of this software is Freeware, you can free download and free use this internet phone software.