What are the differences between using I-Phone and ITG?
Most people use “I-Phone” to refer to a PC-to-PC-type Internet telephone system, which is composed of a PC equipped with a voice processing card, a microphone, a speaker, and a phone-connection software. Each I-Phone user is required to log in his Internet account before using I-Phone to make calls. The ITG is designed for both PC-to-Phone and Phone-to-Phone users, which accept calls from PC clients and ordinary phones.
