A modern voice communication SIP protocol is widely used to make calls in the Internet. However, the final subscriber is mostly interested not in the very SIP standard but in the SIP telephony conception based on it.
One one hand, all traditional conveniences for making telephone calls, compatibility with the international subscription base and the procedure of dialing numbers are kept.
Whoch Software & Technologies Ltd
we are selling a cheap and low rate interntional card, users can achieve phone to pc function and free calls ,welcome to contact us.
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