E1 Bulk Wholeseller – a company, which sells E1 digital transmitting products in large
quantities. Some companies after selling their E1 products provide complete technical
maintenance and support.
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.