Voice over IP technologies allow telephone calls to be made over an IP network such as the internet instead of the ordinary PSTN system. Calls can traverse the Internet, or a private IP Network such as that of a company. The phones use control protocols such as Session Initiation Protocol. Ordinary PSTN phones are used as IP phones with analog telephony adapters (ATA).
Grandstream Networks, USA, is the leading manufacturer of IP voice/video telephony and video surveillance solutions. Grandstream serves the small-to-medium business and consumer markets with innovative products that lower communication costs, increase security protection, and enhance productivity. The open standard SIP-based products including SIP based IP Cameras offer broad industry interoperability, unrivaled features, flexibility, and price-performance competitiveness.
DISCLAIMER : Design & Specifications of the products are subject to change