DrayTek Vigor2930Vn new series routers have two separate WAN ports for connection to Internet service providers through Ethernet with load balancing on interfaces and redundant communication. This solution is often necessary for connection of any office to two different providers to organize a permanent access to the Internet.
Citel PBXgateways are installed at the central PBX location, and EXTenders are deployed at branch offices, call centers, or at home offices over managed IP connections, DSL, cable, or analog circuits