DrayTek Vigor2930Vn

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.

In this case, one of the providers (e.g. with more favorable prices) can be used as a primary, and during the failure of the provider’s network, office can automatically switch to another provider.
Also, by using a load balancing you can direct e-mail traffic through one provider, and transfer files via FTP, provide Internet for staff, and use VPN data channels through another Internet provider.
This router has wide opportunities for QoS support, multi Firewall using WEB / URL - Content filters, bandwidth management for clients in the LAN network, the ability to block P2P and IM services make this series of routers, ones of the best for placing in SOHO / SMB solutions when connecting to the Internet network from offices, banks and other enterprises'.

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Echo cancellation module VPMADT032

VPMADT032 echo cancellation module is meant to be used with the Digium IP telephony boards; it provides echo cancellation for configurable long "tail" of up to 128 ms (1024 samples) simultaneously for all ports of the board. All IP-PBX Asterisk servers, connected to the telephone network (PSTN) have one common problem, which is "hybrid echo" - echo obtained due to the difference in the load-wire and four-wire telephone circuits. Echo appears as a distorted reflection and a detainee of the caller's voice, who is subscribed to IP-PBX Asterisk while talking to PSTN subscribers.

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