Wildcard TDM410

Digium Wildcard TDM410 is a half-length PCI 2.2 compatible card that supports FXS and FXO interfaces for connecting analog telephones and lines through a PC, it was developed as a replacement for TDM400P. By using IP-PBX Asterisk Open Source software and a standard PC, the user of Digium Wildcard TDM410 could build a small office telephone system, which will have all of the sophisticated and useful features of modern telecommunications equipment for big business.

Digium Wildcard TDM410 card makes a cost of VoIP-telephony very low. Using X100M and S110M modules with TDM410 card, you can build a solution supporting various phone ports. And in order to scale this solution, you simply have to add additional TDM410P cards with full sets of modules.
Unlike the previous Digium TDM400P card, the new card allows installation of echo cancellation module VPMADT032, which reduces the load on the telephony server and improves the sound quality compared to the software algorithms.
In order to use FXS modules, you have to have a free 12V connector from the server’s power supply block. But it is not required for the operation of FXO modules.

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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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