Digium Wildcard TE407P card has a built-in hardware echo cancellation, based on a powerful digital signal processor. Board supports E1, T1 and J1 interfaces, which can be configured for each interface or the entire board as a whole.
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Pricing Starting at:
$ 99.99 a port
$ 1.99 a phone number
$ 0.99 per inbound voice circuit from the carrier