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.
3CX, Asterisk, Elastix, and Trixbox PBX Hosting. CAT-5 Data Center, Active NAT Assistanceā¢, Fully Managed Cisco Network, Cloud Platform. No hardware or software to purchase or maintain. 24/7/365 Support.