Digium 1VPMOCT256LF 256 Channel Echo Cancellation Module
Digium 1VPMOCT256LF 256 Channel Echo Cancellation Module
The Digium 1VPMOCT256LF is a 256 channel echo cancellation module. For Asterisk users who connect to the PSTN, the most common type of echo is hybrid echo - the echo introduced by the impedance mismatch between 2-wire and 4-wire telephone circuits. The echo manifests as a distorted and delayed reflection of the users voice while in conversation with an external party through the PSTN. Asterisk itself offers a range of software-based open source echo cancellation routines that are moderately effective in eliminating the hybrid mismatch echo that most Asterisk users experience.
Digium 1VPMOCT256LF 256 Channel Echo Cancellation Module
The Digium 1VPMOCT256LF is a 256 channel echo cancellation module. For Asterisk users who connect to the PSTN, the most common type of echo is hybrid echo - the echo introduced by the impedance mismatch between 2-wire and 4-wire telephone circuits. The echo manifests as a distorted and delayed reflection of the users voice while in conversation with an external party through the PSTN. Asterisk itself offers a range of software-based open source echo cancellation routines that are moderately effective in eliminating the hybrid mismatch echo that most Asterisk users experience.