fxs card fxo card e1 card t1 card

 

fxs
-
-
-
-
-
-
-
-
-
-
fxs
-
-
-
-
-
-
-
-
-
fxo
-
-
-
-
fxo
-
-
-
-
t1
e1 GSM Card

buy online

 

 

Echo Cancellation Module :
VPMOCT128 (EC)

fxo card
photo of voip ata Photo
faq of sip ata Buy Now

Echo Cancellation Module VPMOCT128

It is for TE420 , TE405P , TE420P , TE220 , TE220P.
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.
However, there are cases in which these algorithms are not effective. To combat this, introduced DSP-based echo cancellation modules for our multi-port T1/E1/J1 cards and our 24-port analog card.

Now, it is pleased to make available the VPMOCT128 echo cancellation module. This module, which offers 128ms (1024 taps) of echo cancellation across all of its channels and provides the same toll-quality G.168 compliant echo cancellation found in HPEC software-based commercial echo canceller. The VPMOCT032 is immune from any system CPU spikes that might otherwise affect a software-based solution.

The VPMOCT128 provides a certified carrier-grade algorithm that has been labeled a benchmark for echo cancellation. VPMOCT128 enables users to eliminate echo tails up to 128ms or 1024 taps across all 128 channels in E1 mode or 96 channels in T1/J1 modes. Further, this module takes advantage of the Octasic Voice Quality Enhancement to provide superior sound quality on all calls.


[root@bogon`]# dmesg|grep VPM

VPM450: echo cancellation for 128 channels
VPM450: hardware DTMF disabled.
VPM450: Present and operational servicing 4 span(s)

 

fxo card .. Bookmark .... fxo card .. Top .... fxo card .. Print



 
 
 
 
 
 
TDM800P | AEX410 | AEX800 | TE110P | TE405P | TE420P | TE420 | PBX04 | IP PBX kit | Buy Online
VoIP FAQ | VoIP Article | News and Events | Friendlink | Index