There is also the alternate of buying an external t1 gateway.
On Wed, 2007-08-08 at 15:00 -0500, John Lange wrote: > I would sum it up this way; never _EVER_ do an Asterisk install at a > client site without hardware echo cancel. End of story. > > Even when the software echo cancel in Asterisk is working at its best, > it does not come close to meeting the ITU g168 standard. > > Put another way, if you don't use a hardware echo canceler with > Asterisk, I guarantee you will get the comment "I'm getting echo on some > calls." > > By the way, I should qualify the above statement by saying there now is > a high performance software echo canceler available for asterisk which > is g168 compliant. In fact, my understanding is it is the same code used > inside the hardware echo canceler and so it should produce the same > result assuming you have enough CPU. > > http://www.digium.com/en/products/software/hpec.php > > But note; it is not available for the T1 cards for the simple reason > that it is so CPU intensive that the maximum number of channels current > CPUs can support is about 8. > > John > > On Wed, 2007-08-08 at 15:08 -0400, Henry L.Coleman wrote: > > Hi all, I have a client who is getting a T1 from Bell. As I don't have any > > experience in the quality of various vendors PCI cards and if echo > > cancellation is really required I am looking for some real life experience > > on these products. I have heard good things about Sangoma so I will > > probably go with them, but the echo card is twice the price of the > > standard T1 card and as the client is not flush with money I would prefer > > to use the least expensive option. I understand that the echo cancellation > > is under software control but how much overhead does this really add to > > the system ? If anyone out there is using the A101 card I would grateful > > if they could let me know if there are any quality issues with this card. > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
