Hardware echo cancellation is not just about reducing load on the CPU, it is also about the quality of the echo cancellation.
The software echo canceller that comes with asterisk is not able to handle all kinds of echo, so the risk of echo increases. The hardware echo cans can handle much more complex echo problems, and they don't need any time to "train" before they start doing their job. The question that needs to be answered centres around what your customers' tolerance will be for echo problems. Is is worth a few hundred dollars to ensure that it is not an issue? Keep in mind that a day of labour wasted trying to figure it out in software is going to cost more than the hardware solution. What I'm trying to get at is don't just look at the sticker price. A good echo can is a bit of insurance. Jim > -----Original Message----- > From: Henry L.Coleman [mailto:[EMAIL PROTECTED] > Sent: August 8, 2007 3:08 PM > To: [email protected] > Subject: [on-asterisk] T1 with Echo/No Echo > > 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. > > > -- > Henry L. Coleman. > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.476 / Virus Database: 269.11.8/941 - Release > Date: 07/08/2007 4:06 PM > > No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.476 / Virus Database: 269.11.8/941 - Release Date: 07/08/2007 4:06 PM --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
