Sangoma or Digium ?

i would go with the 2port digium card (or higher) .. the OCTASIC chip works a lot better than the VPMADT032 chip. As far as echo can.. its worth every penny and then more. When every customer is complaining about echo from the far end and theres nothing you can do about it, you sometimes feel like shooting yourself. Keep in mind its not the T1 that has the echo, its the far-end hybrids that create the echo. So echo will depend on who you call. Places that have analog lines will generally have more echo than some number thats digitally connected.

Erik,

What is the difference in the 1 port Vs. the 2 port?

Does it not have the same Echo Can as the 1 port?

thx

Greg

Hi Greg,

Sorry to butt into your conversation. We've been using Digium cards since day X on customer prem that insisted on using ISDN for inbound calls.

We've recently built 2 PSTN gateways in our data centre and decided to use Sangoma PRI cards. First up the build quality of the card is really something. Just so solidly put together and so well built. The echo cancellation on the A102 is also amazing. I really like the wanrouter stack also. Works out of the box. Config is very easy.

They are also the smallest card in their class and will happily go into a 1U box.

Definitely worth considering...

Brian

Brief card vs card here: http://www.voipsupply.com/blog/digium-vs-sangoma-which-pci-cards-are-be…

Brian, Erik,

Thanks for the responses.

So would the Echo cancelation on the Sangoma work as well as the Octasic on the Digium?

Also, I notice on the Digium cards that they are still using (at least in the datasheet) the Zaptel driver.
This would not work in the newer version of Asterisk which needs DANDI.

Is this an issue with Digium?

thank you ,

Greg

digium cards use dahdi, digium is the company that WROTE dahdi and zaptel. Digium IS asterisk, so of course their cards are going to work out of the box :-). Unless you are experienced in compiling software, and specifically building Asterisk I would caution against sangoma. Sangoma cards are not support natively in dahdi or asteirsk. You have to merge source code into dahdi and recompile asterisk to support it. Thjis is something they call their Wanpipe drivers. IF you aren't adept at building asterisk and were to cook-book their procedure there is a good chance you would run the command that would wipe out all of your thirdlane configs.

Hi Greg,
Sorry for my late reply but keep in mind that even if you did not purchase card with hardware echo cancellation, the game is not over yet. You can still use software echo cancellation. There are several products that offer software echo cancellation. The PBXMate, for example, is an easy plug-and-play software echo cancellation.
Mike

software echo cancellation has limitations (software as in the cpu does the work, its all technically software).. its good for analog cards but if your running PRI I would hope your concurrent call volume was at least 12 consecutive calls. in the larger consecutive calls, software echo cancellation can really put more load onto the machine. I remember when the HPEC modules came out for dahdi/zaptel. At the time, 23 concurrent calls really pushed the cpu utilization to 80%. In a situation where you are running multiple PRI circuits and you need more 'taps' of echo cancellation, the cpu is going to choke. DSPs were designed for this sort of task and do it without breaking a sweat.