[asterisk-users] First Time T1 Questions

[Deepak Naidu]

We switched to T1(PRI) for high bandwidth & voice quality, echo 

I am using TE212P(which is a dual span Echo Chancellor & hardware DTMF).  I have only one PRI connection from PSTN, but I implemented this 6 months agao when there were no single span cards.

Sangoma just came with one in April, but I didnt wanted to go with that bcos I havent seen review that the drivers are old but the card is great.

Now when I have a nice setup of PRI with 95 SIP extension to Asterisk.  I recently got A101D(which has Echo cancellor & hardware DTMF) for my standby asterisk.

Bot of these with their current drivers work great for Echo & Voice Quality.  But my system(config) had a big issue with DTMF detection, which means when someone calls main line & then trys to punch my extension(123) the asterisk think its 112 & dials that person or a wrong # like 111 which is not an extension.  SO I had to resolvbe this with Digium by enabling hardware DTMF 6 months ago from software DTMF(I am not sure wthere this was asterisk issue of DTMF, anyways I enabled hardware DTMF in Digium card & it worked fine.

But now the new Sangoma card which I bough for backup didnt have the drivers compatible to enabled the hardware DTMF.  SO had songoma give me a custom drive for their hardwrae DTMF & they did within 20-25 days & it works.

But you wouldnt find that driver sin Sangoma site, bcos they are still working on them(for me they fixed for my model-- A101D)

So in my view both are great unless they work.  Atleast I have been using Digium TE212P for 6 months.

Also note your Network & QoS is also important, we have seperate switches to avoid QoS it depends uto organisation wish & funding.

Also the type of Desktop VoIP phones you have.

I think I have said lot, let me know if this was helpful or I was just barking ... ha ha ha...

--
Deepak




"Michael J. Liberatore" <mike240se at straightandnarrowinc.org> wrote:     Hi all, i have been  using asterisk for a few years but i am about to do my first t1 setup.   After terrible quality issues between two business locations, we have decided to  purchase a point to point t1 from the local phone co.  The internet is too  crappy, too much lag, queing and jitter.  Most calls were  dropped.
  
 I was about to order  two cisco routers with csu cards and remembered our wonderful asterisk supports  direct t1.  I remembered digium and sangoma both make these  cards.
  
 After some problems  with a digium fxo card, i just ordered a sangoma a200 with echo  cancellation.  I was also leaning towards getting the single t1 sangoma  card that is $499 from voip supply.  But i know digium also makes  one.  I was wondering if the digium card works better or much easier with  asterisk?  The digium description says you can split the t1 for voice and  data which sounds nice since i will only be using probably 4 channels max of the  t1.  Does the sangoma card also do this?  I noticed the sangoma card  has a 5 year warranty which is nice since i have had multiple digium fxo cards  die.  Is there any other reason to get or the other?   
  
 Thank you all for  your help.  I am hoping this opens up a whole new world in asterisk for  me.
  
 -Mike
  
  
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