[Asterisk-Users] Quad T1 Card

[Rich Adamson]

Sean Cook wrote:
> Ok... I am reluctant to ask this question as I believe that it may be
> like asking what someones favorite linux distribution is... but I need
> to make an informed decision.
> 
> We are getting ready to upgrade from a TE210P to a quad T1 card with
> echo cancellation.  I am trying to decide between the Sangoma card and
> the Digium card.  I need this to have great quality and I need it to
> work well.
> 
> I would like to hear about personal experiences and any other technical
> differences between the card.  Again this is not intended to start a
> pissing contest or flame war....

One of the primary differences between the two cards is the Sangoma h/w 
echo canceler handles more cases of echo then do the Digium cards. 
Whether you need that additional coverage is 100% dependent on your 
specific implementation (eg, your T1/PRI provider), and not on what the 
list thinks about the two products.

Since there are no affordable tools to truly quantify echo for each 
specific implementation, as a pbx engineer your toolkit should probably 
include both cards. Sort of like try the less expensive card and if it 
doesn't address your echo issues, then try the more expensive one.

The downside to using Sangoma cards is that every time you upgrade 
zaptel you need to reapply the Sangoma patches using their less then 
straight forward documentation.