[Asterisk-Users] Pros and Cons of T1/E1 cards

[David Waugh]

Hi Luke,
 
It's important to compare apples and pears though.
 
The card you mentioned has 24 on board Digital Signal Processors that enable it to do the following:

*	Tone Detection
*	Voice Activity Detection
*	Conferencing with automatic Gain Control and echo cancellation
*	Continuous full duplex audio support
*	Speech recognition support

This means for example that the card could be used for a conferencing application with 24 users with echo cancellation/ gain control being handled by the card - and not having to be processed by the central CPU.
 
Full information can be found here:
http://tinyurl.com/dnphn
 
I hope this clarifies things.
 
David
 
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