[Asterisk-Users] Some questions re. T1 cards & QoS

[Kevin P. Fleming]

hugolivude wrote:

> 1)	Will I need a digital or analogue interface card?  I expect digital
> is the answer, but the Digium web site said something about analogue
> cards being able to support "provider T1 lines" whatever that means,
> so I was thinking about a TDM2400P because I want on board echo
> cancellation.  BTW the connector on the TDM2400P is a new one for me,
> how do you connect to it?

Where does it say 'provider T1 lines'? If it says that, it is wrong. The
only current Digium cards that can accept a T1 circuit are the TE110P,
TE205P/210P and TE405P/410P (plus their echo-can-module variants).

> If I have to go digital, which of the TE series do I need?  Again, I'm
> looking for echo cancellation and 1 T1 line.  The TE110P offers a
> single span T1, but no echo cancellation…

Normally doing echo cancellation in software is not a huge burden for
only a single span, unless you have echo that the software echo
cancelers cannot cancel. Digium does not currently offer a digital
interface card with echo cancellation except in the 4-span density.