[asterisk-users] Which Digium cards to select: AEX with EF or E or P or B?

[Kevin P. Fleming]

On 06/11/2012 01:48 PM, bilal ghayyad wrote:

> I need to order Digium card and not able to know which one is the best quality? Is it that of AEX with the end E or EF or P or B?

Digium does not produce cards of differing quality levels; we strive to 
have all of our cards be produced with the best quality possible.

The various suffixes you refer to indicate whether the board is a plain 
board, with modules, with an echo canceller, or some combination of all 
of them.

> I saw those card that its slot is small (I think those that end by EF), are they the best card?

Each variant of a particular model is the same size. All AEX410 cards 
are the same size, for example, regardless of which modules are 
installed or whether an echo canceller is included. Whether a card's 
size makes it the 'best' card for your application is up to you to 
decide, based on the system you plan to install the card into.

> Really I am caring to have a card that has echo cancelation and the voice volume is high enough (because previously I faced the problem that the voice volume was low and I tried to resolve it without any success).

It will not matter which Digium card you choose, they will all produce 
identical signal levels ('voice volume') when plugged into your 
telephony circuit(s).

-- 
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
Jabber: kfleming at digium.com | SIP: kpfleming at digium.com | Skype: kpfleming
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at www.digium.com & www.asterisk.org