[Asterisk-Users] Why echo occurs

[Steve Underwood]

Steven Critchfield wrote:

>On Fri, 2005-02-11 at 15:35 +1100, Eric Bishop wrote:
>  
>
>>2. Is only a problem in 2-wire technologies (ie analog and BRI ISDN lines)?
>>    
>>
>
>It is just an analog problem. That is why a BRI can actually transmit
>direct digital data instead of audio data. 
>  
>
There is enough spill from the earpiece to the mike on most phones, that 
EC is required even on a digital phone.

Regards,
Steve