We have a strange problem with ATA186-I2-A . 

(Fax1)-(ATA)----(ip)----(AS5350)-(PSTN)-(Fax2). In this simple scheme ATA 
marked as ATA186-I1 works great , faxes going in and out. Instead of this 
ATA186-I2-A fail to send&recive any faxes. Yes , configuration and software 
version is same on both devices. Only faxes fail , conversation works great.
. 
Faxes ATA->ATA goes successfully.

Here is sound of unsuccessful connect : *http://tinyurl.com/a2h3o* (composed
 
from rtp)

Any suggestions ?

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