[asterisk-users] Swichted digits on received number from fax on an fxs port

[Loic Didelot]

Hello,
I have connected a fax machine to a xorcom fxs port (signalling=fxo_ks).
But when I try to dial (send a fax) the number that I receive in
asterisk is wrong. Quite often a few digits are wrong but sometime is
correct. It looks like it works 2 times out of 10.

Examples: 
20333390 becomes 29333399 or 20333300
1234567890 becomes 1234566790


There is no voip in my scenario. 

Any help is appreciated.

Best regards,
Loïc.