[asterisk-users] iaxmodem / hylafax receive problem

[Lee Howard]

Kingsley Tart wrote:
> Jan 14 12:44:49.39: [ 3403]: <-- [9:AT+FRH=3\r]
> Jan 14 12:44:56.39: [ 3403]: --> [0:]
> Jan 14 12:44:56.39: [ 3403]: MODEM <Empty line>
> Jan 14 12:44:56.39: [ 3403]: MODEM TIMEOUT: waiting for v.21 carrier
> Jan 14 12:44:56.39: [ 3403]: <-- data [1]
> Jan 14 12:44:56.39: [ 3403]: --> [2:OK]
>   

iaxmodem cannot "hear" any fax signaling in the call.

> Jan 14 12:44:56.39: [ 3403]: <-- [9:AT+FRS=7\r]
> Jan 14 12:45:26.39: [ 3403]: MODEM TIMEOUT: reading line from modem
> Jan 14 12:45:26.39: [ 3403]: MODEM <Timeout>
> Jan 14 12:45:26.39: [ 3403]: Failure to receive silence (synchronization failure).
> Jan 14 12:45:26.39: [ 3403]: <-- data [1]
> Jan 14 12:45:26.41: [ 3403]: --> [2:OK]

However, there is *some* kind of audio on the call.

It would seem that this test call is producing some kind of 
long-duration bad audio sounds which are not detectable by the modem as fax.

Thanks,

Lee.