Re: [hylafax-users] T.30 T2 timeout, expected signal not received

[Lee Howard <faxguy@xxxxxxxxxxxxxxxx>]

MOLLE Thomas wrote:
> sep 01 05:18:27.24: [ 1540]: <-- [11:AT+FRM=146\r]
> sep 01 05:18:28.33: [ 1540]: --> [7:CONNECT]
> sep 01 05:18:28.33: [ 1540]: MODEM input buffering enabled
> sep 01 05:18:28.34: [ 1540]: MODEM set XON/XOFF/FLUSH: input ignored,
> output generated
> sep 01 05:18:31.75: [ 1540]: RECV received RCP frame
> sep 01 05:18:31.75: [ 1540]: MODEM set XON/XOFF/DRAIN: input ignored,
> output disabled
> sep 01 05:18:31.75: [ 1540]: MODEM input buffering disabled
> sep 01 05:18:31.75: [ 1540]: --> [10:NO CARRIER]
>   

So here the Phase C image data carrier is detected, but after 3 seconds 
the carrier is lost.

> sep 01 05:18:31.75: [ 1540]: <-- [9:AT+FRH=3\r]
> sep 01 05:18:31.86: [ 1540]: --> [7:CONNECT]
> sep 01 05:18:32.10: [ 1540]: --> [2:10 03]
> sep 01 05:18:32.10: [ 1540]: --> [5:ERROR]
> sep 01 05:18:32.10: [ 1540]: MODEM Command error
> sep 01 05:18:32.10: [ 1540]: FCS error
>   

Then HylaFAX goes to listen for the Phase D signal but it seems the 
sender is still transmitting the Phase C signals or the audio is very 
corrupt.

> sep 01 05:18:32.10: [ 1540]: <-- [10:AT+FRS=21\r]
> sep 01 05:18:32.10: [ 1540]: --> [2:OK]
> sep 01 05:18:32.10: [ 1540]: <-- [9:AT+FTH=3\r]
> sep 01 05:18:32.18: [ 1540]: --> [7:CONNECT]
> sep 01 05:18:32.18: [ 1540]: <-- HDLC<3:FF C8 58>
> sep 01 05:18:32.18: [ 1540]: <-- data [3]
> sep 01 05:18:32.18: [ 1540]: <-- data [2]
> sep 01 05:18:33.34: [ 1540]: --> [2:OK]
> sep 01 05:18:33.34: [ 1540]: RECV send CRP (command repeat)
> sep 01 05:18:33.34: [ 1540]: <-- [9:AT+FRH=3\r]
> sep 01 05:18:34.05: [ 1540]: --> [2:]
> sep 01 05:18:34.05: [ 1540]: --> [10:NO CARRIER]
> sep 01 05:18:34.05: [ 1540]: MODEM No carrier
>   

Then HylaFAX asks the sender to retransmit the Phase D signal, but then 
some more problems in receiving any signal.

> sep 01 05:18:34.05: [ 1540]: <-- [9:AT+FRH=3\r]
> sep 01 05:18:34.05: [ 1540]: --> [5:ERROR]
> sep 01 05:18:34.05: [ 1540]: MODEM Command error

And at this point it appears that the modem is on-hook.

It could be modem problems, it could be audio quality problems.  If you 
have a different modem model to test with it may be worth trying.

HylaFAX+ 5.4.2 (http://hylafax.sourceforge.net) would give you different 
behavior here at some parts, and it's possible that it would get 
slightly different results, but not likely.

Thanks,

Lee.


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