Re: [hylafax-users] t38modem, failure to receive silence

[Lee Howard <faxguy@xxxxxxxxxxxxxxxx>]

Daniele Martini wrote:

> Jun 16 16:47:46.05: [ 2224]: TRAINING succeeded
> Jun 16 16:47:46.05: [ 2224]: <-- [9:AT+FTH=3\r]
> Jun 16 16:47:46.05: [ 2224]: --> [7:CONNECT]
> Jun 16 16:47:46.05: [ 2224]: <-- data [3]
> Jun 16 16:47:46.05: [ 2224]: <-- data [2]
> Jun 16 16:47:47.10: [ 2224]: --> [2:OK]
> Jun 16 16:47:47.10: [ 2224]: <-- [10:AT+FRM=98\r]
> Jun 16 16:47:48.98: [ 2224]: --> [8:+FCERROR]
> Jun 16 16:47:48.98: [ 2224]: <-- [10:AT+FRM=98\r]
> Jun 16 16:47:48.98: [ 2224]: --> [8:+FCERROR]
> Jun 16 16:47:48.98: [ 2224]: <-- [9:AT+FRH=3\r]
> Jun 16 16:47:48.98: [ 2224]: --> [7:CONNECT]
> Jun 16 16:47:50.39: [ 2224]: --> [2:OK]
> Jun 16 16:47:50.39: [ 2224]: RECV recv TSI (sender id)
> Jun 16 16:47:50.39: [ 2224]: REMOTE TSI "YYYYYY"

This is the repeated problem in session 000009521.  It seems to indicate 
that the sender cannot "hear" your CFR signal.  That said, I really 
think that this session requires the inspection of the t38modem author, 
since it seems to represent a bug either in t38modem or in the T.38 
gateway (and the latter wouldn't be surprising, actually).

> Jun 16 10:43:54.44: [ 2224]: <-- [11:AT+FRM=146\r]
> Jun 16 10:43:56.69: [ 2224]: --> [7:CONNECT]
> Jun 16 10:43:56.69: [ 2224]: RECV: begin page
> Jun 16 10:44:09.63: [ 2224]: RECV: 0 total lines, 0 bad lines, 0 
> consecutive bad lines
> Jun 16 10:44:09.63: [ 2224]: RECV: end page
> Jun 16 10:44:09.63: [ 2224]: --> [10:NO CARRIER]
> Jun 16 10:44:09.63: [ 2224]: <-- [9:AT+FRH=3\r]
> Jun 16 10:44:09.83: [ 2224]: --> [7:CONNECT]
> Jun 16 10:44:10.99: [ 2224]: --> [2:OK]
> Jun 16 10:44:10.99: [ 2224]: RECV recv EOP (no more pages or documents)

This is in session 000009430, and basically it says that the sender 
started Phase C as expected, but that 13 seconds later the sender 
apparently aborts the fax without sending any page image data.  Did the 
sender have a paper jam or something?  If not, then it's probably a bug 
in the T.38 gateway.

> Jun 13 08:10:20.58: [ 2224]: RECV training at v.17 14400 bit/s
> Jun 13 08:10:20.58: [ 2224]: <-- [11:AT+FRM=145\r]
> Jun 13 08:10:25.08: [ 2224]: --> [0:]
> Jun 13 08:10:25.08: [ 2224]: MODEM <Empty line>
> Jun 13 08:10:25.08: [ 2224]: <-- data [1]
> Jun 13 08:10:25.08: [ 2224]: --> [2:OK]
> Jun 13 08:10:25.08: [ 2224]: <-- [9:AT+FRS=7\r]
> Jun 13 08:10:25.15: [ 2224]: --> [2:OK]
> Jun 13 08:10:25.15: [ 2224]: <-- [9:AT+FTH=3\r]
> Jun 13 08:10:25.15: [ 2224]: --> [7:CONNECT]
> Jun 13 08:10:25.15: [ 2224]: <-- data [3]
> Jun 13 08:10:25.15: [ 2224]: <-- data [2]
> Jun 13 08:10:27.22: [ 2224]: --> [2:OK]
> Jun 13 08:10:27.22: [ 2224]: TRAINING failed

The modem (well, the T.38 gateway) cannot "hear" the high-speed image 
data coming from the sender.  This probably represents a bug in the T.38 
gateway... but you may want to have the t38modem author look at this, too.

Thanks,

Lee.




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