Re: [hylafax-users] PPS error

[Lee Howard <faxguy@xxxxxxxxxxxxxxxx>]

On 2004.11.11 11:43 Imanol wrote:
> Hi:
>
> I use Hyla 4.2.0 with a modem TP560 DATA/FAX/VOICE 56K MODEM TP560
> Data/Fax/Voice 56K Modem/
>
> Previously I had problems with timeouts. So I changed the times, as I
> saw in
> hyla bugs page and it worked fine.
>
> But some times I get an error like this.
>
> I sent the fax to the same number from a Brother fax machine and no
> problem.

> Nov 11 20:23:08.80: [ 5253]: <-- [9:AT+FTH=3\r]
> Nov 11 20:23:08.84: [ 5253]: --> [7:CONNECT]
> Nov 11 20:23:08.84: [ 5253]: <-- data [7]
> Nov 11 20:23:08.84: [ 5253]: <-- data [2]
> Nov 11 20:23:10.26: [ 5253]: --> [2:OK]
> Nov 11 20:23:10.26: [ 5253]: SEND send PPS (partial page signal)
> Nov 11 20:23:10.26: [ 5253]: SEND send NULL (more blocks, same page)
> Nov 11 20:23:10.26: [ 5253]: <-- [9:AT+FRH=3\r]
> Nov 11 20:23:10.60: [ 5253]: --> [7:CONNECT]
> Nov 11 20:23:12.54: [ 5253]: --> [2:OK]
> Nov 11 20:23:12.54: [ 5253]: SEND recv PPR (partial page request)
> Nov 11 20:23:12.54: [ 5253]: DELAY 70 ms
> Nov 11 20:23:12.61: [ 5253]: SEND send frame number 0
> Nov 11 20:23:12.61: [ 5253]: SEND send frame number 1
> Nov 11 20:23:12.61: [ 5253]: SEND send frame number 2
> Nov 11 20:23:12.61: [ 5253]: SEND send frame number 3
> Nov 11 20:23:12.61: [ 5253]: SEND send frame number 4
> Nov 11 20:23:12.61: [ 5253]: SEND send frame number 5
> Nov 11 20:23:12.61: [ 5253]: SEND send frame number 62
> Nov 11 20:23:12.61: [ 5253]: SEND send frame number 63
> Nov 11 20:23:12.61: [ 5253]: SEND send frame number 64
> Nov 11 20:23:12.61: [ 5253]: SEND send frame number 65
> Nov 11 20:23:12.61: [ 5253]: SEND send frame number 66

Something is seriously wrong with the communication between this sender 
and that receiver.  Flow control, maybe?

> Nov 11 20:23:12.61: [ 5253]: SEND send frame number 112
> Nov 11 20:23:12.61: [ 5253]: SEND send frame number 113
....
> Nov 11 20:23:12.62: [ 5253]: SEND send frame number 254
> Nov 11 20:23:12.62: [ 5253]: SEND send frame number 255

If you *ever* see a PPR indiate that this many frames need to be 
retransmitted then there is an indication that something is not right 
with something deeper.  So flow control could be broken at whatever 
setting you're using (switch xonxoff to rtscts and vice versa).  Could 
be that the modem has an incompatibility of sorts with V.17 and this 
receiver.  I really don't know.  You'll have to test things.

Lee.

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