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Re: [hylafax-users] T.30 Error
On 2004.07.27 01:27 hylafax-users-bounce@xxxxxxxxxxx wrote:
Hi all,
I will appreciate if someone can give me an advice for a little
problem
I had.
Sometimes, receiving multi-page faxes, I get no answer to the AT+FRM
command after MCF.
What kind of modem are you using?
Jul 27 04:00:37.89: [ 8299]: RECV: begin page
Jul 27 04:01:00.45: [ 8299]: RECV: 2371 total lines, 0 bad lines, 0
consecutive bad lines
Jul 27 04:01:00.45: [ 8299]: RECV: end page
Jul 27 04:01:00.45: [ 8299]: --> [10:NO CARRIER]
Jul 27 04:01:00.45: [ 8299]: <-- [9:AT+FRH=3\r]
Jul 27 04:01:00.61: [ 8299]: --> [7:CONNECT]
Jul 27 04:01:01.74: [ 8299]: --> [2:OK]
Jul 27 04:01:01.74: [ 8299]: RECV recv MPS (more pages, same
document)
Jul 27 04:01:01.74: [ 8299]: DELAY 150 ms
This 150 ms delay is 55 ms longer than T.30 allows. Why have you made
it so long?
Jul 27 04:01:01.89: [ 8299]: <-- [9:AT+FTH=3\r]
Jul 27 04:01:02.02: [ 8299]: --> [7:CONNECT]
Jul 27 04:01:02.02: [ 8299]: RECV send MCF (message confirmation)
Jul 27 04:01:02.02: [ 8299]: RECV FAX (00000440): from xxxxxx, page
1
in 0:26, INF, 7.7 line/mm, 2-D MR, 14400 bit/s
Jul 27 04:01:02.02: [ 8299]: <-- data [3]
Jul 27 04:01:02.02: [ 8299]: <-- data [2]
Jul 27 04:01:03.21: [ 8299]: --> [2:OK]
Jul 27 04:01:03.21: [ 8299]: <-- [11:AT+FRM=146\r]
* Jul 27 04:01:10.21: [ 8299]: <-- data [1]
* Jul 27 04:01:10.24: [ 8299]: --> [2:OK]
Jul 27 04:01:10.24: [ 8299]: RECV keeping unconfirmed page
The modem is *supposed* to respond with CONNECT, ERROR, or +FCERROR
before 7 seconds elapse. However, it (like many, many other modems)
doesn't always do this it seems, and this is usually because either 1)
there is no carrier at all, e.g., the sender hung up, or 2) the sender
already has raised the high-speed data carrier, and the requisite
carrier flags are missed.
In this case I'd first suspect that the remote has hung up due to the
150 ms delay being longer than allowed.
Lee.
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