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Re: [hylafax-users] USR 5601 98F7 giving error: T.30 T2 timeout, expected page not received
On 2004.12.20 12:40 marthter wrote:
Linux (RedHat 9)
HylaFAX 4.2.0 from rpm (hylafax-4.2.0-1rh9)
USR internal 56K modem on ttyS4 (this is receive only and has the
problem):
ati0: 5601
ati1: 98F7
ati2: OK
ati3: U.S. Robotics 56K FAX INT Rev. 5.22.16
Dec 20 13:56:08.78: [18839]: <-- [11:AT+FRM=146\r]
Dec 20 13:56:10.04: [18839]: --> [7:CONNECT]
Dec 20 13:56:10.04: [18839]: RECV: begin page
Dec 20 13:56:12.34: [18839]: RECV/CQ: Bad 1D pixel count, row 120,
got 2087, expected 1728
Dec 20 13:56:12.34: [18839]: RECV/CQ: Adjusting for trailing noise (1
run)
Dec 20 13:56:12.34: [18839]: RECV: 120 total lines, 0 bad lines, 0
consecutive bad lines
Dec 20 13:56:12.34: [18839]: RECV: end page
Dec 20 13:56:12.34: [18839]: --> [10:NO CARRIER]
Dec 20 13:56:12.34: [18839]: <-- [9:AT+FRH=3\r]
Dec 20 13:56:16.21: [18839]: --> [7:CONNECT]
Dec 20 13:56:16.21: [18839]: --> [19:59 CD 45 15 3B 88 A5 D1 44 28 40
87 9D 3A CF CB 1C 10 03]
Dec 20 13:56:16.21: [18839]: --> [5:ERROR]
The modem is detecting a carrier drop when there isn't one and then is
accepting V.17 data with the V.21 setting.
120 lines would be a very short page at 3.85 l/mm (1.2 inches). The
data that is received that produces the ERRORs after that is still
image data.
So the modem is detecting a carrier drop when it shouldn't be. Most
likely this is the fault of the modem, but it could be that there
really was some event on the line that caused a temporary carrier
drop. The modem shouldn't be reading in image data with the V.21
setting, but I'm not a modulator guru, and maybe this is unavoidable.
When I encounter any error and a USR modem is involved I always, always
blame the modem first unless I have good evidence otherwise.
Lee.
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