[hylafax-users] Class1 speed problem

[Thomas Jalsovsky <thomasj@eworld.hu>]

Hello,

      I use a Class 1 software modem (t38modem) and I'm sending fax
      messages.
      Sometimes I can send with speed 14.400 bps, bud many times only
      with 4.800 bps (to the same number).

      I found:
Mar 31 16:31:23.17: [23430]: SESSION BEGIN 00000688 003612258591
Mar 31 16:31:23.17: [23430]: HylaFAX (tm) Version 4.1.5
Mar 31 16:31:23.17: [23430]: SEND FAX: JOB 203 DEST 003612258591 COMMID 00000688 DEVICE '/dev/ttyx1'
Mar 31 16:31:23.17: [23430]: MODEM set DTR OFF
Mar 31 16:31:23.17: [23430]: MODEM set baud rate: 0 baud (flow control unchanged)
Mar 31 16:31:23.17: [23430]: DELAY 75 ms
Mar 31 16:31:23.24: [23430]: MODEM set DTR ON
Mar 31 16:31:23.24: [23430]: DELAY 2600 ms
Mar 31 16:31:25.85: [23430]: MODEM set baud rate: 19200 baud, input flow RTS/CTS, output flow RTS/CTS
Mar 31 16:31:25.85: [23430]: DELAY 10 ms
Mar 31 16:31:25.85: [23430]: MODEM flush i/o
Mar 31 16:31:25.85: [23430]: <-- [4:ATZ\r]
Mar 31 16:31:25.88: [23430]: --> [3:ATZ]
Mar 31 16:31:25.88: [23430]: --> [2:OK]
Mar 31 16:31:25.88: [23430]: DELAY 3000 ms
Mar 31 16:31:28.87: [23430]: <-- [5:ATE0\r]
Mar 31 16:31:28.88: [23430]: --> [4:ATE0]
Mar 31 16:31:28.88: [23430]: --> [2:OK]
Mar 31 16:31:28.88: [23430]: <-- [5:ATV1\r]
Mar 31 16:31:28.88: [23430]: --> [2:OK]
Mar 31 16:31:28.88: [23430]: <-- [5:ATQ0\r]
Mar 31 16:31:28.88: [23430]: --> [2:OK]
Mar 31 16:31:28.88: [23430]: <-- [7:ATS0=0\r]
Mar 31 16:31:28.88: [23430]: --> [2:OK]
Mar 31 16:31:28.88: [23430]: <-- [7:ATS8=2\r]
Mar 31 16:31:28.88: [23430]: --> [2:OK]
Mar 31 16:31:28.88: [23430]: <-- [8:ATS7=60\r]
Mar 31 16:31:28.88: [23430]: --> [2:OK]
Mar 31 16:31:28.88: [23430]: <-- [12:AT+FCLASS=1\r]
Mar 31 16:31:28.88: [23430]: --> [2:OK]
Mar 31 16:31:28.88: [23430]: <-- [7:ATL0M1\r]
Mar 31 16:31:28.89: [23430]: --> [2:OK]
Mar 31 16:31:28.89: [23430]: MODEM input buffering enabled
Mar 31 16:31:28.89: [23430]: <-- [12:AT+FCLASS=1\r]
Mar 31 16:31:28.98: [23430]: --> [2:OK]
Mar 31 16:31:28.98: [23430]: DIAL 003612258591
Mar 31 16:31:28.98: [23430]: <-- [17:ATDT003612258591\r]
Mar 31 16:31:35.70: [23430]: --> [7:CONNECT]
Mar 31 16:31:35.70: [23430]: MODEM input buffering disabled
Mar 31 16:31:36.53: [23430]: --> HDLC<23:FF C0 02 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04>
Mar 31 16:31:36.53: [23430]: --> [2:OK]
Mar 31 16:31:36.54: [23430]: REMOTE CSI ""
Mar 31 16:31:36.54: [23430]: <-- [9:AT+FRH=3\r]
Mar 31 16:31:36.54: [23430]: --> [7:CONNECT]
Mar 31 16:31:36.95: [23430]: --> HDLC<13:FF C8 01 00 77 1F 23 01 09 01 01 19 06>
Mar 31 16:31:36.95: [23430]: --> [2:OK]
Mar 31 16:31:36.95: [23430]: REMOTE best rate 14400 bit/s
Mar 31 16:31:36.95: [23430]: REMOTE max page width 1728 pixels in 215 mm
Mar 31 16:31:36.95: [23430]: REMOTE max unlimited page length
Mar 31 16:31:36.95: [23430]: REMOTE best vres 7.7 line/mm
Mar 31 16:31:36.95: [23430]: REMOTE best format 2-D MMR
Mar 31 16:31:36.95: [23430]: REMOTE supports T.30 Annex A, ECM
Mar 31 16:31:36.95: [23430]: REMOTE best 0 ms/scanline
Mar 31 16:31:36.95: [23430]: USE 4800 bit/s
Mar 31 16:31:36.95: [23430]: USE 0 ms/scanline
Mar 31 16:31:36.95: [23430]: SEND file "docq/doc232.ps;01"
Mar 31 16:31:36.95: [23430]: USE page width 1728 pixels in 215 mm
Mar 31 16:31:36.95: [23430]: USE unlimited page length
Mar 31 16:31:36.95: [23430]: USE 7.7 line/mm
Mar 31 16:31:36.95: [23430]: USE 1-D MR
Mar 31 16:31:36.95: [23430]: SEND training at v.27ter 4800 bit/s
Mar 31 16:31:36.95: [23430]: <-- [9:AT+FTH=3\r]
Mar 31 16:31:36.95: [23430]: --> [7:CONNECT]
Mar 31 16:31:36.95: [23430]: <-- HDLC<23:FF C0 C2 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04 04>
Mar 31 16:31:36.95: [23430]: <-- data [23]
Mar 31 16:31:36.95: [23430]: <-- data [2]
Mar 31 16:31:38.64: [23430]: --> [7:CONNECT]
Mar 31 16:31:38.64: [23430]: <-- HDLC<6:FF C8 C1 00 52 1E>
...

   As you can see, the remote side said, the it's best speed is 14400
   and best format is 2-D MRR.
   My question is, why only 4800bps was choesed? What should I
   check/set to be able to send all the time with maximum speed?

   Thanks in advance,
          Thomas


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