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[hylafax-users] What is ^Q ^S in xonxoff?



Fax-modem data:
TP560 Data/Fax/Voice 56K Modem
External Controller Ver1.20, CheckSum=28FC
DSP Ver1.10 CheckSum=7962
Controller Ver1.20 Date:Apr 07 10:06

I could certainly use rtscts instead of xonxoff, but it seems that
xonxoff is more reliable with certain old fax machines.

What do ^Q and ^S mean? The fax is sent ok.

Aug 09 09:03:33.61: [11352]: SEND training at v.17 14400 bit/s
Aug 09 09:03:33.61: [11352]: <-- [9:AT+FTH=3\r]
Aug 09 09:03:33.66: [11352]: --> [7:CONNECT]
Aug 09 09:03:33.66: [11352]: <-- data [23]
Aug 09 09:03:33.66: [11352]: <-- data [2]
Aug 09 09:03:33.68: [11352]: --> [1:^Q]
Aug 09 09:03:33.69: [11352]: --> [7:CONNECT]
Aug 09 09:03:33.69: [11352]: <-- data [6]
Aug 09 09:03:33.69: [11352]: <-- data [2]
...
Aug 09 09:03:40.62: [11352]: --> [2:OK]
Aug 09 09:03:40.62: [11352]: TRAINING succeeded
Aug 09 09:03:40.62: [11352]: <-- [11:AT+FTM=146\r]
Aug 09 09:03:41.12: [11352]: --> [1:^S]
Aug 09 09:03:41.12: [11352]: --> [7:CONNECT]
Aug 09 09:03:41.12: [11352]: SEND begin page
Aug 09 09:03:41.12: [11352]: <-- data [1026]
...
Aug 09 09:03:42.74: [11352]: SEND send EOP (no more pages or documents)
Aug 09 09:03:42.74: [11352]: <-- [9:AT+FTH=3\r]
Aug 09 09:03:42.79: [11352]: --> [7:CONNECT]
Aug 09 09:03:42.79: [11352]: <-- data [3]
Aug 09 09:03:42.79: [11352]: <-- data [2]
Aug 09 09:03:44.11: [11352]: --> [1:^Q]
Aug 09 09:03:44.11: [11352]: --> [2:OK]
Aug 09 09:03:44.11: [11352]: <-- [9:AT+FRH=3\r]


I use the same config file for class-1-xonxoff  with another modem and
it does not print ^Q ^S sending the same data to the same remote fax
machine.
The "good" modem-fax is
RCV56DPF L8570A Rev 45.0/45.0
V2010-K56_DLS
a007840284C6002F
bC60000000
r1005111151012000
r3000111170000000


Thanks.

-- 
giulioo@pobox.com


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