Actually a few rigs with xon/xoff including the old Kenwood THD74 according to 
our defaults.
    .serial_handshake =  RIG_HANDSHAKE_XONXOFF,./kenwood/thd74.c

    .serial_handshake =  RIG_HANDSHAKE_XONXOFF,./aor/ar8200.c

    .serial_handshake =  RIG_HANDSHAKE_XONXOFF,./aor/sr2200.c

    .serial_handshake =  RIG_HANDSHAKE_XONXOFF,    .serial_handshake =  
RIG_HANDSHAKE_XONXOFF,
./aor/ar5000.c

    .serial_handshake =  RIG_HANDSHAKE_XONXOFF,./aor/ar8600.c

    .serial_handshake =  RIG_HANDSHAKE_XONXOFF,./aor/ar8000.c

    .serial_handshake =  RIG_HANDSHAKE_XONXOFF,./aor/ar2700.c

    .serial_handshake = RIG_HANDSHAKE_XONXOFF,./barrett/barrett.c

    .serial_handshake = RIG_HANDSHAKE_XONXOFF,./barrett/950.c

    .serial_handshake =  RIG_HANDSHAKE_XONXOFF,./racal/ra3702.c


Mike W9MDB
 

    On Friday, October 15, 2021, 10:03:06 AM CDT, Bill Somerville via 
wsjt-devel <wsjt-devel@lists.sourceforge.net> wrote:  
 
  On 15/10/2021 15:49, Barry Jackson via wsjt-devel wrote:
  
On 15/10/2021 15:02, Black Michael wrote: 
 
 
 I noticed you have serial_handshake=XONXOFF and stopbits=1 
 Just let those two items default to stopbits=2 and serial_handshake=Hardware 
which what I show is the setup for the TS-450. 
 And you should be able to just check all the Default labels in WJST-X's rig 
control tab too (which, by the way, should work for all rigs) 
 Mike W9MDB 
 
 
 I was waiting for you to comment on that. 
 
 The defaults have never worked at all for me with any versions of hamlib. 
 
 I know that is what the Kenwood manual says but it does not work. Only the 
settings as I have them provoke any sort of response from the rig. 
 
 I did contact you about 'correcting' the defaults in hamlib but you dismissed 
this at the time by blaming my USB interface: 
 
 Bus 002 Device 004: ID 10c4:ea60 Silicon Labs CP210x UART Bridge 
 
 So I forgot about it and just continued to add the parameters that it works 
perfectly with. 
 
 In fact I did try dropping all the -C options last night to see if anything 
had changed and there was no response at all. 
 
 Tested again with 4.2 and my parameters missing. Log attached. 
 
 Cheers, 
 Barry 
 G4MKT 
 
Barry,
 
the TS-450S and TS-690S use RTS/CTS hardware handshake flow control. I have 
never see a rig with a serial CAT interface that uses XON/XOFF flow control, 
RTS/CTS is ubiquitous on Kenwood rigs with the exception of some handhelds that 
only have a 3-wire CAT serial connection, and more recent rigs that have a menu 
option to disable the default RTS/CTS hardware handshake flow control.
 
Your interface may loop RTS and CTS at the rig end, that will provide a default 
RTS signal and will work with no flow control settings at the PC end.
 
73
 Bill
 G4WJS.

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