Email robots on HF bands

Mike O'Dell mo at
Sat Mar 24 13:26:04 CDT 2007

Nan and Sandy Sanders wrote:
> Bob, do the robots listen at all before they respond? Say requester at 
> location A has propagation only to a robot at location B. Location B 
> also has a path to locations C and D where a QSO between 2 RTTY stations 
> is going on. Requester at A not hearing C or D sends a request to robot 
> at B and the request is decoded through the signals from D or E, will 
> the robot start transmitting on to of the QSO between C and D?
>         Sandy
>         WB5MMB
> At 8:07 AM 3/24/2007, Robert Bruninga wrote:
>> I think we have been duped by chicken little..
>> Winlink HF mail box systems do not TX on their own.  They only
>> RESPOND to a sentient human logon request.  It is the
>> responsibility of those human operators to listen to the
>> frequency first before logging on.
>> I think
>> Bob, WB4APR
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and how is this situation unique to robots?
asymmetric connectivity and the hidden transmitter problem
are just facts of life in the radio realm.


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