[aprssig] KPC3+ TNC

Andrew Rich vk4tec at tech-software.net
Tue Aug 29 23:52:34 CDT 2017


Thanks Tom

Looking

Sent from my iPhone

> On 30 Aug 2017, at 2:18 pm, Tom Hayward <esarfl at gmail.com> wrote:
> 
> Andrew,
> 
> If you check the archives, there's a nice thread about this about two
> weeks ago. One of the interesting points made was that KISS protocol
> specifies no flow control, yet these TNCs seem to be doing flow
> control.
> 
> Tom KD7LXL
> 
>> On Tue, Aug 29, 2017 at 9:11 PM, Andrew Rich <vk4tec at tech-software.net> wrote:
>> 
>>> 
>>> I have been doing research on the suggested KPC3+ TNC delayed packets
>>> 
>>> Drawing on my 30 odd years of playing with tnc my initial gut feeling was flow control
>>> 
>>> I see it on my kpc9612
>>> 
>>> It's not a bug
>>> 
>>> It's the pc asserting rs232 signals
>>> 
>>> I run minicom and assert the rs232 and I see data flow from ages ago stored up
>>> 
>>> The obvious solution would be to loop CTS and RTS and turn off all HW flow control
>>> 
>>> Anyone got a nicely working kpc3+
>>> 
>>> Would like to buy one if this is not an issue
>>> 
>>> Andrew
>>> 
>>> Sent from my iPhone
>> 
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