[Packet] Kenwood TM-D700

[Dr. Gerald N. Johnson]

On Wed, 2008-08-06 at 15:14 -0400, David Jordan wrote:
>                         
> I'm new to packet.  Have a new TM-D700.  Followed the manual directions but
> can't seem to get the unit to listen to the connected PC. 

I haven't used the pseudo TNC in the TM-D700 but I know N0LVA
(n0lva at mchsi.com) is using it. Its marginal for packet because it can
only accept one frame at a time and rejects transmissions having more
than one frame (at least fails to copy any frame past the first one and
so makes for slow packet network transmissions if the node or bbs sends
more than 1 frame at a time. I've found by experiment over decades that
collisions damage frames past the first one often enough that throughput
to a full blown TNC is greater if the node, TNC, and bbs have maxframe
set to 1. It is hard to convince all users and if there is only one user
on at a time, data may flow faster with a greater number of frames per
transmission except with the TM-D700 is involved.
> 
>  
> 
> Is there anyone on the list that has a 700 that is up and running with
> packet?  I'd like to ask some questions about software applications like
> HYPERLINK or BUXCOM, etc.
> 
I'm sure you have to match the data speed, number of bits, and
handshaking (hardware or software) between the computer an the TNC. The
TNC is much like a modem and has the same serial interface as a modem.

I have used HYPERLINK with a MFJ TNC so I know it can work. It likes to
think it has to dial but that's not hard to overcome. I'm using a DOS
program called YAM for my packet, its automated with a set of scripts so
I don't have to sit and watch 1200 baud data crawl by.

Since some packet messages include text graphics using extended
characters you will want to use 8 data bits, and for a start no parity,
1 stop bit. You can add parity once you have communications between the
computer and the TNC working. I like even parity.
>  
> 
> 73,
> 
> Dave
> 
> Wa3gin
> 
73, Jerry, K0CQ