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UT1HZM > PACKET 05.07.23 22:06l 44 Lines 1677 Bytes #999 (0) @ WW
BID : 19964_UT1HZM
Read: GUEST
Subj: Re: Adding fx.25 to older tnc's
Path: IZ3LSV<IQ2LB<IW2OHX<UT1HZM
Sent: 230705/2019Z 19964@UT1HZM.KREM.POL.UKR.EU BPQ6.0.23
Hello.
Maybe a bit later reply.
On my think, its hard and useless idea.
Why not simply retire old HW and change to software modems?!
Performance will be improved not only by FX.25 code but also
better modem level decoding. Specially for HF packet, where
most of old HW modems/TNC are "deaf", compared to actual S/W ones.
Normally all current HF packet operators should OFF all their KAM's,
PK232's etc and replace by software tncs.
In EU we already done it a few years ago and no more 'nostalgie'
to those boxes with funny LEDs, hi.
73, Sergej.
Original Message
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>
> I was thinking of a process to add fx.25 to older tnc's kams etc.
> What my thoughts are is to intercept the data stream between the
> modem and the tnc uart. Capture the outgoing ax.25 packet and
> reform it with a small faster processor to fx.25 and send. Rx
> the incoming ax/fx.25 packets and if ax.25 pass on through or
> if fx.25 is received reform back to ax.25 after error correction
> and send to cpu or toss if bad. Lots of old tnc's on the 14.105
> hf packet network may benefit possibly with less retries on hf
> and also may be good for weak vhf links. Any ideas appreciated.
>
> 73 KF7Psm
>
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