Re: File transfer protocol for Radio Links

From: Michael Black (et472_at_FreeNet.Carleton.CA)
Date: 02/19/05 

Date: 19 Feb 2005 04:43:18 GMT

 (esamsalah@gmail.com) writes:
> What is the most suitable file transfer protocol when using HF,VHF
> radio link with a digital modem.
>
Track down what they used on AlohaNet in the early seventies in Hawaii.
First packet radio.

A few years later, one of the people connected with it, or maybe it
was just influenced, I forget, had a position with the DOC here in Canada,
and decided packet radio was what amateur radio needed. Hence the
first display of amateur packet radio here in Montreal back in May of 1978.

So look up amateur packet radio. It's been around all these years.

   Michael

> I tried the Zmodem with crash recovery in MS Hyper Terminal to transfer
> relatively small files but the transmission fails at the first bad
> packet
>
> But I should restart the transfer every time
>
> I think that Zmodem is a full duplex protocol and digital radio modems
> operates on a half duplex manner
>
> So Zmodem times out waiting ....
>
> Any advice or suggestion is welcomed
>
> Essam Salah
>