[aprssig] UZ7HO Soundcard Modem

Lynn W. Deffenbaugh (Mr) ldeffenb at homeside.to
Fri Dec 30 11:47:36 EST 2011

On 12/30/2011 11:34 AM, kb2scs at optonline.net wrote:
> Hi All
>            Due to the name of UZ7HO Soundcard software
> "Sound Modem"
> Here is a stupid question.
> The Software is a modem and not a packet engine correct?
> In other words in order to do connected packet with it one would have
> to write the full AX25 protocol in their packet program.

Correct as far as I understand it.

> The packet program would have to handle all the different
> AX25 packets such as SABM for example.

Yes, AFAIK Soundmodem doesn't handle connected packet, but simply passes 
packets back to the connected program.

> On the other hand I have heard that UZ7HO's Soundcard Modem
> is a direct replacement for AGWPE.

I'm not sure it implements the full interface spec, but I know that it 
handles the AX.25 packets well enough to be a drop-in replacement for 
AGW's PE (and pro) when interfacing from APRSISCE/32.

> Confused.

The best you can do is point your favorite PE-supporting client 
application to Soundmodem and see what happens!

Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

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