Serial Driver for PPP - that runs in Half Duplex Mode
Hello,
Thanks for your mail. Can you let me know what are the other protocols that performs better than PPP ?
Thanks
Vanitha
-----Original Message-----
From: Alan Cox [SMTP:[email protected]]
Sent: Tuesday, August 17, 2004 10:12 PM
To: [email protected]
Cc: '[email protected]'
Subject: Re: Serial Driver for PPP - that runs in Half Duplex Mode
Quoted 3 lines · Vanitha Ramaswami
Do you have a serial port PPP Driver that supports half-duplex mode of operation ?. i.e. I need RTS to be active when you are transmitting data and to be inactive to receive.
You can do this with a user space helper if performance isnt critical (ie its not megabits). Create a tty/pty pair. Plug pppd one side of it and run your own program the other side between it and the real tty.
This is how the old scarabd radio driver worked, although not using PPP because we found that with the losses we got on radio other protocols worked better.
Quoted 2 lines · Vanitha Ramaswami
Hello,
Thanks for your mail. Can you let me know what are the other protocols that performs better than PPP ?
That will depend upon your link quality. If you drop a lot of frames then a link layer reliable protocol or FEC based protocol will do better. We used AX.25 (LAP-B with addressing). On radios that do their own reliability/error handling IP is often just fine (as with 802.11)