[Info-vax] VMS faxing

[Rich Jordan]

On Saturday, August 14, 2021 at 3:30:55 AM UTC-5, gah4 wrote:
> Some years ago, I thought about how to make a fax send system, but never did it. 
> 
> As well as I remember, getting the handshaking right on the serial port was the important part. 
> 
> If you get it wrong, you overrun the buffer. 
> 
> But the other possibility is that you aren't getting the data out fast enough, 
> and underrun the buffer. Increasing the delay between lines would help. 
> 
> Otherwise, a higher serial port baud rate might help. 
> 
> Lowering the baud rate on the fax side might help, too. 
> 
> In faxing through VoIP lines, even with 711u encoding, it is best 
> at lower baud rates.

We are going to try lower baud rates before trying faster, if at all.  The DS200 topped out at 19200, the DS700 can go a lot faster.

We have queries out to their phone vendor to determine what the phone lines in use actually are; their paper docs said they were POTS lines but they were 11 years old, so maybe its been changed in the background.