Solved

Setting 16550A serial port to 230,400 bps.

Posted on 1997-12-15
3
672 Views
Last Modified: 2011-04-14
I have an x86-based Linux box with 16550A serial ports (it is a fairly new machine).  Or at least setserial claims that they are 16550A's.  My OS is RedHat 4.2.  I'm using PPP 2.2.I'm trying to connect to my extern ISDN modem (AdTran XRT) at 230.4k.  The modem end is easy -- just a DIP switch.  But I cannot chant the right incantation to make Linux set the serial port to 230k.  I've tried putting things like this in rc.local and/or the ifup-pp script:    setserial /dev/cua0 baud_base 230400 divisor 1 spd_custWhen I do that (and set the modem for 230k), they do not talk anymore.  Does anyone know the right formula?
0
Comment
Question by:jlilley
  • 2
3 Comments
 
LVL 1

Accepted Solution

by:
solmssen earned 50 total points
ID: 1634747
As far as I know - a 16550A can't be set to 230.4K. I have the same problem, and ended up getting a 16650 card from ByteRunner for about $25. This has a jumper so the card tells the system it's 115.2K but talks to the modem at 230.4K. This works very well - I see roughly 16-17Kbytes per second on ftp's.

Try www.byterunner.com for more info.
0
 

Author Comment

by:jlilley
ID: 1634748
Well, it's not the answer I wanted to hear, but $25 is cheap!
0
 

Author Comment

by:jlilley
ID: 1634749
Just contacted ByteRunner...  $20 for the card, $4 for shipping.  Card runs at 480kbps.  Cool!
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

This is the error message I got (CODE) Error caused by incompatible libmp3lame 3.98-2 with ffmpeg I've googled this error message and found out sometimes it attaches this note "can be treated with downgrade libmp3lame to version 3.97 or 3.98" …
I am a long time windows user and for me it is normal to have spaces in directory and file names. Changing to Linux I found myself frustrated when I moved my windows data over to my new Linux computer. The problem occurs when at the command line.…
Connecting to an Amazon Linux EC2 Instance from Windows Using PuTTY.
This demo shows you how to set up the containerized NetScaler CPX with NetScaler Management and Analytics System in a non-routable Mesos/Marathon environment for use with Micro-Services applications.

911 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

21 Experts available now in Live!

Get 1:1 Help Now