Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Modem Incongruency

Posted on 1997-02-22
1
Medium Priority
?
229 Views
Last Modified: 2010-03-17
I just installed Slakware 96 and everything work well except my dialup connections to my school and ISP.  When I login to my school using minicom, I lose quite a few charaters in the transmission.  When I try to run pine at school, you can imagine the confusion.  I have set no echo, vt102 mode, and my setserial command in the rc.serial is manual with spd_vhi at the end because I have a USRobotics Sportster 28.8.  Also when I run seyon, I notice the default speed is 9600, and when I change it to 38400, I can't save it.  Starting up seyon again brings up the 9600bps.  This has ramifications for problems with my ppp connection which I won't go into, except to say that minicom keeps reporting the message: 'cua2: x input overruns' (with x < 5).  Thanks for your help.
0
Comment
Question by:emart
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 1

Accepted Solution

by:
mart010897 earned 100 total points
ID: 1584186
Hi,

What you most likely have is a 16450 UART serial port or some other inadequate UART chip.  You can verify this by looking at the output of the "dmesg" command.  Look for the lines that say tty at the beginning-- it will tell you what type of UART it is.  Basically, at higher serial speeds, the buffers of some UARTs get overrun.

Most of the time you can upgrade your UART chip in place to take advantage of higher serial speeds.  You can consult your local PC-superstore or whatever to get details for your hardware.

Until you can get the upgraded serial chip, you are going to have to connect at lower speeds-- just set your serial port down to 38400 or so and it should stop losing data.

If an inadequate UART is not the problem, then you most likely have a cable problem.  You can try changing serial cables if you like.  But I've had the UART problem before, and it's exactly the symptoms you are describing.

Hope this helps...

Mart
0

Featured Post

VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

Question has a verified solution.

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

I have seen several blogs and forum entries elsewhere state that because NTFS volumes do not support linux ownership or permissions, they cannot be used for anonymous ftp upload through the vsftpd program.   IT can be done and here's how to get i…
Note: for this to work properly you need to use a Cross-Over network cable. 1. Connect both servers S1 and S2 on the second network slots respectively. Note that you can use the 1st slots but usually these would be occupied by the Service Provide…
If you're a developer or IT admin, you’re probably tasked with managing multiple websites, servers, applications, and levels of security on a daily basis. While this can be extremely time consuming, it can also be frustrating when systems aren't wor…
In this video, Percona Director of Solution Engineering Jon Tobin discusses the function and features of Percona Server for MongoDB. How Percona can help Percona can help you determine if Percona Server for MongoDB is the right solution for …

705 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