Serial

(NEWEST POST)
My serial connections are losing characters First, check the NCLIST kernel parameter. This governs how many CLIST structures are allocated; these are used to buffer input and output. If this is too low, then at times of high serial I/O demands, your system will run out of CLIST structures and start discarding characters. Note that there is a limit as to how many CLIST structures may be allocated to an individual process, regardless of how many are available systemwide. This is done to prevent one misbehaving program from monopolizing all of the CLIST structures. Look for the tunable parameter TTHOG (only available in newer Unix systems), which controls this limit.
Serial Printer I wonder if anyone can help with an issue we are having trying to setup a printer on a new Unix server box via Serial Printing. Details as follows:
Digiboard Serial Ports on Linux Servers Recently I have been working on a RedHat server installing all manner of stuff including serial ports. This customer has an 56K DDS line under contract for a few more years so we went with a Digi C/X controller to match what was in their SCO server. When I asked Digi tech support about a couple of things that weren't clear they suggested that I forget the the software and epca drivers that came with the controller and instead download and install their dgap drivers which comes with their familiar mpi software for configuring the board


Unix Cartoons

Unix Crossword Puzzles

Unix Consultants

Unix Skills Tests



Title Date Comments
No more Parallel/Serial?   2006 12  2007/02/16 19:57 TonyB

Serial Printer   2006 07  2006/07/28 03:37 anonymous

Strange Terminal Emulation problem   2005 02  2005/02/21 19:24 TonyLawrence

Digiboard Serial Ports on Linux Servers   2004 09 

console output to serial port linux   1997-2004 

Device::SerialPort on Redhat 8   2003 04 

Log Serial Port Data to a Specified Logfile   2002 09 

RS232 Wiring Diagrams   2001 12  2005/10/22 02:17 anonymous

Installing an Equinox SST-64 under Linux   2001 03 

Serial Printers   1998 

Understanding Serial Wiring   1992  2008/10/31 22:01 BigDumbDinosaur

Qume Serial X-Terminal   1997 12 

 
 
 
 
I've set the modem for 38400 in inittab, but stty shows it at some other speed   1997-2003 

Why can't I get my dialin modem to work above 9600 baud?   1997-2003 

Will a Winmodem work?   1997-2003 

What are some common settings for my modem?   1997-2003 

I can't get shared dial-in and dial-out working   1997-2003 

I edited my gettydefs and things broke   1997-2003 

Where can I get more information on UUCP protocols?   1997-2003 

A BSD-based machine can't connect to mine via UUCP   1997-2003 

My data-compressing modem doesn't work much faster than my old modem   1997-2003 

How do I maximize serial throughput?   1997-2003 

What are all the V.something codes, MNP, HST, etc.?   1997-2003 

What special considerations are there regarding my Telebit modem?   1997-2003 

How do I change uucico's packet timeout?   1997-2003 

UUCP frequently has to resend packets   1997-2003 

I increased my window size and UUCP broke!   1997-2003 

I increased my window size but nothing changed   1997-2003 

How do I change uucico's window size?   1997-2003 

How do I get better UUCP throughput?   1997-2003 

I can transfer small files via UUCP but large ones won't go   1997-2003 

How do I adjust my 16550's trigger level?   1997-2003 

What do the terms UART, 8250, 16450 and 16550 mean?   1997-2003 

My serial connections are losing characters   1997-2003 

pavatar.jpg book graphic








Have you tried our Tests?