#13 the echo mode doesn't take each character at a time

[Anonymous]

I connect to a Linux host via VT terminals.
The VT are connected with LAT (I need to know the
physical port of the DEC-Server the VT is linked to).
I get the prompt, I can work with the application, I
know the DEC-server port to manage the robot near the VT.

BUT : sometimes the character i typed doesn't echo on
the screen and don't do anything (I type PF4, and the
appplication have to show the next page, but doesn't do
this). If I type another character, then I see the 2
characters I've typed. In the application, I want to go
to the 5th field : I enter 4 times the key "Return",
but the cursor go 3 times to the next field. I must go
to the next one, so I type "Return" once more.... and
the cursor jump the field I want, and go to a field too
far.

I tested this application with telnet, the keys works
well, and it is nice to work with the application. But
I need LAT to know at with DEC-Server port the VT is
connected.

Is there a bug ?

Thank you for your answer.

[Nobody/Anonymous]

Logged In: NO

I forgot to give technical details :
Linux Redhat ES3 , Kernel 2.4.21-47 ELsmp
LAT version : 1.24 downloaded for 1 month
My email : jmgaite@psartus.com

Thank you for your answer

Jean-Michel Gaite

[Patrick Caulfield]

Logged In: YES
user_id=28255

It's hard to tell for sure where the characters are being
buffered.

By its very nature, LAT will buffer characters before
sending - it does this to make best use of the available
network bandwidth(rather than send each character in its own
packet). However, the LAT circuit timer is usually set low
enough that it shouldn't show the effects you mention.

Can you get a tcpdump of the conversation between the
terminal server and the Linux system - that way I will be
able to tell where the delay is occurring. (use the command
'tcpdump -xs0 -wlatdump.dmp lat'. and also send me the
output of "show system" and/or "show server" on the terminal
server please.