[COLUG] Cingular aircard operation problem

[Jim]

charles morrison wrote:

< ... the aircards seem to disconnect during a session.

< My son has found that if he drops to a command prompt and issues a 
< continuous ping (under Windows), the connection is maintained and he 
< gets very good speed. This indicates to us that the Cingular network 
< disconnects us in a very short period of inactivity. We would both like 
< some ideas on how to maintain the Cingular connection, he, using windows 
< and I, using Kubuntu, which will not keep the network busy with pings, 
< but keep the connection alive so the card is usable.

If you are trying to maintain _TCP_ connections under Linux, 
like an ssh connection of long duration, but with 
idleness, that you don't want broken, 
a solution could be something like: 

   echo 30 >/proc/sys/net/ipv4/tcp_keepalive_time

Explore the other /proc/sys/net/ipv4/tcp_keepalive_* pseudofiles. 

If there isn't a TCP connection to maintain, 
maybe ping is the way to go. 

It'd be good to learn the screen command also.