Does anybody know how to control the timeout of the telnetd?

While inside my same machine and doing $>telnet 127.0.0.1, there is no timeout, but when doing this to another machine I myself setup with same Linux SuSE 9.3, I get 60 seconds idle time.

My router doesn't have a setting for the firewall's timeout for the services, i.e. the Telnet, and even when entering to my own machine through its public ip, i'm not timed out. The router on the other machine...I don't know if it has a way to control the timeout for the telnet connection...¿could the timeout setting be controlled by the firewall then?

I read this

http://www.linuxjournal.com/article/...ca10.0x85741e4

My profiles in either machine don't have the TMOUT line.
The /etc/xinetd/telnet files have no timeout lines.