Whatever functionality of netterm you need (telnet client, dialup client), you have native unix tools in every linux distribution. Telnet terminal is called telnet :o) and its manual page could be called by “man telnet”. Dialup connections are usually accomplished by ppp tools ( look up howto here: tldp.org/HOWTO/PPP-HOWTO/ ). Serial terminal functionality is implemented in minicom (“man minicom”) .
Any of this clients may be not installed by default in your distribution (which one, BTW?) but this is quite unlikely, since these are basic network tools.
hi mr. petkoa, thanx a lot for giving a thought to my question. i would like to directly email to you ( of course if you permit). u r requested to send me your email id so that i can ask you in detail. thanx again. tejinder (email@example.com).