On Sat, 2008-10-18 at 22:50 +0530, Rajiv Gore wrote:

Hi When I telnet localhost 110 I get a response as +OK POP3 localhost 2006c.94 server ready I expect to get +OK Dovecot ready.

Right.

Is there any other pop3 server running on port 110?

Yes.

If so how to assign port 110 to Dovecot?

Did you read Ken's reply to your previous question? http://dovecot.org/list/dovecot/2008-October/034463.html

You'll first need to get rid of your old POP3 server. How to do that has nothing to do with Dovecot.