Custom monitor to monitor servers on telnet port 23

Thanks you.

Actually,  I am looking for a monitor example to do the telnet to the pool members to do the health check. What I need from monitor is to do the telnet to the server and provide the user-id and password and upon successful logging and logout makes the pool up or else marks it as down.

VIP abc listening on port 23

Pool XYZ

10.10.10.10 port 23

10.10.10.11 port 23

here pool xyz needs to be monitored using telnet port 23 to see if server is up and running.