Hi worl!!

its not difficult for you ppl but for me. what i am looking for up here is only a shortest and simplest question.

i am on a network in an ISP. i want to send "pop-u message" to my users "connected" onto my access server.

1- HOW CAN I SEND MESSAGE TO THOSE PPL BEFORE I AM GOING TO DO ANYTHING.

hope some of you would definitly reply me. asap.

athar