Disclosed are system and method for providing an advertisement service
using the call-connecting signal in the server of a common carrier. The
method includes receiving a call request signal from the originator
terminal, extracting an advertisement message from the advertisement
database, and sending the advertisement message to the originator
terminal. Also, the method further includes interrupting sending of the
advertisement message if a call is connected between the originator
terminal and the recipient terminal, extracting further commercial data
related with the advertisement message, and sending the extracted further
data to the originator terminal.