This White Paper from XOP Networks describes the XOP Network’s SMS based Instant Conferencing Application. The XOP Networks USN platform supports SMPP3.4 protocol for interfacing with external SMSCs. This capability allows the USN to support both Mobile Originating (MO) and Mobile Terminating (MT) traffic. Therefore a subscriber can simply send a SMS text message to a short code assigned to the USN. The subject area of the SMS contains information about the people you want to have conference with.