No when you set a trunk to do disa and you call in on that trunk it gives you a system tone not a dail tone. so at the system tone you dail 202 or what ever the extension is and the passcode ie 2024545 4545 bieng the passcode then dail say 701 for line one and make your call or you can dail an ext like 500 to ring the operator group or 201 to call that ext direct when you want to make another call dail * and to terminate your call dail #