in the isdn tab, enter the system.s isdn numbers. local area and country codes are not added in most cases. consult with the local isdn provider.

    the order of the isdn numbers must match the order in which the isdn lines were connected. consult with the system administrator.

    if the selected isdn switch supports spid (service profile identifier) numbers, the spid numbers boxes appear on the isdn tab. enter your spid numbers as directed by the local provider.