A partnership venture between several cable companies is currently implementing an interconnect for the Greater Los Angeles Area of Dominant Influence (AD! in advertising terminology). The system is unique, but could be cost effectively applied to other markets. The method employed combines existing technologies in a unique manner to achieve the desired end result. Operation of the system is totally automatic and requires no manpower from the cable company affiliates. Available inventory is shared between the cable company and the interconnect. This sharing of inventory is flexible. Breaks can be alternated or shared within an available time slot.