Discover the efficiency of the NEC SL1100 4-Port CO Trunk Daughter Board, model IP4WW-4COIDB-B1. This essential component supports four standard loop-start CO trunks, enhancing your system's connectivity. Additionally, it interfaces with up to eight digital stations, making it a versatile choice for expanding your communication capabilities. You can install up to three of these boards per system, ensuring scalability as your needs grow. Upgrade your setup today and experience seamless integration and expanded functionality!