Based on this product's specifications, here are some alternatives and similar models
ACO CDNVSp intermediate summator for CDNV system, model 4326
Summary description:
Intermediate summator ACO CDNVSp (model 4326) is designed for integration within the CDNV system. It functions as a summation/aggregation module to combine signals or inputs inside the CDNV product family. Intended for system installers and technicians working on CDNV installations, it facilitates orderly signal routing and connection between system components.