AT-PA-IPINT AT-PA-IPINT is one IP intercome system which could two way full duplex emergency & service inquiry communicate with intercom master station AT-PA-IPCT9700A The IP Network Intercome Slave Station or dual button door station is designed for two way duplex emergency communication system. Control input and output is used to integrate with door access, CCTV or fire alarm system. Ideal for bank, factory, school, park, hospital, and train station emergency help communcation system.