... , but called intercom is available to answer the call within one minute,after 1 minuters then end call status automatically.2). If someone ... and create sound, will stop sound after two “Ding Dong”, and enter into standby status after 1 minute. If answer the call, sound ... in 4s, and the green light will flash, for one time after 4s clearing record.Coding to add more intercoms:Important: In ...