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Call stack is a small device, when some area is occupied by a higher priority call call, lead to the call cannot be sent to all required areas, this device can record the call. The device can store up to 16 high-quality calls, up to three minutes per call, including music and pre-recorded information. The call can also be played back during recording. This device can record and/or replay up to eight calls simultaneously. To increase the number of recordable calls, you can also add multiple such mounts to the system. These devices can be connected to any location in the Praesideo network. The basic functionality of the call memory is configured in Praesideo as part of the call macro. When a zone is occupied or a call in some zone is controlled, the user can configure the device to record the call for later playback. When these areas become available again, the call is automatically repeated back to the remaining areas, either once to all areas or one at a time to each. When the call is played back, it is removed from memory. The device can also configure a timeout to delete expired unsent calls. In addition, the call memory can also be used as a time converter to avoid acoustic feedback from the loudspeaker to the currently activated microphone. The call can be broadcast after the recording is complete, pre-monitored or cancelled before broadcasting. Time conversion and call storage can be used together. This device supports recording and playback of calls, but recorded calls are not saved or monitored during shutdown, so you should not rely on the call memory function to record emergency calls. This device can be configured through the Praesideo network controller (Web browser interface). Controls and two lights, used to indicate the power supply and the state of the network LED lamp interconnected components, two Praesideo network connector, service RJ11 connector (JTAG) certificate and approval security conforms to the standard IEC 60065 / EN 60065 immunity in accordance with EN 55103 ? 2 / EN 50130 / EN 50121 ? ? 4 standard cooling conform to EN 55103-1/4 FCC - 47 emergency conform to the EN standard 15 b parts 60849/EN 54-16 /ISO 7240-16 navigation in accordance with IEC 60945 regional certification European CPR EU_CPR CE COC CE CertAlarm