Apollo Integrated Base Sounder - Slow Whoop with Isolator (45681-290APO) The Integrated Base Sounder is made up of a base sounder with integral mounting base. It is designed for indoor use. Key Features Two tones Two volume ranges 55-75dB(A) and 75-91dB(A) Individual and group addressing Unique acoustic self-test Built-in isolator Device Addressing The integrated base sounder responds to its own individual address set with a DIL switch. It also responds both to a group address, set by means of a 4-segment DIL switch and to a pulsed-mode synchronisation address which is embedded in the unit. GROUP ADDRESSING It may be desirable, in alarm conditions, to switch more than one integrated base sounder simultaneously. To enable this, sounders may be controlled as a group and given a group address which is common to all sounders in the group. When a device recognises its group address, it will process the forward command bits but it will not return any data to the control panel on that ad dress. If it is required to confirm the status of the outputs of devices under group address control, it is necessary to interrogate all devices in the group at their individual addresses. Communication XP95, Discovery and CoreProtocol compatible Backward Compatibility The features of the Integrated base sounder are available only when the sounder is connected to a control panel with the appropriate software.