To control multiple Bosch devices at the same time using a public address, you can create a Paging Zone in Security Center.
From the Config Tool homepage, select the Sipelia plugin role.
Click the Public address tab.
Click Add a paging zone.
Enter a descriptive name for your paging zone, and then click Add.
Enter a description for the paging zone.
Assign an extension to the paging zone.
Click Auto-assign. Select a range, and click Apply to assign the next available extension in the selected range.
This is the recommended approach.
Enter the Extension manually.
Enter the Automatic start timeout to define the amount of time, in seconds, until the broadcast begins.
Devices can connect before the message starts. If all the devices in the paging zone accept the call, the message starts even if the timeout is not complete. If a device accepts after the timeout, it can join the paging group with the message in progress.
Click Add a paging zone member.
In the Select entity dialog box, choose the entities that you want to include in your paging zone.
You can use the Entity type drop-down list to filter by entity type, and then search for the entities by name.
Select an entity, and click Select.
Click Apply.
After you finish
Register the Bosch device to the Sipelia Server.