I am looking for feature that from all phones lets say at 9am some broadcast will be send.
Do I have to use paging in that feature or simply some sort of cron. Lets say at specific time of a day I want to play something in all phones some sort of message.
You could set up a reminder that would call the extensions and announce a message. It wouldn’t be on the speaker unless it was answered that way.
You can use VoiceMail Blast.
Use the Paging and Intercom Module.
Grandstream phones have an Auto Answer function that must be set to Yes, it goes to speaker phone after the first ring.