Max Number of Simultaneous Calls


I am getting started with a couple of Asterix projects and for one am considering using Asterix as a form of attention grabbing cross platform alarm.

My question: How many numbers can Asterix call simultaneously (without any audio)?

i.e. after a participant in the project signed up they would submit their phone number. All participants would then be called at the SAME time but there would not be any audio - the call would ONLY function as an alarm.

Any help would be appreciated!

On ISDN, the number of ISDN channels you have.

On VoIP, initially very large numbers, until your ITSP cottons on and imposes limits to stop you making free calls.