in the documentation i can not find a limit for the max_contacts value.
Is there one?
There is no enforced limit from the perspective of Asterisk, but there’s inherently limits in places - such as the type of variable that it is stored in, plus the size of packets (a response to a REGISTER includes the current list of Contacts).
Thank for the explanation @jcolp.
If i have n-device with one contact, are the n-device possible to make a outgoing call simultaneously?
You’re going to need to specify what “outgoing call” means to you.
If you mean a phone placing an outgoing call to a VoIP provider, for example, then there’s no limits except any you yourself add, limits of the system itself, or limits of the VoIP provider.
I am fine with answer. Thank you!