How to install asterisk on DigitalOcean?

Question

Asterisk

About 10 static sites and 5-6 with Wordpress are already running on one droplet
Tariff plan - 1 GB / 1 CPU, 30 GB SSD Disk, 2 TB Transfer
I wonder if a separate droplet is needed for the asterisk? It seems that his consumption is small + there are few calls (maximum 2 lines at the same time).
If not required, how best to install so as not to overwhelm existing sites?
I still don’t quite understand about billing, if I bought the number for free, and I make the PBX into an asterisk, then there will be billing for calls at free rates, right?

Answer 1

Tariffication will be like for free - because. they are operators and give you a number.
Asterisk is yours just like your automatic telephone exchange.
Two lines at the same time give a very weak load - so you can put everything in one heap (but if you think it will expand, then it's better to separate it).
And for two lines - you can look in the direction of a free automatic telephone exchange from Zadarma.