SIP (Session Initiation Protocol) is used to establish and manage VoIP calls.
SIP Trunk connects an IP PBX (e.g. Asterisk) directly to a VoIP provider over the internet.
The benefits include easy maintenance and efficient support for remote teams.
Proper configuration and security are critical: a correctly configured firewall, strong passwords, Fail2Ban, limited codecs, and continuous monitoring are mandatory to prevent fraud and call-related issues.




