Install opensips-tls-module by entering the following commands in the terminal:
sudo apt update sudo apt install opensips-tls-module
Description:
TLS transport module for OpenSIPS
OpenSIPS is a very fast and flexible SIP (RFC3261) server. Written entirely in C, OpenSIPS can handle thousands calls per second even on low-budget hardware. . This package provides the TLS support for OpenSIPS.
Homepage: http://www.opensips.org/
Version: 2.2.2-3build4
Section: universe/net