A valid domain: sip.alta3.com
NTP config update
A SSL certificate: lets-encrypt
SIP client: js.sip
The web server: NGINX
Kamailio Secure Web socket to SIP gateway: WSS to SIP
siremix: kamailio DB manager
NAT Traversal RTP proxy: rtpengine
A turn server for NAT traversal: coturn
A SIP target to call: asterisk server