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China SIP Trunk: Private SIP vs Public SIP

In China, China goverment local service provider will provider SIP Trunk with 2 types which is Private and Public



Private SIP Trunk is more secure because connection is internal



Public SIP is easy to use because through internet

Private SIP Trunk vs Public SIP Trunk

Private SIP Trunk

Cloud SIP Trunk
China Service Provider China Telecom, China Unicom, China Mobile China Telecom, China Unicom, China Mobile
Installtion address same city office address as the number applyment Not need
Server IP format 191.1.x.x Internal IP 47.100.x.x Internet IP
Connection Physical fiber lines Connection to local office SIP credentials
IP to IP Connection