Based on industry standards for video surveillance services, the VCN provides access, forwarding, and Video on Demand (VoD) capabilities. It integrates multiple video surveillance services in one device, such as real-time surveillance, video playback, Pan-Tilt-Zoom (PTZ) controls, alarm linkage, voice intercom, video backup, networking, and forwarding. These services provide a secure, convenient, and practical video surveillance solution for government, transportation, education departments, and enterprises.