Caltta Expands DMR Portable Radio Series with New Model DH560
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Yunnan's Qujing, a city nestled in the complex terrain of the eastern Yunnan Plateau, faces tough challenges in ensuring reliable communication for public security. The region's varied topography and diverse environments have made secure and stable connectivity a critical issue for local police operations. Today, with support from Caltta, Qujing is advancing into a new era of more intelligent, efficient, and secure public security management—powered by a converged public-private communication network.
Located in eastern Yunnan, Qujing spans a landscape of interwoven mountains and basins, with urban and rural areas spread across a wide geographic area. The Qujing Public Security Bureau previously relied on a PDT (Professional Digital Trunking) system supported by over 40 base stations to establish basic regional communication. However, with the growing complexity and diversification of policing scenarios, the existing communication framework encountered four major challenges:
Persistent Coverage Gaps
Communication blind spots remained in key areas such as checkpoints, inspection stations, highways, underground spaces, and mountain tunnels.
Limited Bandwidth and Low Data Capacity
The system could not support the transmission of images, videos, or other multimedia data, hampering both situational awareness and response capabilities on the ground.
Lack of Communication for Auxiliary Officers
Auxiliary and joint duty personnel lacked effective communication tools, making it difficult to coordinate with frontline officers or provide real-time location tracking.
Inadequate Emergency Backup Mechanisms
In the event of private network disruptions, no stable and reliable backup communication channel was available.
To overcome these constraints, Qujing police adopted a transformative strategy—converged public-private networking with dual-network coordination.
In partnership with Caltta, the Qujing Public Security Bureau has built an integrated communication network that supports voice, video, location, and multimedia messaging. This unified solution merges public and private network resources to create a robust communication architecture featuring both horizontal collaboration and vertical integration.
Wide-Area Coverage
By leveraging the infrastructure of China's three major telecom operators, coverage has expanded from limited areas supported by 40+ base stations to over 96% of the region's geographic area, achieving truly borderless communication.
Converged Interoperability
Voice, video, GPS data, images, and dispatch messages are all transmitted through a centralized platform, enabling seamless collaboration across systems, levels, and departments.
Secure and Reliable
The system incorporates end-to-end encryption and dual authentication protocols certified by the Ministry of Public Security, ensuring data confidentiality and transmission integrity.
Flexible Deployment
The solution supports cost-effective access for police officers, auxiliary personnel, and community patrol teams using public network terminals—truly realizing the goal of a unified "grid-based" public safety network.
In large-scale security operations and emergency response scenarios, being "one step ahead" means greater efficiency, while maintaining "uninterrupted connectivity" is the bottom line. Caltta's public-private converged communication solution is enabling grassroots governance to evolve from localized "visibility" to comprehensive capabilities—full-area visibility, controllability, rapid dispatch, and stable transmission.
More than just communication—it's about seamless coordination.
More than just technology—it reflects a deep sense of responsibility.
Caltta will continue to work alongside public security forces across the country, delivering smarter networks, more resilient systems, and solutions that are closer to real-world needs—empowering the next leap forward in Smart Policing.
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