No Dedicated Lines for Multi-Branch Networking! SD-WAN All-Optical Interconnection Delivers Low-Cost Networking Without Public IPs

With a growing number of chain stores, subsidiaries and remote offices, video, audio and office data transmitted between headquarters and branches is becoming increasingly complex. For enterprises with multiple branches, building a separate network at each site and connecting to headquarters via traditional dedicated lines brings high upfront costs and complicated ongoing line maintenance.

In fact, multi-branch networking does not have to rely on expensive dedicated lines. Using regular broadband as the network foundation, SD-WAN can build a unified interconnection network between headquarters and branches. It meets demands such as video backhaul, audio & video scheduling and remote office resource sharing while cutting investment in public IPs and dedicated line resources.

I. The Challenge of Multi-Branch Networks Is Not Simply "Getting Connected", But Enabling Smooth Business Interoperability

1. Numerous branch surveillance cameras lead to high video backhaul costs
   Stores and subsidiaries usually deploy a large quantity of cameras. In the past, transmitting surveillance footage from all sites back to headquarters required dedicated lines and bandwidth planning. As branch numbers grow, network pressure and line costs for video backhaul keep rising.
2. Headquarters notification distribution lacks flexible audio and video scheduling
   Corporate headquarters needs not only to view branch sites remotely but also centrally manage remote branches. For instance, headquarters sends voice alerts, broadcasts content to all stores, or schedules audio and video resources across branches. If local networks operate independently, these cross-regional services often require additional standalone systems and deliver inconsistent user experience.
3. Remote office resources cannot be shared efficiently
   When headquarters servers, files, applications and other office resources are distributed across locations, branch employees frequently need to access headquarters resources. Under traditional network architecture, there is no unified interconnection tunnel between branches. Resource sharing is easily constrained by link quality and network configurations.

II. SD-WAN + All-Optical Network: Truly Unify Multiple Branches on One Network

To meet cross-region networking demands for multi-store and multi-subsidiary enterprises, Zhihui Guangxun leverages SD-WAN to build a virtual private network between headquarters and branches. Secure and stable interconnection tunnels are established over ordinary broadband. Enterprises do not need costly dedicated lines for every branch, and reliance on static public IPs is reduced.

1. Unified backhaul of branch surveillance with centralized viewing at headquarters
   Video surveillance from each branch accesses the local all-optical network, then SD-WAN transmits video traffic to headquarters. Headquarters can retrieve video resources from remote branches centrally without individually connecting to networks at each location.

For scenarios with massive camera points such as stores, campuses and warehouses, this method consolidates geographically dispersed video resources into one unified network. It enables centralized viewing for headquarters and eliminates the need to deploy complex separate cross-region transmission networks for each branch.

1. Centralized audio and video scheduling from headquarters, delivering notifications directly to branches
   Beyond video backhaul, SD-WAN also handles audio and video interconnection between headquarters and branches. Headquarters can centrally schedule audio and video resources across different branches and push notifications and broadcasts to corresponding stores or subsidiaries according to business requirements.

In other words, the network does not merely transfer data. It further supports unified business scheduling of remote branches by headquarters, enabling true collaboration among multi-site branches at the network layer.

1. Cross-region sharing of headquarters resources, with office access as if on a single LAN
   Resources such as headquarters servers, files and business systems can be opened for remote branch access through SD-WAN. Employees, whether at headquarters or branches, can access authorized office resources.

For chain enterprises, there is no need to build a complete set of IT infrastructure for every store. Headquarters deploys resources centrally, and branches use them on demand. This eliminates redundant construction and simplifies fast onboarding when new branches are added later.

III. All-Optical Network for Local Services, SD-WAN for Cross-Regional Interconnection

SD-WAN addresses "how headquarters connects with branches", while the all-optical network handles "how the internal branch network is built".

Zhihui Guangxun’s F5G all-optical network carries local branch services including office work, surveillance, access control, audio and video over a single fiber. Fiber supports longer transmission distances and reduces intermediate devices and cabling complexity found in legacy copper networks. SD-WAN interconnects all branches, forming a network architecture of local all-optical access + cross-region SD-WAN interconnection.

For multi-branch enterprises, the value of this solution is not simply replacing dedicated lines with broadband. It integrates headquarters, branches, local endpoints and cross-region services into one unified network.

Meanwhile, SD-WAN supports intelligent scheduling across multiple links. When latency, packet loss or other anomalies occur on a line, traffic is switched according to business needs to stabilize video backhaul, audio/video scheduling and office access.

For scenarios with strict data security requirements, the converged connectivity-security concept can be further adopted. Communication networks are designed alongside cryptographic security capabilities to protect critical data transmitted across regions. Multi-branch interconnection achieves low cost without compromising data transmission security.

From branch video backhaul and headquarters audio-video scheduling to remote office resource sharing, SD-WAN helps enterprises connect networks across cities and stores without massive investment in high-cost dedicated lines. Combined with the unified carrying and management capabilities of Zhihui Guangxun all-optical networks, enterprises can support more branches with a lightweight network architecture, delivering low-cost scaling, unified interconnection and centralized management.

For expanding chain stores, group corporations and multi-area campuses, networking priorities have shifted beyond "providing network access at every site" to integrating all branches into one cohesive network.

FAQ

Q: Without public IPs, how can headquarters access surveillance cameras at branch stores?
A: Zhihui Guangxun SD-WAN uses intelligent virtual tunnel technology to bring branch stores and headquarters into the same virtual LAN. Store cameras function as if they are within the headquarters local area network and can be directly detected by headquarters NVR and monitoring platforms. No public IP or port mapping is required.

Q: Is ordinary broadband stable enough?
A: SD-WAN embeds an intelligent path selection algorithm that continuously monitors latency and packet loss across multiple broadband links and automatically selects the optimal path. Multi-link backup is supported; traffic fails over to healthy links within milliseconds if any line malfunctions. Ordinary broadband delivers performance comparable to dedicated lines.

Q: Is cross-provincial data transmission secure?
A: SD-WAN tunnels adopt SM cryptographic encryption under IPsec. Captured packets over the public network cannot be parsed to retrieve raw data. The PON fiber optical path inside stores adds hardware encryption, forming double-layer protection.