AV-over-IP & Hardware-Agnostic CMS for DOOH Scaling

The Architectural Shift in Enterprise DOOH

Scaling a synchronized Digital Out-of-Home (DOOH) network used to require massive upfront capital, often making the barrier to entry insurmountable for independent operators and regional venue owners. A decade ago, deploying a multi-screen network across a shopping mall or transit hub meant allocating hundreds of thousands of dollars before a single advertisement could be served.

Historically, network operators relied on proprietary media players, expensive physical video wall processors, and closed-ecosystem software. This legacy approach created vendor lock-in and bloated hardware budgets. If a hardware component failed, operators were forced to purchase expensive proprietary replacements, and if a software vendor raised their licensing fees, the operator had no choice but to pay or face the catastrophic cost of ripping and replacing their entire infrastructure. Maintenance required specialized technicians, and scaling the network meant a linear, predictable, and painful increase in capital expenditure.

Today, the landscape has fundamentally changed. The convergence of high-speed networking, advanced system-on-chip (SoC) technology, and cloud-native software has completely rewritten the economics of digital signage.

With 26,000+ DOOH screens under contract, Trillboards is witnessing a massive architectural shift in how enterprise media networks are built. Modern networks are replacing physical hardware with software-defined architectures. This is not merely a theoretical shift; it is happening at a breakneck pace across retail, hospitality, transit, and corporate environments globally.

By leveraging AV-over-IP digital signage and a hardware agnostic CMS, CTOs and network architects are dramatically lowering Total Cost of Ownership (TCO). This transition unlocks massive DOOH CAPEX reduction while enabling programmatic monetization at scale. Instead of viewing screens as passive cost centers, modern infrastructure transforms them into active, yield-generating assets from day one.

This technical deep-dive explores the infrastructure required to scale modern DOOH networks, from Ethernet-based synchronization to API-first programmatic ad serving. We will examine the precise mechanisms that allow software to replace hardware, the data architecture required to satisfy programmatic buyers, and the deployment strategies that are defining the next decade of digital out-of-home media.

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Decoupling Hardware: The Rise of AV-over-IP

To scale without friction, operators must eliminate step-cost physical installations. In traditional AV design, scaling a video wall from four screens to five meant abandoning a 4-port matrix switcher and purchasing an 8-port matrix switcher,a massive leap in cost for a minimal increase in screen real estate. This rigid, hardware-bound topology is no longer viable for agile enterprise deployments.

Industry body AVIXA highlights that AV-over-IP digital signage leverages standard IT Ethernet networks, commercial off-the-shelf (COTS) switches, and software-based routing to turn physical installations into highly scalable, linear models. By utilizing the same network infrastructure that powers corporate Wi-Fi and VoIP phones, DOOH networks can piggyback on existing IT investments.

This approach routes video, audio, and control signals over standard IP networks rather than dedicated HDMI, DisplayPort, or proprietary matrix switchers. Instead of pulling heavy, distance-limited HDMI cables through ceilings and walls, integrators can utilize standard Cat6 or fiber optic cabling, allowing displays to be placed virtually anywhere on the local area network (LAN) without signal degradation.

The Mechanics of Ethernet Screen Synchronization

Synchronizing multiple displays across a vast network,such as an airport terminal or a large hotel lobby,is a complex distributed systems problem. When a single high-motion video, like a car driving horizontally across a 1x4 video wall, is displayed, even a millisecond of delay between screens will result in aggressive visual tearing, instantly ruining the premium feel of the installation.

In legacy setups, this required a physical video wall processor to split a single video signal across multiple screens. These processors were essentially expensive, single-purpose computers dedicated solely to pixel mapping. Today, Ethernet screen synchronization handles this via software and network protocols, completely bypassing the need for dedicated splitting hardware.

To achieve frame-accurate synchronization across disparate endpoints, modern AV-over-IP systems rely on Precision Time Protocol (PTP), specifically IEEE 1588. Unlike standard Network Time Protocol (NTP), which only guarantees accuracy to the millisecond, PTP utilizes hardware-level timestamping at the network interface layer.

PTP allows devices on an Ethernet network to synchronize their internal clocks to within sub-microsecond accuracy. When a central server sends a video multicast stream, each receiving System-on-Chip (SoC) display buffers the incoming frames in its local memory.

The displays then use their PTP-synchronized clocks to render the exact same frame at the exact same microsecond, eliminating visual tearing without a central hardware processor. Because the synchronization logic is decoupled from the video delivery, the system becomes infinitely scalable. Adding a 5th, 10th, or 50th screen to the synchronized cluster simply requires plugging it into the network and subscribing it to the PTP master clock.

Multicast Routing and IGMP Snooping

Pushing 4K video to dozens of screens simultaneously requires efficient network topology. A single uncompressed 4K video stream can consume massive amounts of bandwidth. Even with modern HEVC (H.265) compression, delivering high-fidelity video across a network requires careful traffic management.

Unicast streaming (sending a separate stream to each display) quickly saturates network bandwidth. If a 25 Mbps stream is sent to 40 screens via unicast, the network must handle 1,000 Mbps of continuous traffic, choking the switch and degrading performance for other corporate applications. Instead, AV-over-IP relies on multicast routing.

With multicast, the source sends a single video stream to a specific IP address. The network switches then replicate that stream only to the ports where displays have requested it. This means that whether you are streaming to one screen or one hundred screens, the bandwidth leaving the source server remains exactly 25 Mbps.

Technical Requirement: To prevent multicast traffic from flooding the entire corporate network,a phenomenon known as a broadcast storm, which can easily crash enterprise routers,enterprise switches must implement IGMP (Internet Group Management Protocol) Snooping. This ensures video packets are only routed to the specific digital signage endpoints that have actively joined the multicast group, preserving bandwidth for the rest of the LAN.

As noted by Datapath in their industry analysis, this transition to IP-based routing is fundamentally changing digital signage networks by allowing limitless scalability on standard IT infrastructure. It bridges the historical gap between the AV integrator and the IT department, unifying them under standard networking protocols.

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The Role of a Hardware Agnostic CMS

Complementing AV-over-IP infrastructure is the transition to a hardware agnostic CMS (Content Management System). The CMS is the brain of the digital signage network, responsible for scheduling, rendering, and reporting on the content displayed on the screens.

In the past, choosing a CMS meant committing to a specific hardware ecosystem. If you chose BroadSign, you needed expensive Windows or Linux media players, adding hundreds of dollars in hardware costs per endpoint. If you chose a proprietary SoC solution, you were locked into Samsung Tizen or LG WebOS, meaning you could never mix and match screen brands without running multiple, siloed CMS dashboards.

A hardware-agnostic approach abstracts the operating system layer entirely. By treating the screen as a dumb glass terminal that simply executes standardized web code, network operators regain total control over their procurement strategy.

Abstracting the OS Layer

Trade platform SignageOS notes that standardizing the API layer protects CAPEX by allowing displays to serve their full depreciation lives. In corporate accounting, digital displays are typically amortized over a 5 to 7-year period. However, if a proprietary CMS vendor deprecates support for an older OS version, operators are often forced into premature hardware refreshes.

Instead of undergoing expensive hardware refreshes every few years, operators can mix screen brands (such as Samsung, LG, or Android players) and swap CMS vendors remotely over the network. If a better software solution enters the market, the IT team can simply push a new web application payload to the screens without rolling a single truck to physically touch the hardware.

Modern hardware-agnostic platforms utilize cross-platform runtimes, often based on embedded Chromium frameworks or WebAssembly (Wasm). These technologies allow complex logic, including transitions, local caching, and programmatic bidding, to run at near-native speeds regardless of the underlying hardware architecture.

This allows the CMS application to run as a lightweight web app directly on the display's native SoC hardware, bypassing the need for an external media player. The result is a cleaner physical installation (no external boxes taped to the back of the TV), fewer points of failure (no HDMI cables to come loose), and a drastically reduced power footprint.

Memory Management and Device Health

Running high-fidelity HTML5 content on embedded SoC devices requires rigorous memory management. While modern web technologies are powerful, they are also notoriously resource-intensive if not optimized correctly.

Unlike a desktop PC, a smart TV SoC might only have 2GB of RAM. A hardware-agnostic CMS must aggressively garbage-collect DOM elements and manage hardware-accelerated video decoding to prevent memory leaks and kernel panics. If a CMS application continuously injects new video tags into the DOM without properly destroying the old ones, the 2GB memory limit will be breached within hours, resulting in a black screen, a frozen frame, or a hard crash that requires a manual power cycle.

Through robust Remote Device Management (RDM) APIs, these CMS platforms monitor device health, CPU temperature, and memory consumption in real-time, executing remote reboots via webhooks if thresholds are breached. This proactive self-healing architecture is what allows enterprise networks to maintain the 99.99% uptime required by premium advertisers.

Industry analyst Mordor Intelligence underscores this trend, noting that subscription cloud CMS solutions trim CAPEX, driving a market forecast to reach $7.42 billion by 2031. As more operators realize the financial benefits of hardware abstraction, the market for proprietary, locked-down media players will continue to shrink.

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Programmatic DOOH Infrastructure: The Revenue Layer

While AV-over-IP and a hardware agnostic CMS solve the cost side of the equation by drastically lowering deployment and maintenance expenses, programmatic DOOH infrastructure solves the revenue side. Cost savings alone do not build a profitable media network; operators must have a seamless pipeline to global advertising demand.

Historically, digital signage software companies (like ScreenCloud or OptiSigns) provided CMS capabilities but offered no native path to monetization. They were built purely as internal communication tools or simple looping playlist managers. If a venue owner wanted to sell ads, they had to hire a direct sales team, manually traffic the creative files, and manually generate Excel-based proof-of-play reports.

Trillboards bridges this gap by acting as a next-generation Supply-Side Platform (SSP) and free ad server for digital signage publishers. It transforms a standard digital signage network into a fully automated, programmatic media exchange.

Unlike building your own SSP,which can easily incur $500K+ in development costs to handle high-concurrency bidding, DSP integrations, and strict latency requirements,Trillboards provides programmatic infrastructure-as-a-service via its Partner SDK (@trillboards/ads-sdk). This allows developers to embed enterprise-grade ad-serving capabilities into their existing applications with just a few lines of code.

OpenRTB 2.6 and the VAST Waterfall

Trillboards operates an OpenRTB 2.6 exchange, fully integrating with Google Ad Manager (GAM) and dozens of Demand-Side Platforms (DSPs) such as The Trade Desk, Yahoo DSP, and Vistar Media. OpenRTB 2.6 introduced critical features for DOOH, such as ad podding, which allows a single bid request to represent a sequence of multiple ads, perfectly mirroring the traditional digital signage "loop."

When a screen approaches an ad break, the Trillboards SDK initiates a bid request. This request utilizes the IAB OpenOOH venue taxonomy to describe the physical environment of the screen. Whether the screen is in a "Gym/Health Club," a "Doctor's Office," or a "Convenience Store," this standardized metadata allows buyers to precisely target their desired consumer context.

Trillboards executes a multi-demand-source VAST waterfall, utilizing a second-price auction engine to maximize yield for the publisher. If the highest bidder fails to return a valid VAST XML payload, or if the creative times out, the system automatically falls back to the next highest bidder, ensuring the ad slot is never left blank and revenue is never left on the table.

Key Insight: Programmatic ad revenue is split 60/40 in the publisher's favor: the venue/publisher keeps 60%, Trillboards keeps 40%. This aligns the incentives of the platform with the success of the network operator.

This model is revolutionary because Trillboards is entirely free for publishers. Publishers pay $0/screen/month, whereas legacy competitors charge $5-45/screen/month just for software licensing. By removing the monthly SaaS fee, operators can scale their networks faster, using their programmatic yields to fund further hardware deployments.

Supply Chain Validation & Brand Safety

Enterprise advertisers demand total transparency in the programmatic supply chain. In the broader digital advertising world, ad fraud, spoofing, and Made-For-Advertising (MFA) sites have cost brands billions. DOOH must offer a cleaner, more secure alternative to command premium CPMs.

To ensure inventory quality, Trillboards executes a rigorous 14-check OpenRTB 2.6 supply-chain validation runbook on every transaction. This includes real-time validation of sellers.json, ads.txt, and schain objects. These cryptographic checks guarantee to the DSP that the inventory being purchased is genuinely owned by the publisher and that Trillboards is an authorized seller of that inventory.

Furthermore, the platform has performed 234,312 creative-level classifications across 48 IAB Content Taxonomy top-level categories. Every piece of creative that enters the Trillboards exchange is scanned, categorized, and vetted for compliance.

This ensures that a family-friendly hotel lobby never displays an age-restricted advertisement, maintaining strict brand safety at the edge. Venue owners can set granular blocklists, ensuring that competitor ads (e.g., a Pepsi ad in a Coca-Cola sponsored stadium) or inappropriate content (e.g., alcohol, gambling, or political ads) are programmatically rejected before they ever reach the screen.

SDK Implementation Example

Integrating the Trillboards SDK into a React-based hardware-agnostic CMS is straightforward. The SDK is designed to be developer-friendly, utilizing modern React hooks and context providers to manage the complex state of programmatic bidding behind the scenes.

Here is a conceptual implementation of how a developer initializes the programmatic revenue layer:

import { TrillboardsProvider, AdSlot } from '@trillboards/ads-sdk';

const DOOHPlayer = () => {
  return (
    <TrillboardsProvider 
      apiKey="pub_live_xxxxx" 
      venueId="ven_xxxxx" 
      deviceId="dev_xxxxx"
    >
      <div className="screen-layout">
        {/* Primary CMS Content Zone */}
        <div className="content-zone">
          <CMSPlaylistRenderer />
        </div>
        
        {/* Programmatic Monetization Zone */}
        <div className="ad-zone">
          <AdSlot 
            width={1920} 
            height={1080} 
            refreshRate={15000} 
            fallback={<DefaultHouseAd />}
            onImpression={(data) => trackOMSDKViewability(data)}
          />
        </div>
      </div>
    </TrillboardsProvider>
  );
};

This native integration eliminates the need for external ad-serving hardware, executing the auction and rendering the VAST creative directly within the SoC's browser environment. The TrillboardsProvider handles the session authentication and background telemetry, while the AdSlot component manages the 15-second (refreshRate={15000}) rotation, automatically fetching new bids and pre-caching video assets to ensure seamless playback without buffering.

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Achieving Massive DOOH CAPEX Reduction

Migrating to software-defined environments transitions hardware budgeting from rigid CAPEX to a flexible OPEX refresh cycle. By removing the heavy upfront costs of proprietary hardware, operators can deploy networks faster and achieve ROI significantly earlier in the project lifecycle.

As noted by Invidis, this shift aligns digital signage deployments with standard corporate IT schedules, drastically reducing the financial barrier to entry for large-scale networks. Instead of treating digital signage as a specialized, isolated AV project, it becomes just another endpoint on the corporate network, managed by the same tools and teams that handle laptops and servers.

By eliminating external media players, physical video wall processors, and proprietary CMS licensing fees, network operators can reduce initial deployment costs by up to 70%. This massive reduction in CAPEX allows operators to reallocate funds toward higher-quality displays, better content creation, or simply expanding their network footprint faster than previously possible.

We see this architecture deployed successfully in specialized retail environments, as VapeTM demonstrates with their smart vending machines with digital displays and advertising screens. In the automated retail sector, internal space and thermal management are critical constraints. Adding a bulky PC to a vending machine is physically and economically unviable.

By embedding the programmatic ad layer directly into the vending machine's native firmware, operators avoid the cost of retrofitting external players while instantly unlocking new revenue streams. The screen serves a dual purpose: facilitating the consumer transaction and serving highly targeted, programmatic advertisements during idle states.

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Data Architecture and Audience Measurement

To command premium eCPMs from DSPs, a programmatic DOOH network must provide highly granular audience intelligence. Media buyers no longer purchase screens; they purchase audiences. If a network cannot mathematically prove who is standing in front of the screen, buyers will simply route their budgets to mobile or CTV inventory where measurement is standardized.

Trillboards processes massive amounts of environmental data to facilitate these transactions. The platform currently supports 1,558 IAB Audience Taxonomy 1.1 nodes in its OpenRTB requests, and has observed 645 IAB audience segments in live impressions over the past 60 days. This level of granularity allows buyers to target highly specific cohorts, from "Business Travelers" to "Health-Conscious Consumers."

The data collection architecture operates under strict, specific parameters to power this intelligence, balancing the need for deep analytics with rigorous consumer privacy standards.

Environmental Sensing and Identity Resolution

Screens measure the people and devices near them using advanced edge-computing sensors. A screen keeps a record for each person its camera detects: estimated age range, gender, dominant emotion, dwell time and time spent looking at the screen. This attention-metric data is incredibly valuable to advertisers, as it proves not just that an ad was played, but that it was actively consumed.

On the full sensing profile it also computes a face-identity template (a vector of 512 numbers) that Trillboards uses to recognise the same person across screens and days. This mathematical representation cannot be reverse-engineered into a photograph, ensuring privacy by design. Furthermore, Trillboards links each person to the device keys of the phones seen with them and to mobile advertising IDs. This omnichannel identity resolution allows advertisers to retarget consumers on their mobile devices after they have been exposed to a DOOH advertisement, closing the loop on campaign attribution.

Cloud Processing and Retention

Selected camera frames go to a cloud model (Google Vertex AI) that estimates ethnicity, age band, gender, social composition, purchase-intent stage, activity, attire, carried items, lifestyle segments and mood. By leveraging enterprise-grade machine learning models, the network can dynamically adapt its ad serving. For example, if the system detects a high concentration of consumers carrying gym bags, it can instantly trigger sports apparel advertisements.

Trillboards keeps those frames for 400 days, and the frames captured between 5 May and 21 June 2026 are kept as a model-evaluation set with no scheduled deletion. This structured retention policy allows for continuous retraining and refinement of the AI models, ensuring accuracy improves over time. Speech is transcribed on the device and Trillboards stores the transcript to understand the contextual environment of the venue. Crucially, to maintain strict privacy compliance, no video or audio recording is stored or transmitted,only the anonymized metadata and text transcripts are retained.

Network Signals and Data Syndication

Screens send Trillboards the Bluetooth, Wi-Fi and local-network identifiers nearby phones broadcast, and their GPS position; Trillboards turns radio and GPS sensing on by default. This multi-sensor approach creates a highly accurate geofence around the screen, capturing the MAC addresses of devices that enter the viewable area.

Bid requests carry the screen's IP address, location and live audience measurements. Call the companies that receive bid requests DOOH exchanges and demand-side platforms. By enriching the bid request with real-time, deterministic data, Trillboards elevates the value of the inventory far above standard, static DOOH placements.

Trillboards sells and shares audience measurement and location data with its data partners, including 375ai and Intuizi. This syndication creates an additional data-monetization layer for the network, providing value to the broader ad-tech ecosystem even when an ad is not actively playing.

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Event-Driven Architecture and API Tiers

Managing a fleet of thousands of screens requires robust backend infrastructure. Traditional digital signage systems relied on continuous polling,where every screen asks the server "Do I have an update?" every few minutes. At scale, polling creates massive, unnecessary server load and introduces latency into the network.

Trillboards utilizes a webhook-driven event architecture. Instead of continuously polling the API for device status, publishers register webhook endpoints to receive real-time POST requests. This push-based model is highly efficient and ensures that network operators are notified of critical changes the millisecond they occur.

These webhooks fire for critical network events, including device heartbeats, VAST rendering errors, impression validations via the OM SDK (Open Measurement), and real-time audience spikes. If a screen goes offline, or if an ad fails to render due to a corrupted video file, the IT team is alerted instantly, allowing for rapid triage and minimal revenue loss.

OpenAPI Specification and Tiers

Trillboards offers a full REST API for device, audience, venue, and analytics management, documented via an OpenAPI spec with a Swagger UI available at /developer/docs. This allows enterprise development teams to interact with the platform using standardized HTTP requests, generating client libraries in their preferred programming languages automatically.

The platform scales alongside publisher needs through three distinct API tiers:

1. Basic: 200 requests per minute. Ideal for standard CMS integrations and smaller venue networks that only need to sync playlists and pull daily revenue reports.
2. Developer: 1,000 requests per minute. Unlocks deep venue intelligence and advanced audience querying, allowing mid-sized networks to build custom dashboards and real-time alerting systems.
3. Enterprise: 5,000 requests per minute. Provides raw data exports, dedicated SLAs, and priority support for massive global deployments. This tier is designed for operators pushing high-frequency programmatic data into their own data lakes.

This API-first approach allows enterprise IT teams to seamlessly integrate Trillboards into their existing NOC (Network Operations Center) dashboards and ERP systems. Instead of logging into a separate, siloed portal, operators can view their DOOH network health alongside their server uptime and network bandwidth metrics in tools like Datadog or Grafana.

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Viewability and MRC Compliance

In the programmatic ecosystem, an ad impression is only valuable if it can be independently verified. Buyers will not pay premium rates for "opportunities to see"; they demand cryptographic proof that their ad was actually delivered to a human audience.

Trillboards integrates the IAB Tech Lab's OM SDK (Open Measurement Software Development Kit) directly into its rendering pipeline. This ensures that every programmatic impression is MRC-compliant (Media Rating Council). The OM SDK acts as an impartial third-party observer running inside the browser environment, monitoring the exact pixel rendering of the advertisement.

The OM SDK measures precise viewability metrics, confirming that the ad actually rendered on the screen, was not obscured by other UI elements (such as an overlapping weather widget or a broken CSS layout), and played for the required duration (e.g., a full 15 seconds without being skipped or interrupted).

This cryptographic proof of play is passed back to the DSPs in real-time, building trust and driving higher bid densities in the OpenRTB auction. When buyers know that their budgets are protected by MRC-compliant measurement, they are willing to bid higher, directly increasing the yield for the venue owner.

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Deploying in Specialized Venues

The flexibility of this software-defined architecture allows for rapid deployment across highly specialized venue types. Because the system does not rely on rigid hardware configurations, it can adapt to the physical and environmental constraints of virtually any location.

Whether you are managing a network of smart TVs in a corporate office, deploying ruggedized, high-brightness displays in an auto repair shop, or integrating screens into luxury retail fixtures, the underlying infrastructure remains identical. The software handles the complexity, allowing the hardware to be tailored specifically to the venue's aesthetic and environmental needs.

For operators looking to model the financial impact of deploying this architecture in hospitality environments, reviewing a comprehensive guide on hotel deployments can clarify the OPEX benefits. Hotels, with their mix of lobby screens, elevator displays, and in-room TVs, represent the perfect use case for a unified, hardware-agnostic, programmatic network.

By leveraging the OpenAPI taxonomy and the hardware-agnostic SDK, venue owners can instantly classify their inventory and make it discoverable to global ad buyers without writing complex integration code. A screen in a hotel gym can be tagged and monetized entirely differently than a screen at the hotel bar, maximizing the contextual value of every single endpoint.

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Conclusion: The Future is Software-Defined

The era of expensive, proprietary digital signage hardware is over. The industry has reached an inflection point where relying on closed ecosystems is no longer just a technical limitation; it is a profound competitive disadvantage.

By embracing AV-over-IP networking and hardware-agnostic CMS platforms, operators can achieve massive scale while protecting their capital expenditures. The transition from physical matrix switchers and dedicated media players to standard IT infrastructure, Ethernet synchronization, and lightweight web runtimes is democratizing the creation of enterprise media networks.

When combined with Trillboards' programmatic DOOH infrastructure, this architecture transforms passive glass into an active, high-margin revenue stream. Network operators are no longer just managing screens; they are managing highly intelligent, data-rich programmatic endpoints that connect physical venues to global advertising demand.

With zero monthly licensing fees, enterprise-grade APIs, and a transparent 60/40 revenue split, Trillboards provides the ultimate foundational layer for the next generation of digital out-of-home media. By removing the financial friction of legacy software and automating the complex mechanics of OpenRTB bidding, Trillboards empowers publishers to focus on what matters most: growing their footprint and maximizing their yield.

Ready to transform your network architecture and unlock programmatic demand?

Explore our API documentation, review our integration guides, and start monetizing your screens today. The tools to build a highly profitable, software-defined DOOH network are already at your fingertips.