Key Takeaways

  • For retailers evaluating platforms from Sansay, Inc. and other providers, session control functions as a shared security, interoperability, and customer-experience layer across stores, contact centers, unified communications as a service (UCaaS), and Session Initiation Protocol (SIP) services.
  • Retail buyers should assess platforms against actual call flows, failure conditions, fraud exposure, and available operational skills rather than feature lists alone.
  • Buyers assessing SBC providers should treat Secure Telephone Identity Revisited and Signature-based Handling of Asserted Information Using toKENs (STIR/SHAKEN) as one layer of caller-identity assurance; uneven adoption still requires layered trust policies and active traffic management.

A session border controller (SBC) is a policy and security gateway for retail voice traffic. It governs calls moving among stores, cloud contact centers, carriers, callbacks, and Microsoft Teams, where each handoff creates signaling, identity, security, and routing decisions.

SBCs provide a control point for voice-session decisions. They can mediate SIP traffic, secure media, normalize incompatible implementations, support transcoding (the conversion of media between codecs) limit toll fraud, and connect on-premises systems with cloud communications services. Web Real-Time Communication (WebRTC), which enables browser-based audio and video, introduces another set of session and media considerations.

The business case is no longer limited to replacing an aging voice gateway. Retailers are increasingly treating session control as shared infrastructure across customer service, stores, corporate collaboration, and carrier interconnections. Providers including Cisco, AudioCodes, Ribbon, and Sansay, Inc. participate in this broader market.

The appropriate architecture depends on traffic patterns, geographic reach, resilience expectations, security posture, and the operating model behind the technology. Buyers should begin with call-flow discovery and then test shortlisted options under realistic conditions.

Retail voice used to be relatively contained. Stores had local lines, headquarters ran a private branch exchange (PBX), and contact centers operated as distinct systems. Today, those boundaries are fading. UCaaS, SIP trunking, cloud contact centers, mobile applications, WebRTC, and legacy store equipment frequently coexist.

That creates a control problem. Which calls should be admitted? How should phone numbers and SIP headers be rewritten between networks? Where should media encryption begin and end? What happens if a carrier, cloud region, or authentication service becomes unavailable?

Market growth reflects the expanding role of this infrastructure. Fact.MR valued the global SBC market at approximately $0.9 billion in 2025 and forecasts it to reach $2.2 billion by 2036, representing an 8.2% compound annual growth rate. A separate 2026 estimate from The Business Research Company placed the sector’s rise from $0.83 billion in 2025 to $0.91 billion in 2026.

Growth alone does not tell a retailer what to deploy. The more useful question is whether session control can make a fragmented voice estate more secure, observable, and manageable without creating another operational silo.

Retail creates unusual communications peaks. Promotions, product recalls, severe weather, payment issues, and holiday shopping can change call volumes quickly. At the same time, store connectivity may vary widely by location. Some sites retain analog devices or older PBXs while corporate users move to Microsoft Teams Direct Routing and customer care adopts a cloud contact center.

SIP, defined in IETF RFC 3261, provides a shared signaling foundation, but standardized signaling does not guarantee uniform implementation. Carriers and applications can interpret headers, codecs, timers, number formats, and error responses differently. An SBC sits at the network boundary and applies policies that help these environments communicate.

Consider a retail infrastructure director consolidating multiple regional SIP carriers after an acquisition. The first evaluation priority is not maximum session capacity. It is identifying how acquired stores format numbers, route emergency calls, handle local survivability, and connect to corporate systems. Products that cannot provide clear routing policy, tenant separation, or useful diagnostics should fall from the shortlist early. Success means completing the migration without forcing every store onto identical equipment at once.

Security adds another layer. Toll fraud, malformed SIP messages, denial-of-service traffic, spoofed caller identity, and unauthorized registration attempts can all affect voice availability or cost. An SBC can filter traffic, enforce rate limits, hide internal network topology, encrypt signaling and media, and apply destination controls. However, the organization must also assign responsibility for reviewing those policies after deployment. A technically capable platform can still underperform when ownership is vague.

A sound assessment begins with a map of sessions and trust boundaries. Buyers should document inbound and outbound carrier traffic, contact-center paths, Microsoft Teams connectivity, store calling, WebRTC entry points, recording services, emergency calling, and any systems that depend on fax or analog adapters.

Deployment models generally include physical appliances, virtual SBCs, cloud-hosted instances, and managed services. Large retailers may combine them. Centralized control can simplify policy administration, while regional instances can reduce latency and contain failures. Cloud deployment can accelerate expansion, but it also changes responsibility for scaling, availability zones, logging, and software maintenance.

Now consider a consumer-goods contact-center manager moving seasonal support to a cloud platform while retaining an existing carrier contract. That buyer should test transfers, callback identity, recording, codec negotiation, and failover between the cloud service and carrier. A refined management interface has limited value if troubleshooting tools cannot show why calls failed at a particular interconnection. The shortlist should favor platforms that expose signaling traces, media quality, policy actions, and capacity trends in forms operations teams can use.

What happens when the primary cloud contact center remains reachable but its carrier path is degraded? Resilience testing should cover partial failures, not merely complete outages. It should also examine configuration rollback, certificate expiration, Domain Name System (DNS) dependencies, and overload behavior.

Caller identity deserves similar realism. Data from September 2025 shows only 38.0% of observed terminating calls carried STIR/SHAKEN signatures, and 25.7% had full A-level attestation. Stingrai also reported that the Federal Communications Commission’s Robocall Mitigation Database contained 9,242 voice-service providers in September 2025, while about 44% had fully implemented STIR/SHAKEN. Authentication is progressing, but unsigned or partially attested traffic remains common. Blocking every unsigned customer call would be too blunt for most retailers. Reputation data, call context, carrier controls, and fraud analytics can complement identity signals.

Start with a limited production use case and measurable acceptance criteria. Useful measures include call-setup success, post-dial delay, media quality, fraud events, policy-related rejections, failover behavior, and the time required to diagnose incidents.

Configuration governance also matters. Routing rules and header manipulations often accumulate quietly until nobody recalls why they exist. Treat policy changes like application changes: document their intent, test them, approve them, retain prior versions, and monitor the results.

Capacity planning should include concurrent sessions, calls per second, encryption overhead, transcoding demand, recording forks, and seasonal peaks. WebRTC can add browser compatibility, identity, Interactive Connectivity Establishment (ICE), Traversal Using Relays around NAT (TURN), and media-routing questions. Shortcuts in these areas tend to surface during the busiest day of the year, when operational tolerance is lowest.

Session control is moving toward software-based deployment, centralized policy, richer analytics, and closer integration with identity and fraud systems. Enterprises are also likely to demand more consistent management across SIP, WebRTC, UCaaS, and contact-center boundaries.

STIR/SHAKEN adoption should continue, although interconnected networks will retain mixed trust levels for some time. Meanwhile, automation may help identify anomalous routes, sudden call bursts, repeated authentication failures, and deteriorating call quality.

The strategic shift points to a broader trend: SBCs are becoming policy infrastructure rather than isolated telecommunications equipment.

Retail and consumer-goods companies depend on voice at moments that directly affect revenue, safety, and customer trust. Yet the underlying environment increasingly spans carriers, cloud services, store systems, collaboration platforms, and browser-based communications.

A disciplined session-control strategy can help enterprises connect those components while improving security, routing consistency, resilience, and visibility. The evaluation should begin with actual call flows and operational failure scenarios, followed by hands-on testing of interoperability, diagnostics, identity controls, and recovery behavior.

The best-supported decision is rarely the platform with the longest feature list. It is the architecture the organization can understand, operate, and adapt as communications continue to change.