Network Modernization in Emerging Markets: Common Goals, Different Roadblocks
Telecom modernization is no longer a question of “if,” but “how soon.”
Across the globe, operators are moving their voice networks from circuit-switched TDM to packet-based IP.
In emerging markets like Africa and Latin America, this shift carries even more weight. These regions are some of the fastest-growing mobile and broadband markets in the world. Brazil alone has more than 200 million mobile subscribers. Growth at this scale puts tremendous pressure on operators to expand voice and data services quickly, securely, and cost-effectively.
The challenge?
Traditional TDM systems weren’t built to scale at today’s pace. That’s why modernization in these regions is both urgent and complex: a balancing act between upgrading to IP and maintaining reliability for millions of subscribers.
Let’s look at three of the most common roadblocks operators face, and how they’re finding ways forward.
Roadblock #1: Budget Pressures
Every operator must manage costs, but when capital has to stretch across large territories with limited infrastructure, and rapidly growing subscriber bases, tough choices are inevitable. In such cases, investments in less flexible and expensive legacy voice systems are harder to justify.
And it’s not just about the hardware budget. Time is an equally important factor. Complex customization and integration work can drain scarce engineering resources. Solutions that are designed to integrate with existing infrastructure using standard interfaces and more straightforward configuration require less effort to deploy and interconnect, and reduce dependence on scarce legacy expertise.
Roadblock #2: Fraud Exposure
Fraud is a universal problem, but its impact depends heavily on local regulations. In countries where frameworks are strong and unified, countermeasures can be applied consistently. Brazil’s adoption of STIR/SHAKEN is a recent example, driven by the sharp rise in spam and fraudulent calls.
In markets where regulations are still fragmented, fraudsters often find more room to exploit gaps. For operators growing quickly in these environments, the challenge is clear: secure networks that are growing rapidly while working within uneven or still-shifting regulatory protections.
Roadblock #3: Legacy Realities
Despite the global push toward IP, legacy systems remain essential. Copper and TDM are still in place in many regions, and they won’t disappear overnight. Operators need to extend the life of these assets while keeping them interoperable with modern SIP environments.
Flexible, cost-efficient gateways are proving critical here. By deploying gateways closer to subscribers in regions where TDM is predominant, operators can convert calls from TDM to SIP at the network edge. This reduces the distance where expensive copper lines are required, lowering costs while still ensuring reliable voice services.
IMS: Defining the Core of Modernization
One of the most important enablers of modernization — in both emerging and established markets — is IMS (IP Multimedia Subsystem).
IMS isn’t just about voice. It’s a standardized framework that allows different types of services (voice, video calling, messaging, presence, and more) to interconnect cleanly across networks. For voice specifically, IMS provides the foundation that enables mobile and fixed-line networks to interoperate, while still supporting essential functions such as emergency calling.
In practice, IMS offers two big advantages:
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Modularity: Operators can add or replace components without disrupting the whole system.
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Interoperability: Clear specifications make it easier for equipment from different vendors to work together.
Session Border Controllers (SBCs) play a vital role in this architecture. Acting as secure interfaces to IMS cores, SBCs help operators manage interoperability, enforce policies, and maintain the scalability and flexibility needed to align with global standards.
The Balance Between Old and New
For operators in emerging markets, modernization is rarely a clean break. It’s about protecting existing investments while preparing for what’s next. That means:
- Maintaining installed bases with certified, supported equipment.
- Enabling interconnection with rapidly expanding mobile networks.
- Supporting voice services across both fixed and mobile environments.
- Adding fraud protection at every layer — because threats target both old and new infrastructure.
The goal isn’t to abandon the past or leap recklessly into the future, but to balance between both.
Moving Forward Together
While every market has its own challenges, the destination is the same: reliable, secure, and interoperable voice services in an IP-first world.
Emerging markets like Mexico, Brazil, India, and South Africa may face tighter budgets, heavier reliance on legacy systems, and greater fraud exposure. But these pressures also create urgency and spark innovation in how modernization is achieved.
At TelcoBridges, we see this first-hand with our partners and customers worldwide. Whether through ProSBC for IP scaling and fraud protection, or Tmedia gateways for efficient legacy integration, our role is to provide solutions that make modernization achievable without requiring disruptive, all-at-once upgrades.
The good news? With the right mix of efficient solutions, every operator can stay on course of keeping voice reliable, secure, and fully interoperable.
Example: Paratus
Paratus, a pan-African operator active in multiple countries, faced the challenge of expanding services cost-effectively while working within infrastructure constraints. By deploying TelcoBridges SBCs and media gateways, they were able to interconnect reliably and migrate to SIP without disrupting customers.
For more details, read the full Paratus Case Study.
Want the Full Conversation?
For a deeper dive into how modernization is playing out across growing regions, from the pressures of budgets and fraud to the role of IMS and legacy integration, check out our latest podcast episode.
