By 
By Warren Alberts, Chief Executive Officer at VAS-X
For most telcos, business support systems (BSS) are massive cost centres. This is, in large part, because a BSS is made up of various components that underpin virtually every customer-facing function, from billing and invoicing to collections, ticketing and CRM. This complexity makes modernisation a daunting task and explains why telcos often hesitate to replace or overhaul these systems.
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Not only is it costly and time-consuming to swap out your BSS but it’s also risky. A failed migration isn’t just an IT problem, it’s a potential business crisis, affecting service, revenue and reputation. Within the average BSS, each module is tightly integrated with others so even a small change can have ripple effects across critical operations.
Sticking with a legacy BSS can constrain a telco’s growth
But sticking with a legacy BSS can quietly constrain a telco’s growth, agility, and customer experience. While these systems might be stable, a legacy BSS often works too rigidly, limiting the operator’s ability to evolve as quickly as the competition.
Warren Alberts
Launching new products and offers can take months instead of weeks because an older BSS is often heavily customised and thus more difficult to modify without extensive testing and downstream changes. Where modern systems are built for agility and immediacy, a legacy BSS can’t support real-time interactions and omnichannel journeys.
Let’s imagine an enterprise client wants to open a sponsored account for specific employees. A legacy BSS will struggle to set this up because these platforms weren’t designed to handle multi-party billing, real-time usage tracking, or flexible limits and notifications, which are essential for sponsored accounts.
Similarly, setting up self-service offerings, which empower customers to manage their accounts, services, and issues independently, is possible but incredibly difficult with a legacy BSS.
Innovation in the front, legacy in the back
Given these realities, a common strategy sees operators upgrading the front end of a BSS while keeping the backend intact. This approach makes it possible to improve the user interface and the customer experience without disrupting core billing, service assurance, or revenue critical systems.
By modernising and updating the customer facing portal, operators can unlock new capabilities without making a massive change on the backend. And customers immediately benefit from a more modern, attractive experience.
This strategy also avoids the high cost and potential risks associated with a BSS ‘rip and replace’. By adopting a modular, phased approach to BSS modernisation, telos can introduce new functionality incrementally.
In addition, front-end modernisation often involves API layers that can connect legacy BSS to new services, digital ecosystems, or partner platforms. This opens up opportunities for new revenue streams and digital partnerships without backend disruption.
Modernising BSS doesn’t mean tearing everything down and starting over
For CTOs and CIOs, the message is clear: modernising your BSS doesn’t mean you have to tear everything down and start over. Legacy systems, while rigid and complex, provide the stability and reliability needed to keep revenue flowing and critical operations running.
By layering new technology on top of your existing BSS, you can introduce innovation safely, one step at a time. This approach allows you to roll out new customer experiences, self-service capabilities, or sponsored account features without risking downtime or revenue leakage.
In essence, you’re renovating rather than rebuilding: keeping the strong foundations that work while adding flexibility, agility, and modern functionality where it counts.
