Back in the days when I first started using OSS/BSS software tools, there was no way any respectable telco was going to use open-source software (the other oss, for which I’ll use lower-case in this article) in their OSS/BSS stacks. The arguments were plenty, and if we’re being honest, probably had a strong element of truth in many cases back then.
These arguments included:
- Security – This is the most commonly cited aversion I’ve heard to open-source. Our OSS/BSS control our network, so they absolutely have to be secure. Secure across all aspects of the stack from network / infrastructure to data (at rest and in motion) to account access to applications / code, etc. The argument against open-source is that the code is open to anyone to view, so vulnerabilities can be identified by hackers. Another argument is that community contributors could intentionally inject vulnerabilities that aren’t spotted by the rest of the community
- Quality – There is a perception that open-source projects are more hobby projects than professional. Related to that, hobbyists can’t expend enough effort to make the solution as feature-rich and/or user-friendly as commercial software
- Flexibility – Large telcos tend to want to steer the products to their own unique needs via a lot of customisations. OSS/BSS transformation projects tend to be large enough to encourage proprietary software vendors to be paid to make the requested changes. Choosing open-source implies accepting the product (and its roadmap) is defined by its developer community unless you wish to develop your own updates
- Support – Telcos run 24x7x365, so they often expect their OSS/BSS vendors to provide round-the-clock support as well. There’s a belief that open-source comes with a best-effort support model with no contracted service obligations. And if something does go drastically wrong, that open-source disclaims all responsibility and liability
- Continuity – Telcos not only run 24x7x365, but also expect to maintain this cadence for decades to come. They need to know that they can rely on their OSS/BSS today but also expect a roadmap of updates into the future. They can’t become dependent upon a hobbyist or community that decides they don’t want to develop their open-source project anymore
Luckily, these perceptions around open-source have changed in telco circles in recent years. The success of open-source organisations like Red Hat (acquired by IBM for $34 billion on annual revenues of $3.4 billion) have shown that valuable business models can be underpinned by open-source. There are many examples of open-source OSS/BSS projects driving valuable business models and associated professionalism. The change in perception has possibly also been driven by shifts in application architectures, from monolithic OSS/BSS to more modular ones. Having smaller modules has opened the door to utilisation of building block solutions like the Apache projects.
So let’s look at the same five factors above again, but through the lens of the pros rather than the cons.
- Security – There’s no doubt that security is always a challenge, regardless of being open-source or proprietary software, especially for an industry like OSS/BSS where all organisations are still investing more heavily in innovation (new features/capabilitys) more than security optimisations. Clearly the openness of code means vulnerabilities are more easily spotted in open-source than in “walled-garden” proprietary solutions. Not just by nefarious actors, but its development community as well. Linus’ Law suggests that “given enough eyeballs, all bugs (and security flaws) are shallow.” The question for open-source OSS/BSS is whether there are actually many eyeballs. All commercially successful open-source OSS/BSS vendors that I’m aware of have their own teams of professional developers who control any changes to the code base, even on the rare occasions when there are community contributions. However, many modern open-source OSS/BSS leverage other open-source modules that do have many eyes (eg linux, snmp libaries, Apache projects, etc)
- Quality – There’s no doubt that many open-source OSS/BSS have matured and found valuable business models to sustain them. With the profitable business model has come increased resources, professionalism and quality. With the increased modularity of modern architectures, open-source OSS/BSS projects are able to perform very specific niche functionalities. Contrast this with the monolithic proprietary solutions that have needed to spread their resources thinner across a much wider functional estate. Also successful open-source OSS/BSS organisations tend to focus on product development and product-related services (eg support), whereas the largest OSS/BSS firms tend to derive a much larger percentage of revenues from value-added services (eg transformations, customisations, consultancy, managed services, etc). The latter are more services-oriented companies than product companies.
- Flexibility – There has been a significant shift in telco mindsets in recent years, from an off-the-shelf to a build-your-own OSS/BSS stack. Telcos like AT&T have seen the achievements of the hyperscalers, observed the increased virtualisation of networks and realised they needed to have more in-house software development skills. Having in-house developers and access to the code-base of open-source means that telcos have (almost) complete control over their OSS/BSS destinies. They don’t need to wait for proprietary vendors to acknowledge, quote, develop and release new feature requests. They can just slip the required changes into their CI/CD pipeline and prioritise according to resource availability
- Support – Remember when I mentioned above that OSS/BSS organisations have found ways to build profitable business models around open-source software? In most cases, their revenues are derived from annual support contracts. The quality and coverage of their support (and the products that back it up) is directly tied to their income stream, so there’s commensurate professionalism assigned to support
- Continuity – This is perhaps the most interesting one for me. There is the assumption that big, commercial software vendors are more reliable than open-source vendors. This may (or might not) be the case. Plenty of commercial vendors have gone out of business, just as plenty of open-source projects have burned out or dwindled away. To counter the first risk, telcos pay to enter into software escrow agreements with proprietary vendors to ensure critical fixes and roadmap can continue even in the event that a vendor ceases to operate. But the escrow contract may not cover when a commercial vendor chooses to obsolete a line of software or just fail to invest in new features or patches. They’re effectively paying an insurance fee to have access to the code for operational continuity purposes but escrow may still not be as open as open-source, which is available under any scenario. But the more important continuity consideration is the data and data is the reason OSS/BSS exist. When choosing a commercial provider, especially a cloud software / service provider, the data goes into a black box. What happens to the data inside the black box is proprietary and often what comes out of it is also. Telcos will tend to have far more control of their data destinies for operational continuity if using open-source solutions
Now, I’m not advocating one or the other for your particular situation. As cited above, there are clearly pros and cons for each approach as well as different products of best-fit for different operators. However, open-source can no longer be as summarily dismissed as it was when I first started on my OSS/BSS journey. There are many fine OSS and BSS products and vendors in our Blue Book OSS/BSS Vendor Directory that are worthy of your consideration too when looking into your next product or transformation.