Companies around the world are ceasing to use ISDN as a result of technological changes, rising maintenance costs of older infrastructure, and the requirement for more flexible solutions.
Why is ISDN becoming obsolete?
Significant changes in telephone technology have occurred over the past few years, leading to a decline in the importance of ISDN. To encourage their customers to adopt modern solutions, even the largest operators are gradually phasing out ISDN services
This trend has several reasons:
- End of ISDN support: Many operators have decided to withdraw support for this technology, meaning that users of this technology may soon be left without sufficient support and updates.
- High maintenance costs: ISDN requires appropriate telephone lines and equipment. ISDN is significantly more expensive than VoIP, which uses the internet infrastructure that already exists.
- Lack of flexibility: ISDN is a relatively rigid solution. Scaling infrastructure or adding new telephone lines are major challenges. Everything is done via the Internet with VoIP, making the system more flexible and easier to expand.
What are the benefits of switching to VoIP?
Voice transmission over the Internet instead of traditional telephone lines is possible thanks to VoIP technology. The growing popularity of VoIP stems from the many advantages it offers to both users and businesses:
This trend has several reasons:
- Savings: VoIP is much cheaper than ISDN because it does not require complex infrastructure or special telephone lines. It is cheaper to call over the internet, especially for international calls.
- Flexibility: VoIP allows for easy scaling. You can add new phone lines as needed without investing in additional physical equipment or lines. It only requires internet access.
- Integrated features: VoIP offers more features than ISDN, such as call forwarding, voicemail, integration with CRM systems and business applications. Many of these features are already in the standard package.
- Mobility: VoIP allows you to use telephone services as long as you have internet access. The ability to receive and make calls on your phone, laptop, or tablet is particularly useful for remote work.
- Management and configuration: VoIP is easier than migrating to ISDN. Most VoIP service providers offer simple configurations that can be done yourself or with minimal technical support.
What does the transition from ISDN to VoIP look like?
Although it requires a few steps, migrating from ISDN to VoIP does not have to be difficult:
Needs assessment: Before starting the migration, it is important to thoroughly examine the company's needs. Check VoIP services and features such as phone numbers, video conferencing, and integrations with other systems.
Choosing a provider: Many VoIP service providers are available on the market. Service quality, feature availability, and technical support should be key factors when choosing an operator.
Number migration: You can port your numbers to the new VoIP provider if you are using them. Number porting is easy and proceeds without problems for telephone services.
Testing and implementation: It is worth conducting tests before fully switching to VoIP to ensure that all functions work correctly. After testing, you can begin full system implementation.
Switching from ISDN to VoIP is a step towards the future that allows companies to save money, be more flexible, and have better connections and many modern features. Although this change requires some effort, the long-term benefits far outweigh the initial obstacles. If your company has not yet adopted VoIP, now is the right time to do so!
Peoplefone Polska, a VoIP telephony operator, offers reliable and modern solutions tailored to the needs of your company, supporting you in the entire migration process. Thanks to our experience, switching to VoIP will be quick, efficient, and hassle-free.

We encourage you to contact us for detailed information: