ISDN is being decommissioned for a number of reasons, mostly to do with future-proofing service providers’ operations. Key reasons include:
High operating costs
ISDN requires service providers to operate one network for voice calls and a second network for internet and data connections, duplicating their costs and workloads.
Complex, expensive management and support requirements
ISDN was developed in the 1980s and relies on outdated hardware and software that is costly and time-intensive to maintain and support.
Non-secure voice calls
ISDN offers no protection against increasingly sophisticated hackers, making voice calls over the PSTN vulnerable. By contrast, the best VoIP solutions, such as the NFON Cloud Telephony System, use sophisticated encryption technology to keep users’ data safe.