S0 interfaces and ISDN were developed in the 1980s, when voice and data security were not as critically important as they are today. Neither of these technologies uses data encryption, which creates potential security vulnerabilities and increases the risk of data breaches. The lack of security with SO interfaces and ISDN are in stark contrast to Voice-over-IP (VoIP) technology, which uses advanced encryption methods to protect voice calls routed over the internet.
If you are ready to switch to VoIP but still want to keep your existing ISDN technology, you can use a router with an S0 interface built in. This may help you extend returns on legacy telephony investments, but there are some known issues to be aware of, including poor or unreliable functioning of fax machines.
No, not really. With the internet able to route voice calls worldwide, there is no longer any need for the PSTN or for ISDN technology that routes calls across it. As a result, ISDN is being decommissioned across Europe in favour of all-IP telephony solutions and standards and, when that happens, S0 interfaces will become redundant as well.
The benefits of migrating from ISDN to all-IP include lower calling costs, simpler telephony services and reduced in-house hardware, software and support requirements.
For more information about VoIP and telephony in the cloud, enabled by technology such as the NFON Cloud Telephony System, please refer to the articles below: