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, SO 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: