Singapore's Infocomm and Media Development Authority (IMDA) is investigating Singtel over a recent nearly 24-hour broadband outage islandwide.
Singtel announced the outage commenced at around 8:45am on Saturday and services were fully restored at 8:25am on Sunday, although some customers were still reporting connection problems.
The operator said on social media that its engineers are still tracing the cause of the outage, which was associated with servers being unable to assign IP addresses to customers' modems. TV, fixed phone and mobile services remained unaffected.
Engineers have so far ruled out a DDoS attack, indicating that the company did not face a Mirai-linked attack of the kind that left a significant portion of customers of Germany's Deutsche Telekom without services late last month.
Singtel announced it will provide affected broadband customers with a 10% discount on their month's bill, and the company will waive mobile data charges accrued over the weekend for its joint broadband and mobile subscribers.
In a statement, the IMDA said the regulator takes service outages seriously and will be investigating both the cause of the incident and the service recovery measures taken by Singtel.