We would like to inform CS OTE users that CS OTE (including automatic communication and test environment - sandbox) will be unavailable on 22th September 2026 from 4:30 p.m. to 9:00 p.m. due to regular maintenance. During this maintenance we will apply changes on the basis of operation´s experience. Gas nominations entered into NET4GAS during an OTE maintenance have to be re/nominated.

Outage schedule:

• Minor outages and instability of the OTE Portal: 4:45 PM – 8:40 PM

• OTECOM outage: 6:00 PM – 8:10 PM

• Outage of automated communication for the markets area: 5:15 PM – 6:25 PM

• Outage of OTE Portal sections and automated communication for CDS Electricity, CDS Gas, and RES Support (POZE): 5:15 PM – 8:05 PM

Thank you for Your understanding and we apologize for any inconvenience.