Regulations for Reporting Telecommunications Services Inaccessible Due to Major Incidents Article 7

Where the telecommunication enterprise is unable to conduct the reporting as described in these Regulations, the telecommunication enterprise may submit a report to the competent authority by telephone, email, text message or other methods.
中文原文 電信事業重大事故無法提供電信服務通報辦法第7條
電信事業無法以本辦法所定方式通報時,得先以電話、電子郵件、簡訊或其他方式向主管機關通報。

English translation for reference only; the Chinese text prevails. Not legal advice.