Đối với thiết bị Network: - Trong vòng 4 giờ kể từ thời điểm hỏng hóc phải có thiết bị thay thế. Thiết bị thay thế trong thời gian này có thể thay thế tạm thời bằng thiết bị có tính năng giống hoặc tương đương.
For Network equipment: -Within 4 hours from the time of the failure to have the device replaced. Equipment replacement during this time may temporarily replaced by devices that have the same or similar features.
For equipment Network: - Within 4 hours from the time of failure must have replacement equipment. Replacement equipment during this time can be replaced temporarily by devices with the same or similar features.
Network equipment:- the 4 hour period is the replacement of the damaged equipment. In equipment replacement, this time can be replaced by a temporary device or function similar to the corresponding.