IDM 30AN Fiber and E1 Transmission Channel Mutual Backup Device

In some applications, there is a need for both fiber optic lines and E1 lines to serve as mutual backup transmission channels simultaneously.

For example, a forest fire prevention unit's lookout point normally uses fiber optics to communicate with the base station. To prevent cable damage caused by mountain torrents during flood season, a microwave bridge + reverse bridge is adopted to provide an E1 channel as backup.

Another example is an air traffic control unit, which normally has its own fiber optic lines to radar stations/communication stations. To increase reliability, they also lease E1 channels from telecom operators as backup channels.

The IDM 30AN prioritizes the fiber optic transmission channel under normal operation. When using fiber optic transmission, it can simultaneously provide one group of line-rate 100M Ethernet channels. When a fiber optic failure occurs, the E1 transmission channel is activated to ensure the minimum business transmission requirements.

The narrowband services of the IDM 30AN are transmitted over both fiber optic and E1 channels simultaneously, with the fiber optic channel given priority.

To distinguish it from the standard IDM 30AN, it is commonly designated as IDM 30AN-H.