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VHF/Radar data IP, E1, and fiber-optic triple-link protection transmission
Release date:
2026-05-22
This solution employs the ZMUX-4102 multi-service access and transmission platform to handle multiple meteorological self‑monitoring digital signals—such as VHF and radar data IP—at remote sites, enabling triple‑redundant transmission and access while facilitating centralized monitoring and management of the entire network’s meteorological self‑monitoring signals at the central office. The equipment is compatible with a wide range of commonly used air traffic control service signals at airports.
By leveraging one IP dedicated line, one fiber-optic link, and one E1 circuit, automatic protection across three links is achieved, ensuring reliable transmission of critical services.
Under normal conditions, the ZMUX-4102 platform continuously monitors the communication quality of the three connected transmission lines and, by default, designates the IP dedicated line as the primary link.
When the primary IP leased line fails, the ZMUX-4102 automatically switches to the backup E1 line or the fiber-optic link for transmission.
If one of the two backup channels fails—such as in the event of a fiber‑optic line failure—the ZMUX‑4102 will automatically switch over to the standby E1 link.
When the IP dedicated line returns to normal, the ZMUX-4102 automatically switches back to the primary IP dedicated line for transmission.
It is recommended that the three circuits be connected via three distinct directions, taking spatial redundancy into account to prevent a scenario in which all three ground‑level circuits fail simultaneously.
Equipment Overview
The ZMUX-4102 provides standard STM‑1/STM‑4 interface ports, enabling it to form an SDH self-healing ring when deployed as an SDH device, and can also be connected to carrier‑grade STM‑1/STM‑4 lines to support wide‑area service transmission.
It supports three‑path link protection for IP, E1, and fiber optics, ensuring uninterrupted service as long as at least one link remains operational.
Link media options include: terrestrial fiber optic, terrestrial IP, and airborne microwave E1, enabling a “two‑site, one‑air” configuration.
Alternatively, you can choose: terrestrial fiber, terrestrial E1, or over-the-air wireless IP, to achieve “two sites, one air link.”
The ZMUX-4102IP link interface supports features such as transmission‑delay optimization, jitter‑buffering, and packet‑loss resilience, enhancing transmission stability and reliability and addressing issues of audio discontinuity, latency, or even interruptions in VHF voice communications.
Solution Advantages
1) Supports three‑path automatic protection for transmission.
2) Compared with conventional solutions, this approach simplifies the network topology and reduces capital expenditures on customer‑premises equipment.
3) The MUX-4102 equipment offers optional full-system redundancy, including dual-power supply redundancy, dual‑mainboard redundancy, and multi‑link transmission protection, ensuring high security and reliability.
4) It enables real-time monitoring of the status and performance of the entire ZMUX-4102 network, including power supply status, link status, service status, and more.
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