subway E1 protection collinear ring transmission system in Beijing

Overview

The project involves 1 central station and 11 remote stations. One central station and each remote station install one ZMUX-3036 intelligent PCM multiplexing device, and each ZMUX-3036 provides one RS422 dynamic ring monitoring data. The E1 ring network is formed based on the E1 link to realize remote station and central station between the RS422 dynamic ring monitoring data collinear communication and the E1 ring network protection function.

RS422 data is sent from the central station, and the remote station receives: the central station ZMUX-3036 copies one RS422 into two RS422s, which respectively cross the first and second E1 interfaces of ZMUX-3036, and pass through the two E1 links. (2*E1 directions) are transmitted to each remote station. Each remote station ZMUX-3036 receives the RS422 data sent by the central station from the 2*E1 directions to implement the E1 ring network protection function. In one direction, the E1 link is faulty, and the E1 link can be transmitted through the other direction, that the RS422 service is highly secure and reliable.

The RS422 data is transmitted from the remote station, and the central station receives: each remote station ZMUX-3036 copies one RS422 into two RS422s, and respectively crosses to the first and second E1 interfaces of ZMUX-3036, and passes through two channels E1 link (2 E1 directions) and transmit to the central station. The central station ZMUX-3036 receives the RS422 data sent from the two E1 directions of each remote station to implement the E1 ring network protection function. In one direction, the E1 link is faulty, and the E1 link can be transmitted through the other direction. So the RS422 service is highly secure and reliable.

ZMUX-3036 is a versatile and intelligent integrated service access device for cross-connecting and multiplexing various service signals such as telephone, audio, data, and images into the 1~4 channel E1 interface for point-to-point or point to multi-point transmission.

ZMUX-3036 provides four E1 interfaces and supports 4E1 full-slot cross-connection. Each E1 port can serve as an uplink port to carry various services. The transmission protection mode can be flexibly configured between the four E1 ports, supporting 1+1 protection and N:M protection. The device has a complete network management function to effectively manage and maintain the entire network.