Loop Telecom equipment was recently installed for a metro railway application in a large, modern city in the Middle East. The railway operator was looking to expand and upgrade an existing line and needed a way to relay alarm, security, and passenger information back to the headquarters for central monitoring.
The communication backbone works like this. An STM-16 ring consisting of SDH nodes connects the entire line. The SDH node used in this application was the Loop-O9400R; however, the Loop-O9500R can also be used depending on the capactiy required. At each station the SDH node drops into Ethernet lines to feed SCADA, security cameras, and passenger information such as bulletin boards, time schedules, and video advertisements. The O9400R also drops into AM3440 (PDH) for low speed dry contacts and legacy telephone access.
At the central headquarters, information from each station is aggregated into central interfaces for monitoring. A master telephone switch connects traditional, legacy telephones at each station. Management by Loop-iNET allows the network administrator to easily change settings for all units from a single location. For this simple, relatively small network, large NMS software was not needed.
Loop Telecom equipment was noted for its quality, ease of use, and reliability. Establishing this network allowed the metro rail managers to monitor their passengers and better respond to abnormal events such as natural disasters, criminal activity, or high traffic.
Computers and electronic devices combined with a robust communications network meant that more information was able to reach more people faster, and without requiring as many staff. The result was a better and more reliable transportation network for the public to get around the city.