The first phase of the Purple line consists of 16 stations and was opened for service in August 2016. This elevated line stretches 23 km from Khlong Bang Phai in the northwestern suburb of Bangkok to Tao Pun in the city center. The Mass Rapid Transit Authority of Thailand (MRTA) expects the route will serve an average of 200,000 daily passengers during the first year of operation, with the total gradually increasing to 400,000 by 2019.
The backbone for train and platform operations is provided by OTN Systems.
The network is an all IP network build on the N70 and ETS product lines. This multiservice network has over 9.000 Ethernet ports in operation and connects seamless to the OTN network installed on the Blue Line.
Phase 2 of the Purple line will run southward from Tao Pun station, passing by Bangkok's old quarter, terminating in the Rat Burana District. This extension of 19,8 km consists of 11 underground and five elevated stations. Further extensions are planned both to the North and the South.
OTN Systems has equipped all of Bangkok's mass transit lines with fiber optic backbones. The first system, Bangkok's BTS Skytrain, was opened to the public in 1999.