Persero and Teltronic to integrate ETCS and CBTC over TETRA and LTE October 1, 2018 | Asia Pacific News Indonesia-based PT LEN Industri (Persero) and Spain based Teltronic have signed a memorandum of understanding (MoU) to combine Persero’s European Train Control System (ECTS) and communication based-tr... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password