We need to link an existing system of M/s Cegelec(currently ALSTOM ESCA)with our system, running on IEC 870-5-101 FT1.2 protocol. We understand that the Teleconnect protocol is supposed to be based on IEC-870-5-1(1990). We are not really sure. As there are no documents with our clients & for us to integrate the legacy system with the clients existing RTU's, we are in need of some help. Can any one help us find Data on Teleconect III protocol. (Can anybody provide us with a protocol convertor alternately.) We are not sure if the protocol is protected.