Service Request Transport Protocol (GE-SRTP) protocol is developed by GE Intelligent Platforms (earlier GE Fanuc) for transfer of data from PLCs. The protocol is used over Ethernet almost all GE automation equipment supports the GE-SRTP protocol when equipped with an Ethernet Port. Any SRTP client will be capable of reading and writing system memory of any number of remote SRTP capable devices.
References
Service Request Transport Protocol Wikipedia(Text) CC BY-SA