What is cross phase compatibility?
In spec. 04.90 or 24.90, it came up in 6.2 section. 6.2 Cross phase compatibility6.2.1 Network only supports protocol version 1 of unstructured supplementary service data operations If a mobile initiated USSD request using protocol version 2 is rejected by the network, and the reason for the rejection is indicated either by the problem code "unrecognized operation" or a cause "Facility rejected"..
2014. 2. 6. 10:18