The primary functions of SSP are Call Control Function(CCF), Service Switching Function(SSF) and Special Resource Function(SRF). They are designed respectively.是什么意思_The primary functions of SSP are Call Control Function(CCF), Service Switching Function(SSF) and Special Resource Function(SRF). They are designed respectively.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句