English translation for "call program signal"

呼叫进展信号

Similar Words：

"call processing pragram" English translation, "call processing program" English translation, "call processing subsystem" English translation, "call processor" English translation, "call program" English translation, "call progress" English translation, "call progress indicator" English translation, "call progress signal" English translation, "call progress tone" English translation, "call provision" English translation