長途呼叫信號 的英文怎麼說
中文拼音 [zhǎngtúhūjiàoxìnháo]
長途呼叫信號
英文
trunk call signal-
Draft standard to match to and work with ets 300 001 net4. apparatus with one or more particular functions for connection to public switched telephone networks run by certain public telecommunications operators. apparatus with auto - calling, auto - answering and auto - clearing facilities. specification for auto - calling facilities
與ets 300001 net4相適應的標準草案"由某些公共長途通信接線員操作的公共交換電話網連接用單功能或多種特別功能裝置" .第3部分:有自動呼叫號自動回答和自動消號設備的裝置.第3 . 1節:自動呼叫設備規范
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