PSTN (Public Switch Telephone Net) short message, which is recently introduced by China Telecom, is a non-voice value-added service.
固话短信是中国电信新近推出的一项基于固定电话网的非话音类增值业务。
PSTN (Public Switch Telephone Net) short message, which is recently introduced by China Telecom, is a non-voice value-added service.
固话短信是中国电信新近推出的一项基于固定电话网的非话音类增值业务。
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