公用: for public use; public; comm ...交换: exchange; swap; interchange; ...数字: figure; digit; numeral; char ...数据: data; record; information业务: vocational work; professiona ...数字数据业务: digital data service dds分组交换数据业务: psds packet switched data service综合交换数据业务: isds integrated switched data service数字数据业务（北美）: dds digital data service中指定的公用交换数据网: psdn数字数据业务衔接器: ddsa digital data service adapter专用电路数字数据业务: private circuit digital data service分组交换数字数据网: packet switched digital data network数字数据交换业务: digital data switching service; switched digital data service数字数据交换: ddx digital data exchange数字数据电话业务: dds数字数据电路业务: digital data circuit service数字数据交换包: ddx-digital data exchange - packet数字数据交换机: digital data exchange数字数据交换器: ddc; digital data converter数字数据交换网络: digital data exchange network公用电路交换数据网: circuit switched public data network cspdn中国公用分组交换数据网: china public allocation exchangeability; chinapac china public allocation changeability公用交换: public exchange公用交换机: public exchange
