... IAD integrated access device 综合接入装置 IOC independent operating company 自主营业公司 IPPBX IP-private branch exchage 网际协议专用交换机 ...
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IOC：独立自主的运营公司（Independent Operating Company） IP集中交换（IP Centrex）
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IOC independent operating company 自主营业公司
IOC C independent operating company 自主营业公司
BT's plans to turn itself into a holding company and several quasi-independent operating companies is that they have taken so long to appear.
ECONOMIST: British Telecom
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