telephone program-controlled switchboard
...电话程控交换机；E1中继；广域网 [gap=258]Key words: IP technology; integrated voice; data network; telephone program-controlled switchboard; E1 relay; WAN ...
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telephone program-controlled switchboard
电话程控总机
以上为机器翻译结果，长、整句建议使用 人工翻译 。