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力强,集成度高，稳定性强。是最先进的通讯产品技术标准：按〈YD／T729－94《程控交换机进网检测方法》，GF002－9002.4《邮电部电话交换设备总技术规范书》，YD344－90《自动交换技术要求》与国际电信联盟（ITU-T）等国际标准。最大容量：10000门供电：AC220V?10％或DC48V音源频率：450HZ振铃信号：AC75V 25HZ用户馈电：18MA功耗：25W－500W主要功能：【主要功能100余项不能全例】直拨分机：外线直接拨入分机号来电显示：可显示外线与内线来电号码