用户自动交换机迅速普及。开发无人交换机远端报警设备。
Rapid expansion in the use of private automatic branch exchanges. Development of remote alarm equipment for unattended exchanges.
有些交换机可配置进行裁剪通过开关以每港口基础直到用户定义阈值误差达到当他们自动改变存储转发模式。
Some switches can be configured to perform cut-through switching on a per-port basis until a user-defined error threshold is reached, when they automatically change to store-and-forward mode.
该接口利用微型计算机技术从HJ—921型交换机的公共控制设备采集，并向农村支局自动交换机转发被叫用户号码。
Making use of microcomputer techniques, the interface collects information from common control exchange HJ-921 and repeats called subscriber number to rural telephone exchange.
本文着重介绍市话局用户呼叫小交换机用户的全自动接续的各种接口电路方案。
This Paper introduces the interface circuits schemes of the PABX that realizes the local office subscribers to call the subscribers of PABX.
本文着重介绍市话局用户呼叫小交换机用户的全自动接续的各种接口电路方案。
This Paper introduces the interface circuits schemes of the PABX that realizes the local office subscribers to call the subscribers of PABX.
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