在自动交换机与电话机方面资本支出的大量增加。

Substantial increases in capital expenditure on automated exchanges and telephones.

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史端乔式自动电话交换机形成。

Formation of Strowger Automatic Telephone Exchange.

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本文介绍电话局自动电话交换设备与机关企业用自动化小交换机间全自动化接续的接口电路。

The automatic connection interface circuits between the PABX and the automatic switch equipments of telephone office are presented in this paper.

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本文提出研制新型的基于CAN总线的数字程控交换机替换原有的全电子式自动电话交换机。

This article is proposed to develop a new type of digit programme-controlled telephone switching board which is based upon the CAN bus to replace the old automatic telephone switchboard.

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本文提出研制新型的基于CAN总线的数字程控交换机替换原有的全电子式自动电话交换机。

This article is proposed to develop a new type of digit programme-controlled telephone switching board which is based upon the CAN bus to replace the old automatic telephone switchboard.

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