PTC element as over-current limiter for program-controlled telephone exchanger is one of the important application of PTC ceramic material.

程控电话交换机过电流保护元件要求用低电阻率高性能的PTC陶瓷材料来制备。

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High performance PTC ceramic material with low resistivity is desired to prepare an over-current limiter for program-controlled telephone exchanger.

程控电话交换机过电流保护元件要求用低电阻率高性能的PT C陶瓷材料来制备。

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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.

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。

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NTT, the state-controlled telephone monopoly, on corporate communications and data services.

ECONOMIST: Wiring corporate Japan

Until Bill McGowan came on the scene in 1974, American Telephone and Telegraph had controlled all aspects of telephony in the United States through its monopoly position.

FORBES: MCI's Bill McGowan Proved That Telephony Competition is Good for Consumers

All are now said to start testing in the coming months, and we're just learning that the car will feature GLONASS navigation, is said to include a "telephone with a keyboard" and will have some sort of infotainment system controlled by a "data panel, " which we're hoping is a little better integrated into the dash than the slab dominating the Model S center console.

ENGADGET: Yo-mobile hybrid cars on display in Russia, run on gas, natural gas, and GLONASS