Rules that a LEC (Local Exchange Carrier) employs to redirect a call that encounters a Busy or No Answer.

当呼叫遇忙或无应答时，LEC(本地电话公司)使用该规则重新发送呼叫。

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International Exhibition Center, as the national economy, culture, art exchange carrier, a large number of gathering and transmission of new knowledge.

国际展览中心作为国民经济、文化、艺术交流的基础载体，聚集并传递大量的新知识。

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Jon walks into the campus security office in his Telco costume and explains that he has been called out by the Local Exchange Carrier (LEC) because a circuit appears to be looped from the Telco.

Jon穿着他的电信制服走入场地安全办公室，然后说明他是由本地交换运营商(Local Exchange Carrier (lec))派来的，因为看来电路从电话公司形成了回路。

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Another partnership links Comm South, a Dallas-based residential-phone service provider, with a competitive local-exchange carrier called Arbros that focuses on U.S. East Coast businesses.

FORBES: Reverses

The authors believe their system could combine the advantages of methanol as a hydrogen carrier and of proton-exchange membrane (PEM) fuel cells for efficient energy production.

BBC: Hydrogen's energy promise improves

While the company still hopes to show net positive postpaid adds for the year after the phenomenal Apple iPhone 4S debut, the huge upfront subsidies that the carrier will have to offer its iPhone customers in exchange for a two-year contract will be a big detriment to its margins in the near-term.

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