Earlier this month, he hinted in Seattle that a back-channel discussion was already under way.

本月早些时候，他在西雅图就曾暗示双方私下接触商谈已在进行。

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Both provide a means to tell a sending endpoint that it should "buffer" messages when the transport back channel is not available.

都提供了相应的方法来告知发送端点应该在传输回发通道不可用的情况下“缓存”消息。

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But such unofficial meetings provide a back channel for discussions between North Korea and the us, which do not have diplomatic relations.

但这种非官方的会谈为未建立大使关系的朝美提供了一种隐蔽的谈判渠道。

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He cites the early involvement of the CEOs, referencing back-channel efforts involving News Corp.

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However, much of this good will has been over the airwaves and direct or back-channel talks have yet to start.

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Back-channel sales data from web advertisers indicates pricing has begun heading higher as demand remains strong, he noted in a research note Tuesday.

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