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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Unlike the WSRM: Address element, this restricts the types of messages that may flow on the back channel.

与wsrm： Address元素不同，此元素限制了可以通过回发通道发送的消息类型。

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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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