Both Signalling and user data may be subject to ciphering.

信令和用户数据都应被加密。

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The present document specifies the standards for user data transport protocols and related signalling protocols to establish user plane transport bearers over the S1 interface.

文档对数据传输协议和相关的通过S1接口建立用户平面传输承载的信令协议进行了详细的说明。

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This Recommendation describes the elements of signalling information used by the ISDN user part protocol and their function.

本建议叙述ISDN用户部分协议所用的信令信息要素和它们的功能。

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They provide no Adsense revenue and, equally importantly, give Google none of the signalling information about user behaviour and intention that, for example, feeds Google Now.

FORBES: Android, China and Addressable Markets