1. The GSN portion of the UPTN does not contain any identification of country (origin or destination) or service provider.
UPTN的GSN部分不包含任何国家（源地和目的地）或业务提供商标识。
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2. In a type of mobile communication systems, data transmits through two notes, GSN and PCU. Some delays and interruptions occur because of the wireless link.
3. In a type of mobile communication systems, data transmits through two notes, GSN and PCU. Some delays and interruptions occur because of the wireless link.
