A communication network for transporting calls, where a service provision entity adds user identification information to call data of a call being set up by a non-dialable virtual subscription such that the subscriber behind the call being set up by the non-dialable virtual subscription may be identified at the network switching layer. This increases the manageability of the network and provides advantages for call interception.

 
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> Mapping text and audio information in text messaging devices and methods therefor

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