| 摘要 |
<p>A receiver (20) is communicating with an initiator (10) of a call via a communication network, the initiator (10) sets up a first call setup message, the receiver (20) terminates said first call set-up message before a connection is made and transmits a second call setup message towards the initiator (10) such that debit note will be billed to the receiver (20).</p> |
