| 摘要 |
<p>A name server (DNS-A) of a first telecommunications network (CN-A) receives a query (2-5) containing or expressing a first form (e.g. E.164) of a subscriber ID, and replies to the query by informing a subscriber ID of a second form (e.g. SIP-URL) (2-7). The name server (DNS-A) detects that the subscriber ID relates to the subscriber who has been a subscriber of the first network (CN-A) but has become the subscriber of a second network (CN-B), and that the query was sent from a third telecommunications network (CN-C). The name server (DNS-A) starts a process which results in at least the domain address of the second network (CN-B) being transmitted to the sender (DNS-C, SIPS-C) of the query. In this way, traffic (2-10) can be transmitted directly between the third telecommunications network (CN-C) and the second telecommunications network (CN-B).</p> |
