In telecommunication systems and therefore also in IP systems E.164 numbers (or dialled numbers related to E.164) are used by end users to identify the destination of a call. In IP systems, when an end user is attached to a terminal, the E.164 name of this end user is temporarily associated with the IP address (transport address) of the terminal (endpoint). Private numbering schemes use similar arrangements. This technical report defines the requirements for finding destinations (IP addresses of endpoints) on interconnected IP networks (systems) for calls originating on or transiting via IP telephony networks. The final destination of the call may be either the IP network itself or on the SCN. In this case the IP address needs to identify the POI to the SCN. Although the TR defines requirements for E.164 numbers, the same principles could be applied to any new naming system that might be introduced for telephony. The TR deals with obtaining IP-address (or Contact Addresses) for routing Call and Service Control Messages (including database queries) and Media Stream Packets. The TR covers the requirements for calls to all types of number structures within E.164, national and private networks and includes the support of number portability, mobility and roaming.
| Edition : | 2.0.0 |
| Number of Pages : | 31 |
| Published : | 02/01/2002 |
