| 摘要 |
Systems and methods for integrating subscriber management and call control functionalities in a packet data network are provided. Subscriber management services include things such as tracking usage for billing, providing account information, and authorization of resources to a subscriber or user. Call control functionality includes setting up Session Initiation Protocol (SIP) call sessions for the exchange of data. SIP functionality is provided by a SIP server and subscriber management is provided by a Network Access Server (NAS), where the SIP functionality and NAS functionality are implemented on the same device. The combined device can maintain at least one database that maps information between the functionalities, so both functionalities may access or be alerted to the other's information.
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