| 摘要 |
A communication system comprises an end system coupled to an access system and configured to transmit an invite message for a session wherein the invite message indicates a destination and an alias for the end system, a proxy system configured to receive the invite message and transfer a quality request wherein the policy request indicates the alias, a policy system configured to receive the quality request, determine a quality level for the session and transmit a quality message to the access system indicating the alias and the quality level, and the access system configured to receive the quality message, transmit a query to a database system indicating the alias, receive a network address for the end system in response to the query, identify traffic for the session using the network address, and apply the quality level to the traffic.
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