Patent ID: 8019587

Claim:
A method for upgrading redundant network components, comprising: receiving, by a mate network computer, a replication request from a network component, the network component related as a redundant peer to the mate network component processing a stable call; assigning an entry of a replication table of a shared memory database to the stable call, the replication table associated with the network component; transferring subscriber data of a first version from the mate network component to the network component if the mate network component is in an active mode and the network component is in a standby mode, the subscriber data including features that subscribers have subscribed to, the subscriber data used by the network component or the mate network component to process calls; and updating the entry in response to storing the subscriber data in the shared memory database; stopping transferring the subscriber data from the mate network component to the network component if the mate network component is in a transient standby mode and the network component is in the standby mode; and updating the entry in response to transferring the subscriber data.