Ip network service telephone calls between functions, including point-to-point call, group call functionality, group calling, local phone book management, as well as the interface of the user-friendly operation.

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Under between the IP network service telephone telephone conversation function, including the point-to-point call, the group shouts the function, the group calling function, local telephone this management as well as contact surface user friendly operation.

In IP networks between business phone call functions, including point-to-point call, group call feature, group calling features, management and the interface of humanization of the local telephone operations.

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