Patent ID: 9253326
Filing Date: 2016-02-02
CPC Classification: H04L,H04M

Claim Text:
1. A method comprising: receiving, at a session border controller, a first call request from a calling device, the first call request directed to a first destination address; sending, by the session border controller, the first call request to a redirect server; receiving, at the session border controller, a first response from the redirect server indicating that the first call request should be redirected to a second destination address; based on receiving the first response from the redirect server, determining, by the session border controller, a first redirect identifier that includes information identifying the first call request; storing, by the session border controller, the first redirect identifier along with the second destination address; sending, by the session border controller, a message to the calling device indicating that the first call request is to be redirected, the message including the first redirect identifier and a respond-to address associated with the session border controller; receiving, at the session border controller, a second call request from the calling device, the second call request directed to the respond-to address associated with the session border controller and including a second redirect identifier; determining, by the session border controller and based on the second redirect identifier matching the first redirect identifier stored at the session border controller, that the second call request is a redirection of the first call request; in response to determining that the second call request is a redirection of the first call request, retrieving, by the session border controller, the second destination address that is stored along with the first redirect identifier on the session border controller; and sending, by the session border controller, the second call request to the second destination address.