Abstract: A selection server device may receive a first registration request and determine that a user device is associated with a non-local call service control function (CSCF) server device and that the user device is located outside of a service area associated with the non-local CSCF server; output a non-preferred server indication to the non-local CSCF server device to cause the non-local CSCF server device to be disassociated with the user device; receive a second registration request from the user device; determine that the user device is not associated with any CSCF server; and output the second registration request to a local CSCF server device, associated with a service area in which the user device is located, to cause the local CSCF server device to register the user device with the local CSCF server device.

Abstract: A selection server device may receive a first registration request and determine that a user device is associated with a non-local call service control function (CSCF) server device and that the user device is located outside of a service area associated with the non-local CSCF server; output a non-preferred server indication to the non-local CSCF server device to cause the non-local CSCF server device to be disassociated with the user device; receive a second registration request from the user device; determine that the user device is not associated with any CSCF server; and output the second registration request to a local CSCF server device, associated with a service area in which the user device is located, to cause the local CSCF server device to register the user device with the local CSCF server device.

Abstract: A selection server device may receive a first registration request and determine that a user device is associated with a non-local call service control function (CSCF) server device and that the user device is located outside of a service area associated with the non-local CSCF server; output a non-preferred server indication to the non-local CSCF server device to cause the non-local CSCF server device to be disassociated with the user device; receive a second registration request from the user device; determine that the user device is not associated with any CSCF server; and output the second registration request to a local CSCF server device, associated with a service area in which the user device is located, to cause the local CSCF server device to register the user device with the local CSCF server device.

Abstract: A selection server device may receive a first registration request and determine that a user device is associated with a non-local call service control function (CSCF) server device and that the user device is located outside of a service area associated with the non-local CSCF server; output a non-preferred server indication to the non-local CSCF server device to cause the non-local CSCF server device to be disassociated with the user device; receive a second registration request from the user device; determine that the user device is not associated with any CSCF server; and output the second registration request to a local CSCF server device, associated with a service area in which the user device is located, to cause the local CSCF server device to register the user device with the local CSCF server device.

Abstract: A call forwarding server in a telephony network is configured to provide an authorization function during activation of a call forwarding service. In response to receiving a forwarding request including initiating and terminating telephone numbers (TN), the call forwarding server generates and sends a request for the terminating TN to obtain authorization for the forwarding service. In response to receiving an authorization response for enabling call forwarding, the call forwarding server enables call forwarding for the initiating TN by updating a call forwarding record to include an entry including the initiating TN and the terminating TN. Communications placed to the initiating TN are automatically forwarded to the terminating TN once the forwarding service is enabled.

Abstract: A call forwarding server in a telephony network is configured to provide an authorization function during activation of a call forwarding service. In response to receiving a forwarding request including initiating and terminating telephone numbers (TN), the call forwarding server generates and sends a request for the terminating TN to obtain authorization for the forwarding service. In response to receiving an authorization response for enabling call forwarding, the call forwarding server enables call forwarding for the initiating TN by updating a call forwarding record to include an entry including the initiating TN and the terminating TN. Communications placed to the initiating TN are automatically forwarded to the terminating TN once the forwarding service is enabled.

Abstract: A device receives a call for a user device associated with an Internet protocol multimedia subsystem (IMS) network, where the call includes a mobile directory number (MDN) associated with the user device, and retrieves, from a home location register (HLR), an address of a wireless intelligent network (WIN) termination trigger service control point (SCP). The device sends, to the WIN termination trigger SCP, a first message that includes the MDN, receives, from the WIN termination trigger SCP, a second message that includes steering digits as a prefix to the MDN, and generates a third message that includes a called party number set to the MDN and omits the steering digits. The device also routes, based on the steering digits, the third message to a media gateway control function/media gateway (MGCF/MGW) of the IMS network, where the MGCF/MGW further processes the call.

Abstract: A device receives a call for a user device associated with an Internet protocol multimedia subsystem (IMS) network, where the call includes a mobile directory number (MDN) associated with the user device, and retrieves, from a home location register (HLR), an address of a wireless intelligent network (WIN) termination trigger service control point (SCP). The device sends, to the WIN termination trigger SCP, a first message that includes the MDN, receives, from the WIN termination trigger SCP, a second message that includes steering digits as a prefix to the MDN, and generates a third message that includes a called party number set to the MDN and omits the steering digits. The device also routes, based on the steering digits, the third message to a media gateway control function/media gateway (MGCF/MGW) of the IMS network, where the MGCF/MGW further processes the call.