FIELD: radio engineering, communication.
SUBSTANCE: method comprises steps of: receiving, by a first application server at the called side, a primary request message bearing a service identifier which induces an override service during an emergency call, from a second application server at the calling side; realising, by the first application server, the override service during the emergency call in accordance with the service identifier; before the first application server receives the primary request message from the second application server, receiving, by the second application server, a request message bearing a service code from the calling side, and if the second server determines that the service code is an access code for the override service during the emergency call, deleting the service code from the primary request message; setting the service identifier in the primary request message and sending the primary request message by the second application server to the first application server.
EFFECT: reduced load on data transmission in a network.
11 cl, 8 dwg
