Patent ID: 8654961
Filing Date: 2014-02-18
Classification: H04M,H04Q

Abstract:
1. A method comprising: establishing, by a call handling device, call sessions between one or more local end devices and an external network, wherein receiving a signal over a prioritized local interface at the call handling device, the signal indicating a request of a prioritized local end device to establish a prioritized call session; determining, by the call handling device and in response to the received signal, that each call session identifier in a subset of the plurality is in use, wherein the subset comprises multiple call session identifiers but includes less than all call session identifiers of the plurality; dropping a pre-existing call session using a call session identifier of the subset, wherein the pre-existing call session is dropped by the call handling device responsive to the determining and while a call session identifier of the plurality but not in the subset is free; and establishing the prioritized call session from the call handling device using the call session identifier in the subset that was in use by the dropped pre-existing call session.