Patent ID: 8712452

Claim:
A method comprising: receiving, by a mobility controller, a first Short Message Service (SMS) message from a cellular-PBX multimode phone while the cellular-PBX multimode phone is on a current ongoing call; wherein the first SMS message comprises a target number that is to be used in a call function for the cellular-PBX multimode phone; extracting, by the mobility controller, the target number from the first SMS message; transmitting, by the mobility controller to a Private Branch Exchange (PBX), a second Session Initiation Protocol (SIP) message; wherein the second SIP message is transmitted for initiating the call function for the cellular-PBX multimode phone based at least on the first SMS message received from the cellular-PBX multimode phone; wherein the initiating operation comprises initiating call conferencing of the current ongoing call for the cellular-PBX multimode phone to include an additional phone that corresponds to the target number in the first SMS message; wherein the mobility controller comprises a hardware processor.