Abstract: A method of using a dynamic access number architecture of a mobile communication device includes receiving a selection via a user interface of a mobile communication device. The selection indicates a preferred routing number associated with a particular country. The method also includes sending a message from the mobile communication device to a network element to request validation the preferred routing number selection. After a successful validation of the preferred routing number, when the mobile communication device is within the particular country, the mobile communication device automatically routes particular calls via an access device associated with the preferred routing number by dialing the preferred routing number.

Abstract: A system and method for implementing large and/or multiple telecommunication protocols utilizing memory-limited processors. Telecommunication protocols are expressed as virtual machine instructions defining a finite state machine. A telecommunication protocol engine implements the telecommunication protocols using a virtual machine operating under the control of a CPU. A telephony gateway comprising a telecommunication protocol engine interfaces with a communication device and a packet switched network. A network of telephony gateways communicating with a provider gateway facilitates communication over a packet switched network. A call placed by a calling telephony gateway to a receiving device on the same network or another network is routed according to a prefix in a telephone code sent by the calling telephony gateway.