Calling card system for voice and data transmission over a public network

A calling card system for communication devices capable of transmitting both voice and data communication over a public network, the calling card system comprising:

• a PSTN capable of communication with communication devices;
• and
• a service selection gateway in communication with communication devices via the PSTN, wherein the service selection gateway is operable to identify communication from the communication devices as one of voice communication and data communication,
• wherein voice communication is selectively forwarded by the service selection gateway to one of a public network and the PSTN,
• wherein the service selection gateway is operable to provide voice communication forwarded to the public network in a voice based network protocol that is transmittable over the public network,
• wherein the data communication is transmitted over the public network in a data network protocol by a data gateway within the service selection gateway.