Arrangement for dynamically diverting communications having characteristics incompatible with a communication device to another device

A monitoring device monitors headers of packets on a communications session with a primary communications device, and when it detects packets of a medium that is incompatible with the primary device, it causes those packets to be diverted to a secondary device that is associated with the primary device and that is compatible with that medium. During set-up of the communications session, the monitoring device replaces or supplements the handshake of the primary device, thereby providing to the network a single handshake that identifies the media supported by the combination of the primary and secondary devices.