• 5.3 Packet and Header Structure
    		•

    1. 1 The Motivation




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    5.2.2 System Architecture
    This subsection illustrates the architecture of the system, is shows each sub-system mapping the data which is passed between them within the VoIPv6 Application


    Diagram 9, illustrates the Architecture of the System showing the data which will be passed between each subsystem.

    5.3 Packet and Header Structure
    The following subsection illustrates the packet and header structures which will be utilized within the VoIPv6 application.
    5.3.1 Signalling Structures
    All signalling and control information will be sent via a TCP connection on Port 3055. The structure of the signalling and controlling packets is a byte which depending on bit pattern represents the control signals being sent. Below is a list of instructions;


    00000001




    Initiate a Call

    00000010




    Cancel the Call

    00000011




    Accept the Call

    00000100




    Reject the Call

    00000101




    Hang up the Call

    00000110




    Receiving Channel Setup

    00000111




    Sending Channel Setup

    Currently there are only seven instructions, however with using a byte worth of reserved instruction space, instructions can be added at a later date if needed.



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