public void RemoveMapItem(int number)
{
IPort port = _portMapping[number];
if (port.State != PortStates.Busy)
{
ITerminal terminal = _terminalMapping[number];
port.ExemptPort();
port.PortStateChanging -= this.DetectChanges;
port.PortCallSending -= this.HandlePortCallRequest;
port.PortAnswerSending -= this.HandlePortAnswerRequest;
port.PortRejectSending -= this.HandlePortRejectRequest;
_portMapping.Remove(number);
_terminalMapping.Remove(number);
}
}
