... ObjectInputStream.1
  All packets exchanged by ITX peers are SigPackets, which are serialized to and from object streams. InvitePacket is a subclass of SigPacket.

      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .

... InvitePacket 2
  that is, `mySP.isInvitePacket()` is true

      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .

... `myConnectionList`.)3
  As of July 27, 1999 these methods are synchronized to remove a race condition among multiple non-blocking dial operations.

      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .

... `startKeepAlive()`.4
  Note that hangups are a function of the DesktopSignaling, and not of the SignalConnection.

      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .

...Caller 5
  The caller is the DesktopSignaling on which the `Dial()` method was first invoked. The callee is the DesktopSignaling belonging the the Gateway or other ITX application, depending on which Location of the target is being contacted.

      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .

... period.6
  For example, if the caller is on a computer which has no audio devices, then the caller's DesktopSignaling will reject the invite and then call its application's `onAbortCall` handler.

      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .

... `myConnectionList`.7
  The exception is `abortCall()` which simply marks the SignalConnection IDLE.

      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .

... peer 8
  For non-blocking `Dial()`s, it is a DialThread that calls the method but that is only a detail.

      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .
      .