Description: Indicates the current state at this side of the virtual circuit.

Options: stateReady (1):

SVC: Does not apply.

PVC: The PVC is configured. It remains in this state until a Restart Request or Restart Confirm is received. This means that the PVC is in limbo and cannot initiate its reset procedure until the restart procedure has completed. The restart procedure brings up the packet level at the port where the PVC exists.

stateConnecting (2)

SVC: The SAP has sent out a call and is waiting for a reply, or has received a call and is routing that call out to another SAP (lower or upper), and is also waiting for a reply.

PVC: Does not apply.

stateDataTransfer (3)

SVC: A connection has been accepted.

PVC: Reset procedure has been successful.

stateDisconnecting (4)

SVC: The SAP has sent out a clear and is waiting for a reply, or has received a clear and is routing that clear out to another SAP (lower or upper), and is also waiting for a reply. This state is only possible if the previous state was 'stateDataTransfer'.

PVC: Does not apply.

This following paragraph applies to the next three states: When a connection is established (SVC or PVC), a 'connection block' is assigned to each side of the connection. One side is always termed as the 'called' side and the other the 'calling' side. For a PVC, the source side is always the 'calling' and the destination side is always the 'called'. For an SVC, the side that receives the call is the 'calling' side, and the other is the 'called'. This makes sense since we are routing the call towards the called user.

stateResettingCgSide (5) SVC/PVC: A reset was received at the called side. The called side confirms the reset at its side, and a reset is also sent to the calling side. Both sides enter this state awaiting a confirmation at the calling side.

state ResettingCdSide (6) SVC/PVC: A reset is received at the calling side. The calling side confirms the reset at its side, and a reset is also sent to the called side. Both sides enter this state awaiting a confirmation at the 'called' side.

stateResettingBoth (7) SVC/PVC: This state is entered when a reset is generated internally at both the calling and called sides. Both sides enter the this state, each while waiting for a confirmation.