OID_ATM_SIGNALING_VPIVCI
The OID_ATM_SIGNALING_VPIVCI OID requests an ATM miniport driver to return the VPI and VCI to be assigned to the signaling VC as a structure of type ATM_VPIVCI, which is defined as follows:
typedef struct _ATM_VPIVCI {
ULONG Vpi;
ULONG Vci;
} ATM_VPIVCI, *PATM_VPIVCI;
The members of this structure contain the following information:
Vpi
The VPI of the signaling VC.Vci
The VCI of the signaling VC.
In an environment that supports more than one host per ATM switch port, a miniport driver may acquire (from the registry, for example) an assigned VPI/VCI for a signaling VC. A signaling VC is a VC that the call manager uses to send and receive signaling messages to and from network control components, such as a switch.
A call manager can request the assigned signaling VPI/VCI so that it can appropriately specify a signaling VC.
If the miniport driver does not have an assigned signaling VC to return to the call manager, it returns NDIS_STATUS_NOT_SUPPORTED.