This object specifies the type of the interface and can also be used to delete the complete row and the corresponding interface. The following types are available: one-to-one Each X.25 Call sent to the interface will create a new isdn call. This leads to a one-to-one relation between ISDN and X.25 calls. multi-vc The first X.25 call sent to the interface will create a new isdn call established. The following calls will be sent to the same ISDN call as long as VCs (two way or outgoing) are available. Only if all VCs are used up, a new ISDN call will be established. In either case, multiple incoming X.25 calls are allowed according to the X25LinkPresetTable. The ISDN calls are cleared, as soon as the corresponding layer 2 Link has been cleared as specified in x25LkL2IdleTimer.