dsx3PortConfigNatUse 1.3.6.1.4.1.800.2.11.2.1.1.7

The object indicates current state of National Use Bit which is bit 12 of G.751 frame. This object only applies to E3 port which line framimg is configured to G.751. A value of one(1) is returned for other sublayers or DS3 port.