The switch of periodic handshake between the device and the NMS.
The NMS uses the periodic handshake process to check whether
the device is properly connected.
Default: false
Options:
1.nooperation(0) -default shakes hands of the system
2.true(1) -The device periodically shakes hands with the NMS
3.false(2) -The device does not periodically shake hands with the NMS