This attribute specifies whether end-to-end loopback insertion
should be performed on this connection.
When sameAsInterface is selected, the end-to-end loopback for the
connection is based on the endToEndLoopback attribute of the
connection's parent AtmIf componentif the ATM interface has
end-to-end loopback insertion turned on, then end-to-end loopback
insertion is also on for the connection.
When on or off is selected, end-to-end loopback insertion is turned
on or off respectively for the connection regardless of the
provisioning of the parent AtmIf component.
Note that end-to-end loopback insertion is not possible if the
connectionPointType attribute of the Vcc or Vpc component is
connectingPoint or segmentEndPoint. End-to-end loopback
insertion is also not possible if the distributionType of the Vcc is
pointToMultipoint. In such cases, the associated
endToEndLoopbackState attribute indicates notApplicable and end-
to-end loopback insertion is not performed. End-to-end loopback
insertion is always possible on a Vpt.