Description: Status of Remote Loopbacks received from the T1 network port. csu-lpbk-from-remote (1) indicates the node is in a Network Line Loopback state due to the reception of the CSU Loop-up pattern from the network. dsu-lpbk-from-remote (2) indicates the node is in a Network Line Loopback state due to the reception of the TyLink proprietary Loop-up pattern a remote node. pyl-lpbk-from-remote (3) indicates the node is in a Payload Loopback state due to the reception of the Facility Data Link's Loop-up pattern from the network (ESF only). csu-lpbk-sent-to-remote (4) indicates the node sent a csu loop up pattern to the remote. The node doesn't know if the loopback was accepted by the remote unit. dsu-lpbk-sent-to-remote (5) indicates the node sent a dsu loop up pattern to the remote. The node doesn't know if the loopback was accepted by the remote unit.