Testing
LTPH-TP-1044-01, Issue 1
44
April 6, 2001
HXU-358 V1.04
Table 8.
System Loopback Definitions
Test Point
Loopback Definition
TLB3
(a)
(b)
(a) To perform this loopback command, the DS3 and T1/E1 ports can be in any mode other
than IN-SRVC.
(b) Copies data in both directions. All other loopbacks send AIS to a disconnected segment.
Terminal loopback to the customer at the DS3 line. Activate from the
HXU-358 Test menu.
FLB3
Facility loopback to the network at the DS3 line. Activate from the HXU-358
Test menu.
TLB1
Terminal Loopback to the network at the DSX-1 line. Activate from the
HXU-358 Test menu.
FLB1
Facility loopback to the customer at the DSX-1 line.
RFL
Remote facility loopback from the far end DS3 line. Activate from the
HXU-358 Test menu.
RTL
Remote terminal loopback from the far end DSX-1 line. Activate from the
HXU-358 Test menu.
CREM
Customer remote loopback is activated by selecting the line unit on the Shelf
Status Screen and then the Loopback Mode selection from the HLU
Maintenance Terminal Main Menu.
NLOC
Network local loopback is activated by selecting the line unit on the Shelf
Status screen and then the Loopback Mode selection from the HLU
Maintenance Terminal Main Menu.
CDUn
(c)
(c) The number of the doubler in the line from 1 to 4.
Customer doubler n loopback is activated by selecting the line unit on the
Shelf Status screen and then the Loopback Mode selection from the HLU
Maintenance Terminal Main Menu.
NDUn
Network doubler n loopback is activated by selecting the line unit on the Shelf
Status screen and then the Loopback Mode selection from the HLU
Maintenance Terminal Main Menu.
CLOC
Customer local loopback is activated by selecting the line of the Shelf Status
screen and then the Loopback Mode selection from the HLU Maintenance
Terminal Main Menu.
NREM
Network remote loopback is activated by selecting the line on the Shelf
Status Screen and then the Loopback Mode selection from the HLU
Maintenance Terminal Main Menu.
