Alcatel-Lucent 1665 DMX allows technicians to perform loopback tests on all low- and high-speed interfaces. Low-speed DS1, DS3, E1, and EC-1 electronic loopbacks, directed toward the high-speed line (terminal loopback), are individually controllable from the CIT or the OS interface. Active electronic loopbacks are shown by the ABN LED on the SYSCTL faceplate and in the alarm and status report. EC-1, E1, DS1, DS3, and Ethernet facility loopbacks toward the DSX are also available.
Alcatel-Lucent 1665 DMX supports facility, terminal and manual optical loopbacks.
Alcatel-Lucent 1665 DMX supports facility optical loopbacks on high-speed OC-3/12/48/192 ports and low-speed OC-3/12/48/192 ports.
Alcatel-Lucent 1665 DMX supports facility optical loopbacks on high-speed OC-3/12/48/192 ports and low-speed OC-3/12/48/192 ports.
Front access to the optical connectors on the optical line interface unit (OLIU) circuit pack allows easy manual optical loopback. This loopback is performed by connecting a fiber jumper from the OLIU circuit pack output to its input. In some cases a lightguide build-out assembly is required to prevent receiver overload when performing loopbacks.
Alcatel-Lucent 1665 DMX supports terminal and facility loopbacks on DS1, E1 and DS3 interfaces.
Beginning in Release 9.1, Ethernet loopbacks are allowed even when Remote Client Fail (RCF) or Far End Failure Indicator (FEFI) is active.
Alcatel-Lucent 1665 DMX supports terminal loopbacks on all Ethernet interfaces.
Alcatel-Lucent 1665 DMX supports facility loopbacks on the LNW78 and LNW170. Facility loopbacks are supported on both individual ports and Link Aggregation Groups (LAGs). Loopbacks on LAGs are permitted simultaneously for both ports in the group because they are treated as failed members allowing transmission on unlooped members. If a facility loopback is set up on a LAG, alarms are suppressed on both the member ports and the LAG.
Beginning in Release 9.1, ENT-SYS supports a new parameter, loopback port check (lpbk_port_ck). The parameter controls how loopbacks are handled for PDH, EC1 and Ethernet ports based on the state of those ports.
DISABLE (default): The execution of loopbacks for PDH, EC1 and Ethernet ports ignores the value of cmdmode in OPR-LPBK.
ENABLE: The execution of loopbacks for PDH, EC1 and Ethernet ports is a function of the respective port’s primary state and the value of cmdmode in OPR-LPBK. If cmdmode=NORM, the loopback is denied unless the port is out of service. If cmdmode=FRCD, the loopback executes irrespective of port state.
Note:
This parameter does not affect loopback operation for OC-n lines.
Technicians can use the internal testing capabilities for installation and manual troubleshooting. The DS1 and DS3 test signal generators and detectors are integrated into the system, eliminating the need for external test equipment to perform transmission tests.
Alcatel-Lucent 1665 DMX also allows technicians to test specific system components. In addition to the automatic diagnostics, Alcatel-Lucent 1665 DMX provides tests for LEDs, office alarms, and the SYSCTL circuit pack.
| November 2011 | Copyright © 2011 Alcatel-Lucent. All rights reserved. |