![]() ![]() Ethernet facility loopbacksĪlcatel-Lucent 1665 DMX supports facility loopbacks on the LNW78 and LNW170. Ethernet terminal loopbacksĪlcatel-Lucent 1665 DMX supports terminal loopbacks on all Ethernet interfaces. Ethernet loopbacksīeginning in Release 9.1, Ethernet loopbacks are allowed even when Remote Client Fail (RCF) or Far End Failure Indicator (FEFI) is active. DS1, E1, DS3 loopbacksĪlcatel-Lucent 1665 DMX supports terminal and facility loopbacks on DS1, E1 and DS3 interfaces. In some cases a lightguide build-out assembly is required to prevent receiver overload when performing loopbacks. This loopback is performed by connecting a fiber jumper from the OLIU circuit pack output to its input. Manual loopbacksįront access to the optical connectors on the optical line interface unit (OLIU) circuit pack allows easy manual optical loopback. ![]() Terminal loopbacksĪlcatel-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. Facility loopbacksĪlcatel-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. Optical loopbacksĪlcatel-Lucent 1665 DMX supports facility, terminal and manual optical loopbacks. EC-1, E1, DS1, DS3, and Ethernet facility loopbacks toward the DSX are also available. Active electronic loopbacks are shown by the ABN LED on the SYSCTL faceplate and in the alarm and status report. 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. Alcatel-Lucent 1665 DMX allows technicians to perform loopback tests on all low- and high-speed interfaces.
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