TN1876

LUCENT CARD - circuit pack used in legacy telecommunications infrastructure, specifically associated with the Alcatel-Lucent 1665 Data Multiplexer (DMX) and DMXtend platforms - Function: It typically serves as a DS1 electrical interface or a variant of a SONET/SDH circuit pack used for mapping DS1 signals into higher-speed SONET payloads like VT1.5.
Loopback Capability: The TN1876 includes a loopback feature that can be activated using SW5 on the board. This is a critical troubleshooting tool used to isolate problems by placing the system in loopback toward the switch.
Platform Compatibility:
Found in Alcatel-Lucent 1665 DMX and 1665 DMXtend shelves.
Used in conjunction with other connecting equipment like DFI circuit packs or DACS