What is the Huawei 03031LXD?
The Huawei 03031LXD is a circuit board, listed by the manufacturer as "TNF1EX40 (TNF1EX4001), ENHANCED 40-CHANNEL MULTIPLEXING/DEMULTIPLEXING BOARD(C_ EVEN, 196.00THz~192.10THz, 100GHz, THERMAL AWG, LC).". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
