Description
3Com 1668-400-000-1 TCUR Fiber Optic Transceiver Network Module Card Tx/Rx
The 3Com 1668-400-000-1 is a TCUR (Transceiver Unit) fiber optic module card designed for use in compatible 3Com chassis-based networking equipment. The card provides fiber optic connectivity via dedicated Tx (transmit) and Rx (receive) ports on a metal bracket faceplate, along with an Rx Loss indicator LED for link monitoring. The PCB is built around Motorola ECL (Emitter-Coupled Logic) line driver and receiver ICs, a common architecture for high-speed fiber optic interface circuitry of this era.
Specifications & What's Included
- Manufacturer: 3Com
- Part Number: 1668-400-000-1
- Module Type: TCUR Fiber Optic Transceiver Module Card
- Fiber Ports: Tx (Transmit) and Rx (Receive) — proprietary/ST-style fiber optic connectors on metal bracket
- Rx Loss Indicator: LED on bracket faceplate for signal loss detection
- Main ICs: Motorola MC10115P, MC10117P, MC10116P (ECL line receivers/drivers)
- Logic ICs: 74HCT14N (hex Schmitt inverter), 74HCT123N (dual monostable multivibrator)
- Board Sub-Assembly Label: 161-000-1.00 A0238
- Form Factor: Module/expansion card with metal bracket
- Includes: Card only — no fiber cables or accessories
Applications
This type of fiber optic transceiver module was used in 3Com's modular chassis-based networking systems, providing fiber uplink or backbone connectivity within enterprise LAN and campus network environments. TCUR-type modules slot into compatible 3Com chassis devices to add or extend fiber optic ports, allowing copper-to-fiber conversion or fiber-to-fiber connections within a hub, switch, or concentrator stack. Fiber modules of this design were particularly common in late-1980s through mid-1990s enterprise networking deployments, where 10BASE-F or proprietary fiber standards were used to span longer distances between wiring closets or buildings than copper Ethernet permitted. This card would be of interest to technicians maintaining legacy 3Com chassis equipment or collectors of early-generation networking hardware.
This 3Com 1668-400-000-1 TCUR Fiber Optic Transceiver Module Card was pulled from a working network environment where it had been in active use. It has been visually inspected and photographed. The card shows normal light wear consistent with its age and previous use. The fiber Tx and Rx ports on the bracket appear clean and undamaged. Please review our full photo set — including the close-up of the PCB and bracket — and contact us with any questions before purchasing.
Warranty Information
Additional Information
Brand: |
3Com |
Model: |
1668-400-000-1 |
MPN: |
1668-400-000-1 |
Secondary Model: |
TCUR |
SKU: |
34143 |
Type: |
Fiber Optic Transceiver Module Card |
Interface Type: |
Fiber Optic |
Ports: |
Tx (Transmit), Rx (Receive), Rx Loss Indicator |
Chipset: |
Motorola MC10115P, MC10117P, MC10116P (ECL logic) |
Logic ICs: |
74HCT14N, 74HCT123N |
Form Factor: |
Module Card / Expansion Card |
Seller Notes: |
Card only — no cables or accessories included. |
Country/Region of Manufacture: |
United States |
Condition Notes: |
This 3Com 1668-400-000-1 TCUR Fiber Optic Module was pulled from a working network environment. Visually inspected; shows normal light wear. Tx and Rx fiber ports appear clean and undamaged. Please view photos and contact us with questions. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |
