Deploy Hirschmann SFP-FAST-BB MM/LC EEC Part Number 942204002 Opposite a Type A Module So Its 1550 nm Transmit and 1310 nm Receive Direction Completes the Link
Hirschmann SFP-FAST-BB MM/LC EEC Part Number 942204002 is the Type B member of a bi-directional Fast Ethernet multimode SFP pair. It transmits at 1550 nm, receives at 1310 nm and supports the listed route up to 2 km.
Type B completes the Type A circuit
Pair Hirschmann SFP-FAST-BB MM/LC EEC Part Number 942204002 with the compatible Type A multimode module that transmits at 1310 nm and receives at 1550 nm. The opposite wavelength roles are the basis of the one-fiber connection.
Label the endpoint containing Hirschmann SFP-FAST-BB MM/LC EEC Part Number 942204002 as the B side in drawings and port records. If both modules are replaced without preserving A/B placement, an apparently correct physical connection can remain down.
Multimode route evidence
Check the installed fiber grade and total loss before selecting Hirschmann SFP-FAST-BB MM/LC EEC Part Number 942204002. The catalog lists 2 km for the stated 50/125 um and 62.5/125 um conditions with a 16 dB budget.
Host diagnostics for Hirschmann SFP-FAST-BB MM/LC EEC Part Number 942204002 can report optical power and module temperature. Record those values at acceptance and compare them with the engineered route rather than judging performance only from a link LED.
| Product reference | Hirschmann SFP-FAST-BB MM/LC EEC Part Number 942204002 |
|---|---|
| Interface | 100 Mbit/s, LC |
| Fiber | Multimode 50/125 or 62.5/125 um |
| Distance | 0-2 km |
| Type B wavelengths | TX 1550 nm / RX 1310 nm |
| Link budget | 0-16 dB |
| Power | 1 W via switch |
| Temperature | -40 to +85 C |
| Form factor | SFP slot, IP20 |
Specify the B-side part number
Request Hirschmann SFP-FAST-BB MM/LC EEC Part Number 942204002 as part number 942204002 and list the Type A partner separately. The A and B items have similar names and mechanical appearance but different wavelength directions.
The -40 to +85 C rating of Hirschmann SFP-FAST-BB MM/LC EEC Part Number 942204002 is useful in industrial cabinets. Verify switch support, enclosure protection and fiber-component suitability before treating the complete connection as extended-temperature rated.

Hirschmann networking equipment reference photograph. The accessory or power supply described on this page is not represented by an exact product photograph.
Manufacturer specification: Hirschmann SFP-FAST-BB MM/LC EEC Part Number 942204002
