LevelOne SFP-7331 Fast Ethernet 100 Mbps BiDi SFP Transceiver TX 1550 nm RX 1310 nm Simplex LC Single-Mode 20 km
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LevelOne
LevelOne SFP-7331 Fast Ethernet 100 Mbps BiDi SFP Transceiver TX 1550 nm RX 1310 nm Simplex LC Single-Mode 20 km
€34.25 inc. VAT
SFP-7331
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LevelOne SFP-7331 — 100 Mbps BiDi SFP, One Fibre, 20 km
100 MbpsSingle fibreTX 1550 · RX 1310Pairs with SFP-7321
The LevelOne SFP-7331 is a Fast Ethernet BiDi SFP transceiver that runs a 100 Mbps link over one single-mode fibre: it transmits at 1550 nm and receives at 1310 nm through a simplex LC connector, up to 20 km, with digital diagnostics. It is one half of a pair — the far end must be LevelOne’s SFP-7321, which uses the opposite wavelengths. In practice, BiDi optics are the answer when only one fibre strand is free between two buildings, or when leased dark fibre is charged per strand. Order both ends together, check the wavelengths are swapped, and use simplex single-mode LC cords.
Compatibility — check before buying:
This is a 100 Mbps module, not Gigabit: it works only in SFP ports that support 100 Mbps (100BASE-FX/BX) optics — most Gigabit SFP ports do not. You need one SFP-7331 and one SFP-7321; two SFP-7331 will not link. It uses a simplex LC connector on one single-mode strand. For Gigabit BiDi, see the SFP-9221 / SFP-9231 pair. Keep the dust cap on until you connect the fibre, and clean both connector ends before every mating — dirt is the most common cause of a link that will not come up. Not sure? Send us your switch model and the cable run and we check it before you order.
Best For
✓ 100 Mbps fibre links on one strand
✓ Older Fast Ethernet switches and converters
✓ Industrial and utility links up to 20 km
✓ Leased dark fibre charged per strand
✓ Media converters with 100M SFP slots
✓ Replacing a failed SFP-7331
Key Features
Fast Ethernet over 20 km
A 100 Mbps BiDi optic that carries a full-duplex link over a single single-mode strand up to 20 km.
One fibre, two wavelengths
A BiDi module sends on one wavelength and receives on another over a single single-mode strand, so one fibre does the work of two. The far end must be the opposite module, with the two wavelengths swapped.
Monitoring you can read
Digital diagnostics (SFF-8472) let the host report temperature, laser power and received light, so a dirty connector or a failing link shows up before users call.
Hot-swappable
Modules plug into a live port without shutting the switch down, so a link can be added or replaced during working hours. Seat it until it clicks and use the latch to remove it.
Technical Specifications
Frequently Asked Questions
Singular Expert Insight
We fit the SFP-7331 / SFP-7321 pair for Fast Ethernet links that must run on one strand, typically to media converters, older industrial switches or utility equipment. Check the host port supports 100 Mbps optics before ordering; if both ends can run Gigabit, the SFP-9221 / SFP-9231 pair is the better investment. Every order is backed by Singular’s local support in Cyprus — if a link will not come up, send us the port status and we help you find out whether it is the module, the cable or the configuration. Browse all transceivers or the switches they plug into.
Buyer’s Guide
Buy it if
You need a 100 Mbps link over a single single-mode fibre up to 20 km, and you order the SFP-7321 for the far end.
Skip it if
Your ports are Gigabit-only, you want Gigabit speed, or two fibres are free.
Also consider
LevelOne SFP-9221 for Gigabit BiDi.
Features - LevelOne - SFP-7331
More Details
Product Code
04:156955
EAN Code
4015867154748
Manufacturer
LevelOne