The TP-Link SM321B is a Gigabit WDM SFP transceiver designed to provide reliable fibre connectivity over a single fibre strand. Used alongside the matching SM321A module, it enables bi-directional data transmission, helping reduce cabling requirements and maximise existing fibre infrastructure.
Supporting Gigabit Ethernet speeds, the SM321B delivers stable, high-performance connectivity for business networks, campus deployments, and building-to-building links. Its compact SFP form factor allows for easy integration with compatible switches, routers, and media converters.
With hot-swappable support, the SM321B can be installed or replaced without disrupting network operation. It offers a practical and cost-effective solution for extending fibre networks while reducing deployment costs and simplifying installations.
Features
- WDM Bi-Directional SFP Module
- Supports WDM Bi-Directional technology, using a single strand of fibre, cost saving
Manuals & Datasheets
Technical
| Media Converter & Module | |
|---|---|
| Standards & Protocols | IEEE 802.3z, TCP/IP |
| Wave Length | RX: 1550 nm TX: 1310 nm |
| Dimensions (W x D x H) | 2.2 x 0.6 x 0.5in (55.4 x 14.6 x 12.9mm) |
| Power Supply | 3.3V |
| Safety & Emission | FCC, CE |
| Cable | Single-Mode Fibre |
| Fibre Type | 9/125µm Single-Mode |
| Max. Cable Length | 20km |
| Data Rate | 1.25Gbps |
| Port Type | LC Simplex |
| Hardware Features | DDM SFP-MSA Hot Swappable |
| Package Content | SM321B Installation Guide |
| Environment | Operating Temperature: 0°C ~ 70°C (32°F ~ 158°F) Storage Temperature: -40°C ~ 85°C (-40°F ~ 185°F) Operating Humidity: 10% ~ 90% RH non-condensing Storage Humidity: 5% ~ 90% RH non-condensing |