You've got one strand of fibre between two sites and you need both directions on it. The TP-Link ISM321A-20 does exactly that — 1000Base-BX WDM bi-directional over a single single-mode LC strand. No second cable, no extra trenching. Hot-pluggable into your industrial switch. DDM for remote health checks. Runs -40°C to 85°C. SFP-MSA compliant. Three-year warranty. Add to cart and save yourself the cost of a second fibre run
| brand | TP-Link |
| model | ISM321A-20 |
| type | Industrial SFP Module |
| standard | 1000Base-BX |
| technology | WDM Bi-Directional |
| fibre_type | Single-mode |
| connector | LC |
| operating_temperature | -40°C to 85°C |
| ddm | 1 |
| msa_compliant | 1 |
| hot_pluggable | 1 |
| warranty | 3-Year |
