The Hapi MkIII MADI128V3 module includes an SFP cage support.
The small form-factor pluggable (SFP) is a compact, hot-pluggable network interface module used for both telecommunication and data communication applications.
List of Hapi MKIII supported modules/transceivers:
| Manufacturer | Model | Mode |
| Ubiquiti | UACC-OM-MM-1G-D-2 | Multi mode Fiber |
| FlexOptic | S.1303.2M.D-MSA01 | Multi mode Fiber |
| OEM | RME MADI SM | Single mode Fiber |