Product Comparison · FISS Series
506F vs 505 Series: Which Fiber Enclosure Do I Need?
Direct answer: Choose the 506F for single-family FTTH drop demarcation: patch-first configurations up to 24 LC ports and slack storage for up to 50 ft of customer drop fiber. Choose the 505 for small MDU and splice applications: it merges the patch and patch-and-splice capabilities of the FET2 and 506F into a smaller enclosure that serves both MDU and single-family deployments.
Side-by-side comparison
| 506F Series | 505 Series | |
|---|---|---|
| Best for | Single-family FTTH drop demarcation and slack storage | Small MDU splice applications; mixed MDU/SFU deployments |
| Function | Patch configurations; 4-port plate adds 2-splice capacity | Patch and patch-and-splice in one unit |
| Port options | 4 / 6 / 12 / 24 (LC) adapter plates | Up to 4 ports |
| Slack storage | Up to 50 ft of customer drop fiber | Convenient flip down, splice tray accommodates 4 splices and fiber slack |
| Dimensions | 9.94″ W × 8.48″ H × 2.5″ D | Smaller footprint than 506F / FET2 5.63″ W x 8.098″ H 2.58″ D |
| Mounting | Pole or wall; indoor/outdoor | Wall; indoor/outdoor |
| Hardened connectors | Compatible adapter provision (entry port or internal bracket) | N/A |
| Notable accessories | ½″ grommet kits (RTK riser-tube compatible), cable entry clamp, ground stud | ½″ grommet kits, cable entry clamp, ground stud |
When the 506F is the right choice
Pick the 506F when the job is a standard FTTH drop: one enclosure per subscriber, pre-connectorized or field-terminated drops, and enough slack stored to re-terminate or relocate without a truck roll for new cable. Its corner slack retention is designed for “springy” OSP drop cable and buffer tubes, and the 4-port plate adds two fusion-splice positions when a spliced transition is needed.
When the 505 is the right choice
Pick the 505 when space is tight or the location mixes unit types — garden-style MDUs, duplexes, small multi-tenant buildings. It was designed to take the capabilities of the FET2 and 506F and adapts them in a smaller unit that merges patch and patch-and-splice functionality, so one SKU covers both the MDU and SFU requirements.
What if I need more than either offers?
For higher-count outdoor patch-and-splice demarcation (up to 48 drops), step up to the FET Series — the FET4G offers high-density modular cassettes. For speed-critical deployments, the 506R reeled dispenser rolls out pre-connectorized MicroDrop fiber and greatly reduces installation time. Browse the full family on the FISS Series page or find stock at a Tii Distributor.