DIRECT ANSWER
The selection rule
Use compact FTTH drop cable for the final subscriber or premises-access segment. Use a multi-core outdoor loose-tube cable such as GYTA for feeder or distribution routes when its quoted construction fits the pathway. Select an armored construction such as GYTA53 when the confirmed route requires greater mechanical protection or direct-burial capability.
Where each fiber-cable family typically fits
The construction descriptions below are typical industry distinctions, not a substitute for the ordered datasheet. Confirm the strength member, moisture barrier, armor, sheath, fire behavior and installation method for the quoted SKU.
| Family | Typical role | Construction boundary | Do not assume |
|---|---|---|---|
| FTTH drop cable (GJXH/GJXFH family) | Compact final access or subscriber drop | Low fiber count with compact strength-member arrangement | That it replaces a multi-core outdoor feeder cable |
| GYTA family | Outdoor feeder or distribution route | Typical loose-tube, moisture-blocked outdoor construction with metallic barrier | That every GYTA construction is approved for direct burial |
| GYTA53 family | Outdoor route requiring greater mechanical protection | Typical inner sheath plus steel-tape armor and outer sheath | That route suitability is proven without installation and datasheet review |
Start with the route and installation method
Describe where the cable enters and exits buildings, how it is supported or buried, and which hazards are present. A route can require more than one cable construction.
- Duct, aerial, tray, façade, indoor transition or direct-buried segment.
- Pulling tension, crush, rodent, moisture, UV and temperature exposure.
- Required fiber grade, core count, spare capacity and maximum section length.
- Local fire or sheath requirement at building entry and indoor sections.
- Joint closures, distribution boxes, termination hardware and connector plan.
Fiber-cable RFQ information
Where performance values matter, request them on the quoted datasheet and align the test or inspection record with that exact construction.
| Field | Examples |
|---|---|
| Route | Duct, aerial, protected tray, direct burial, indoor/outdoor transition |
| Fiber | OS2, core count, color code and spare-fiber requirement |
| Mechanical | Tensile, crush, bend and armor requirement |
| Environment | Water blocking, UV, temperature, rodent or chemical exposure |
| Delivery | Length per drum, total quantity, drum marking and destination |
| Documents | Quoted datasheet, test record and destination-specific declaration |