| Manufacturer | QOLTEC |
| Type of transition | attenuator |
| Ver. | single mode (SM) |
| Symbol | Structure | Connector colour | Damping coefficient |
|---|---|---|---|
| [dB] | |||
| QOLTEC-54177 | LC/UPC; both sides; female | blue | 2 |
| QOLTEC-54178 | LC/UPC; both sides; female | blue | 3 |
| QOLTEC-54179 | LC/UPC; both sides; female | blue | 5 |
| QOLTEC-54180 | LC/UPC; both sides; female | blue | 8 |
| QOLTEC-54181 | LC/UPC; both sides; female | blue | 10 |
| QOLTEC-54182 | LC/UPC; both sides; female | blue | 15 |
| QOLTEC-54183 | LC/UPC; male; female | blue | 2 |
| QOLTEC-54184 | LC/UPC; male; female | blue | 3 |
| QOLTEC-54186 | LC/UPC; male; female | blue | 8 |
| QOLTEC-54187 | LC/UPC; male; female | blue | 10 |
| QOLTEC-54188 | LC/UPC; male; female | blue | 15 |
| QOLTEC-54189 | SC/UPC; both sides; female | blue | 2 |
| QOLTEC-54190 | SC/UPC; both sides; female | blue | 3 |
| QOLTEC-54191 | SC/UPC; both sides; female | blue | 5 |
| QOLTEC-54192 | SC/UPC; both sides; female | blue | 8 |
| QOLTEC-54193 | SC/UPC; both sides; female | blue | 10 |
| QOLTEC-54194 | SC/UPC; both sides; female | blue | 15 |
| QOLTEC-54195 | male; SC/UPC; female | grey | 2 |
| QOLTEC-54196 | male; SC/UPC; female | grey | 3 |
| QOLTEC-54197 | male; SC/UPC; female | grey | 5 |
| QOLTEC-54198 | male; SC/UPC; female | grey | 8 |
| QOLTEC-54199 | male; SC/UPC; female | grey | 10 |
| QOLTEC-54200 | male; SC/UPC; female | grey | 15 |