| HC-5504B | EIA/ITU PABX SLIC with 40mA Loop Feed | Datasheet*) |
| HC-5504B1 | ITU Low Cost, PABX SLIC With 40mA Loop Feed | Datasheet*) |
| HC-5504 | EIA/ITU PABX SLIC with 40mA Loop Feed | Datasheet*) |
| HC1-5504B-5 | EIA/ITU PABX SLIC with 40mA Loop Feed | Datasheet*) |
| HC1-5504B-9 | EIA/ITU PABX SLIC with 40mA Loop Feed | Datasheet*) |
| HC3-5504B-5 | EIA/ITU PABX SLIC with 40mA Loop Feed | Datasheet*) |
| HC3-5504B-9 | EIA/ITU PABX SLIC with 40mA Loop Feed | Datasheet*) |
| HC4P5504B-5 | EIA/ITU PABX SLIC with 40mA Loop Feed | Datasheet*) |
| HC4P5504B-9 | EIA/ITU PABX SLIC with 40mA Loop Feed | Datasheet*) |
| HC9P5504B-5 | EIA/ITU PABX SLIC with 40mA Loop Feed | Datasheet*) |
| HC9P5504B-9 | EIA/ITU PABX SLIC with 40mA Loop Feed | Datasheet*) |
