| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | TP3404 |  212Kb/14P | Quad Digital Adapter for Subscriber Loops (QDASL) |
| TP3404V |  212Kb/14P | Quad Digital Adapter for Subscriber Loops (QDASL) |
 National Semiconductor ... | TP3401 |  249Kb/16P | DASL Digital Adapter for Subscriber Loops |
 National Semiconductor ... | TP3402 |  249Kb/16P | DASL Digital Adapter for Subscriber Loops |
 National Semiconductor ... | TP3403 |  249Kb/16P | DASL Digital Adapter for Subscriber Loops |
 National Semiconductor ... | TP3404V |  212Kb/14P | Quad Digital Adapter for Subscriber Loops (QDASL) |
 National Semiconductor ... | TP3406 |  234Kb/16P | DASL Digital Adapter for Subscriber Loops |
| TP3406V |  234Kb/16P | DASL Digital Adapter for Subscriber Loops |