| Abbreviation | Definition |
|---|---|
| LAS | Local Authentication Service |
| LATA | Local Access Transport Area |
| LAW | Local Area Wireless |
| LBS | Location Based Services |
| LBX | Low Bandwidth X |
| LC | Line Chaser |
| LC | Line Compressed |
| LC | Lost Connection |
| LCA | Line Circuit Address |
| LCAS | Link Capacity Adjustment Scheme |
| LCE | Line Controller Equipment |
| LCGN | Logical Channel Group Number |
| LCN | Logical Channel Number |
| LCR | Long Cable Run |
| LCT | Large Capacity Tandom |
| LCU | Line Control Unit |
| LD | Long Distance |
| LDB | Last Data Bit |
| LDC | LATA (Local Access Transport Area) Distribution Channel |
| LDC | Long Distance Charges |