| Abbreviation | Definition |
|---|---|
| LRN | Local Routing Number |
| LRQ | Location ReQuest |
| LR-WPAN | Low-Rate Wireless Personal Area Network |
| LS | Loop Start |
| LSAP | Link Service Access Point |
| LSI | Loop Start Interface |
| LSMS | Local Service Management System |
| LSOA | Local Service Order Administration |
| LSP | Local Support Provider |
| LSR | Local Service Request |
| LSS | Line Sharing Service |
| LSS | Lucent Soft Switch |
| LT | Line Termination |
| LTA | Leased Transport Area |
| LTE | Line Terminal Equipment |
| LTE | Long Term Evolution |
| LTE | Long-Term Evolution |
| LTG | Local Telecommunications Grid |
| LTHI | Liberty Telecom Holdings Inc |
| LTHI | Liberty Telecoms Holdings Inc |