| Abbreviation | Definition |
|---|---|
| LTS | Laboratory for Telecommunication Sciences |
| LTT | Libyan Telecommunications and Technology |
| LTT | Local Transport Termination |
| LTU | Line Termination Unit |
| LUD | Local Usage Details |
| LUD | Look-Up Directory |
| LUL | Land Use Line |
| LULT | Line Unit/Line Termination |
| LUNT | Line Unit Network Termination |
| LVM | Line Verification Module |
| LVZ | Line Variance Zero |
| LWT | Listen While Talk |
| LXT | Local Exchange Terminal |
| LZ | Lempel-Ziv compression algorithm |
| M/W | MicroWave |
| MAE | Major Access Exchange |
| MAE | Metropolitan Area Exchange |
| MAG | Mobile Access Gateway |
| MAI | Multiple Access Interference |
| MAIO | Mobile Allocation Index Offset |