| Abbreviation | Definition |
|---|---|
| KPT | Kenya Posts and Telecommunications |
| KSPS | KiloSymbols Per Second |
| KT | Korea Telecom |
| KTA | Kentucky Telecom Association |
| KTF | Korea Telecom Freetel |
| KTL | Killarney Telecommunications Ltd |
| KTR | Karachi Telecom Region |
| LAAS | Local Area Augmentation System |
| LAC | Line Assignment Center |
| LACNIC | Latin American and Caribbean Internet Address Registry |
| LACNIC | Latin American and Caribbean Network Information Centre |
| LADS | Local Area Data Service |
| LADT | Local Area Data Transport |
| LAG | Link Aggregation Group |
| LAIS | Line Alarm Indication Signal |
| LAN | Local Access Number |
| LANE | Local Area Network Emulation |
| LAPB | Link Access Protocol Balanced |
| LAPD | Link Access Procedure D channel |
| LAP-D | Link Access Protocol-D channel |