| Abbreviation | Definition |
|---|---|
| MUTO | Multi-User Telecommunications Outlet |
| MUTOA | Multi User Telecommunication Outlet Assembly |
| MUTOA | Multi User Telecommunications Outlet Assembly |
| MUTOA | Multi-User Telecommunications Outlet Assembly |
| Muxing | Multiplexing |
| MVL | Multiple Virtual Lines |
| MVNO | Mobile Virtual Network Operator |
| MVPD | Multichannel Video Programming Distributor |
| MWN | My Wirefree Network |
| MX | Multiplex |
| N(R) | Receive Sequence Number |
| N(S) | Send Sequence Number |
| NA | Not Answered |
| NAAD | National Alert Aggregation and Dissemination |
| NAC | Natural Area Code |
| NAC | Notification Applience Circut |
| NADH | North American Digital Hierarchy |
| NAL | Name And Location |
| NAMPS | Narrow band Advanced Mobile Phone Service |
| N-AMPS | Narrowband Advanced Mobile Phone Service |