| Abbreviation | Definition |
|---|---|
| MDF | Main Distribution Frame |
| MDM | Mobile Device Management |
| MDN | Mobile Directory Number |
| MDS | Mobile Data Service |
| MDS | Multipoint Distribution Service |
| MDTS | Mobile Data Terminal Software |
| MDU | Monthly Domestic Usage |
| ME | Mobile Equipment |
| MEAS | Measured Extended Area Service |
| MEET | Middle East Engineering and Telecommunications |
| MEH | Mobile Executed Handoff |
| MEID | Mobile Equipment IDentifier |
| MERS | Most Economical Route Selection |
| METRO | Metropolitan Extension Telecommunications Right Of |
| MF | Multiple Frequency |
| MFA | Multi-Frame Alignment |
| MFAS | Multi-Frame Alignment Signal |
| MFJ | Modified Final Judgement |
| MFN | Multiple Frequency Network |
| MFR | Multi-link Frame Relay |