| 术语 | 描述 |
|---|---|
| AGA Air-Ground-Air | Air-Ground-Air communication. |
| AI Air Interface | The radio interface between the mobile station and the base station. |
| AL Ambience Listening | A feature that allows a user to listen to the ambient sounds around another user's terminal. |
| AMR Adaptive Multi-Rate | A speech coding standard used in TETRA. |
| ANF Additional Network Feature | A feature that enhances the basic network functionality. |
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