Answer call requests by pressing M-key
From Zenitel Wiki
| Event Owner: | A station or an UDP group |
| Event type: | 31 - M-key |
| Subevent: | 1 (M key status when station is idle) |
| When change to: | ON (M key pressed) |
| When related to: | (not used) |
| Action: | $MAILQ_NAVIG L%1.dir 8 |