# Please help me with the Message Waiting Indication

**URL:** <https://community.asterisk.org/t/please-help-me-with-the-message-waiting-indication/8063>\
**Category:** Asterisk Support\
**Created:** [July 26, 2006, 5:43am UTC](https://community.asterisk.org/t/please-help-me-with-the-message-waiting-indication/8063 "2006-07-26T05:43:06Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![zigzagwu](https://avatars.discourse-cdn.com/v4/letter/z/a5b964/32.png) [@zigzagwu](https://community.asterisk.org/u/zigzagwu)\
**Post date:** [July 26, 2006, 5:43am UTC](https://community.asterisk.org/t/please-help-me-with-the-message-waiting-indication/8063/1 "2006-07-26T05:43:06Z")

</div>

I have one question about MWI, please help me find out the resolution.

According to the rfc3842, the subscriber send a SUBSCRIBE to server, the server will reply a NOTIFY to the subscriber for synchronizing state. The flow is:

```
       USER SERVER
          | |
          | SUBSCRIBE |

```

Request |----------------------------------\>|  
| 200 reply |  
|\<----------------------------------|  
| NOTIFY (sync) |  
|\<----------------------------------|  
| 200 reply |  
|----------------------------------\>|  
| |  
| |  
| NOTIFY (report) |  
|\<----------------------------------| Voice-mail changed.  
| 200 reply |  
|----------------------------------\>|  
| |  
| |  
| SUBSCRIBE |  
Refresh |----------------------------------\>|  
| 200 reply |  
|\<----------------------------------|  
| NOTIFY (sync) |  
|\<----------------------------------|  
| 200 reply |  
|----------------------------------\>|

But when our gateway communicating with ASTERISK server, the server doesn?t send NOTIFY to the gateway when it received the SUBSCRIBE request. So it can?t synchronize the mail-voice state all the time. In some case, the MWI is failed. The flow is:

```
       USER SERVER
          | |
          | SUBSCRIBE |

```

Request |----------------------------------\>|  
| 200 reply |  
|\<----------------------------------|  
| |  
| |  
| NOTIFY (report) |  
|\<----------------------------------| Voice-mail changed.  
| 200 reply |  
|----------------------------------\>|  
| |  
| |  
| SUBSCRIBE |  
Refresh |----------------------------------\>|  
| 200 reply |  
|\<----------------------------------|

Please help me, and give me your concern.  
If you can, please give me the asterisk normtive mwi flow.  
I am very appreciating for your reply.