MWI working

Answered Question
Feb 11th, 2008

Can someone please tell me the detailed call-flow of MWI ? How it integrates between CCM & Unity?

My main doubt is - after someone leaves a VM, how does Unity tell CCM that a message has arrived? I think CCM has to dial the MWI ON # to turn on MWI...

I have this problem too.
0 votes
Correct Answer by Jaime Valencia about 8 years 11 months ago

opss sorry, =) forgot i'm always logged in

when you have this issue just remove the partner from the url


  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 4.5 (2 ratings)
Jaime Valencia Mon, 02/11/2008 - 04:43

Think this paper has what you need

Message Waiting Indicators (MWIs)

the main flow of this is after the message arrives to exchange, exchange sends a TABLE_ROW_ADDED (you can use the MBXSuite to see this) event to the subscriber, this triggers the MWI behavior in unity and then unity uses one of it's out ports to send the MWI signal (you can use the port status monitor to see this)

in port status monitor you do not see if it's to set it on or off, you only see the Dialing MWI(DN) message

it hits one of the MWI DNs in CCM, which then dials the users DN and sets MWI on or off

VM ports reach MWI DNs, MWI DNs reach user DN

you can see all this in the traces but i think the link i posted is a good explanation without the need to read thru traces

BTW, the way this integrates is via skinny, think of the VM ports as virtual phones


UCBNOCWAN Mon, 02/11/2008 - 05:09

Hi Jamie,

Thanks for the simple explanation. Really hepls a lot.

I am not able to access the web-page though, could you please paste it's contents ( or the important parts) here?

Thanks & have a nice day.

UCBNOCWAN Mon, 02/11/2008 - 05:33


Thanks again. Appreciate it. Have a nice day.


Abhijit Das.


This Discussion