As a user of OCS 2007 you have the ability to receive Missed Call Notifications. How the Missed Call Notification is generated depends on the configuration of the user in question. Let's examine the different options.
Enterprise Voice with Exchange 2007 SP1 Unified Messaging (UM)
As an Enterprise Voice enabled user with voice mail coming from Exchange 2007 SP1 UM you can receive Missed Call Notifications and Voice Mails in your Exchange 2007 mailbox, when someone has tried to call you from either Office Communicator 2007 (OC), Office Communicator 2007 Phone Edition (OCPE) or from the PSTN/PBX. The Missed Call Notifications and Voice Messages are generated by Exchange 2007 SP1 UM.
The Missed Call Notifications can be generated in two ways depending on the state of the call when the caller hangs up. The states, for a user online with OCS 2007 and without call forwarding active, are:
- OCS 2007 rings all registered end-points for the user
- After a user defined time-out the call is forwarded to Exchange 2007 SP1 UM
- Exchange 2007 SP1 UM connects the call and plays the greeting and ask the user to leave a voice mail
- The voice mail is recorded and sent
If the caller hangs up in state 1 or 2 the call is still under control by OCS 2007. OCS 2007 will process the hang up and send a SIP INFO message to Exchange 2007 SP1 UM and instruct it to send a Missed Call Notification message to the called user. The SIP INFO message contains information about who is calling and who is called. Exchange 2007 SP1 UM will do reverse number lookup in AD and the called user's Outlook Contacts and will generate the Missed Call Notification message.
If the caller hangs up in state 3 the call is under control by Exchange 2007 SP1 UM and Exchange 2007 SP1 UM will do reverse number lookup in AD and the called user's Outlook Contacts and will generate the Missed Call Notification message.
If the call is in state 4 the called user will only a receive a Voice Mail message and no Missed Called Notification.
If the user is offline or with call forwarding set directly to Voice Mail the call will be routed directly to Exchange 2007 SP1 UM and go to state 3 in the above list.
Enterprise Voice without Exchange 2007 SP1 UM or Remote Call Control
As an Enterprise Voice enabled user without voice mail or a Remote Call Control user you can receive Missed Call Notifications in your Exchange mailbox. The Missed Call Notification is generated by OC 2007 via MAPI. The Missed Call Notification is only generated when OC 2007 is running. Microsoft Outlook does not need to be running.
Enterprise Voice with PBX Integration
As an Enterprise Voice with PBX Integration enabled user the generation of Missed Called Notification is the responsibility of the PBX system. OCS 2007 and OC 2007 will not generate Missed Call Notifications.