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Design Guide for Cisco Unity Release 5.x
OL-14619-01
Chapter 2 Cisco Unity Concepts
Where Cisco Unity Stores Data
Because this information can be stored and changed in multiple locations, it must be regularly
synchronized. Cisco
Unity includes separate directory monitors for Domino and for Active Directory
that keep the directory synchronized with the SQL Server 2000 database. Every few minutes, the
directory monitor checks for new, changed, and deleted objects, and replicates the information.
When two or more Cisco Unity servers are added to the same Active Directory forest, a global catalog
monitor keeps the SQL Server 2000 database synchronized with the global catalog. This is how each
Cisco
Unity server gathers information on subscribers who are associated with other Cisco Unity
servers.
Because the amount of data stored in the directory is so small, the impact of replication between the SQL
Server 2000 database and the directory is minimal (except when the first Cisco
Unity subscribers are
created by importing them in bulk from Exchange or from a text file).
Messages from Outside Callers Are Temporarily Stored on the Cisco Unity
Server
All messages from outside callers are temporarily stored on the Cisco Unity server before they are
forwarded to Domino or Exchange for storage in the subscriber mailbox. This allows Cisco
Unity to
continue functioning when the network connection between the Cisco
Unity server and the Domino or
Exchange servers is down, or when one or more Domino or Exchange servers are down.
While Domino, Exchange, and/or the network is offline, Cisco Unity can still answer calls, allow outside
callers to look up subscriber extensions, and record voice messages. During this time, subscribers who
check their voice messages hear the Unity Messaging Repository (UMR) conversation, which explains
that their Domino or Exchange server is not available, but lets them access voice messages left after the
problem started. When the Domino server, Exchange server, and/or the network is back on line, the voice
messages that were stored in the UMR are routed to the subscriber mailboxes. (In some cases when a
network connection or a Domino or Exchange server is down, subscriber-to-subscriber messages are also
treated as outside caller messages and stored on the Cisco
Unity server until they can be delivered to the
appropriate mailbox.)
Some Subscriber Information and Configuration Settings Are Stored on the
Cisco
Unity Server
Selected recordings and configuration settings are stored in files on the Cisco Unity server, including
subscriber greetings (“Hi, this is Pat and I am out of the office today...”), recorded voice names, and some
phone system integration settings.
Some Configuration Settings Are Stored in the Registry
Selected server-specific configuration settings are stored in the Windows registry, including some phone
system integration and logging settings.