Chapter 2 Cisco Unity Concepts
Where Cisco Unity Stores Data
•Reliability: Because subscriber data is stored on the Cisco Unity server, Cisco Unity can answer calls, let outside callers look up subscriber extensions, and take messages even when the Domino or Exchange network is down. (When the Domino or Exchange network is unavailable, new messages are stored on the Cisco Unity server, and subscribers have access to those messages.)
•Scalability: SQL Server 2000 was designed to support the largest enterprise data processing systems, so there is more than enough room for storing the Cisco Unity data. Although MSDE has storage limitations that SQL Server does not, it is also more than adequate for the Cisco Unity configurations for which it is sold.
•Network Impact: Only a small subset of subscriber information needs to be stored in the directory, and that information does not change frequently. Therefore, directory replication caused by changes to Cisco Unity data is minimal after subscriber accounts have been created.
Some Subscriber Information Also Appears in the Domino Address Book or in Active Directory
A small amount of data that appears in the SQL Server 2000 database also appears in the Domino address book or in Active Directory. This information, mostly subscriber data (including the recorded voice name), is added to the directory to enable Cisco Unity servers to communicate with one another and to enable communication between Cisco Unity and other voice messaging systems. Cisco Unity uses a directory monitor to keep the data in the directory synchronized with the data in the SQL Server 2000 database.
Replicating data to the Domino address book or to Active Directory requires some changes to the directory. If the customer is using:
•Domino, IBM Lotus Domino Unified Communications (DUC) for Cisco must be installed on the Domino servers that will home Cisco Unity subscribers. This adds elements to the address book. In addition, DUC for Cisco must be installed on the client workstation for each Cisco Unity subscriber, which adds elements to the mail file for the client.
•Exchange, the Active Directory schema must be extended with a few Cisco
Enabling Cisco Unity Servers to Communicate with One Another
When two or more Cisco Unity servers are added to the same Domino address book or Active Directory forest, each Cisco Unity server serves a distinct group of subscribers. You can optionally configure the Cisco Unity servers to communicate with one another, which lets you administer subscriber accounts on all Cisco Unity servers from a single location and lets callers leave messages for any subscriber, regardless of the Cisco Unity server with which the subscriber is associated.
If you configure multiple Cisco Unity servers to communicate with one another, two types of
Cisco Unity data are stored in the directory:
•A primary location object for each Cisco Unity server. This unique identifier contains the addressing information that Cisco Unity needs to route messages to other Cisco Unity servers. The directory contains one primary location object for each Cisco Unity server in the Domino domain or Active Directory forest.
•Selected subscriber data. The stored properties include the Cisco Unity server with which each subscriber is associated, the subscriber extension, and a recording of the subscriber name.
Design Guide for Cisco Unity Release 5.x
| ||
|