Hi,
LANs/WANs and bandwidth issues are a bit out of my area, but I can quote some documentation to you. Here you go.
Nancy
According to the Unity Design Guide:
"A Cisco Unity server can service a single physical site, meaning one or more well-connected LANs, such as a campus, single building, or other centralized facility where network bandwidth is not a problem."
And the Unity 4.2 System Requirements say:
(http://www.cisco.com/en/US/products/sw/voicesw/ps2237/prod_system_requirements_hardware09186a008061eb2a.html#wp472709)
"Network Requirements?Cisco Unity Unified Messaging
The Cisco Unity server must be connected to the network, so it has access to the message store, the directory, and network utilities.
Recommended minimum 100 Mbps connection.
The Cisco Unity server must be connected to the servers listed below over a high-speed IP network with minimal propagation delay and with proper Quality of Service guarantees for traffic between the components.
When Domino is the message store:
-The Domino server that Cisco Unity uses for importing subscribers and lists from the primary subscriber address book, and that it monitors for changes to the Domino directory.
-The Domino server to which Cisco Unity sends voice messages.
-Any Domino server on which Cisco Unity subscriber mailboxes are homed. "
