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Sizing the system
101-1620-005 2-15
Types of operations The Octel Unified Messenger voice servers open data streams between
voice servers and:
n Exchange servers.
n Client systems.
The actual Exchange server associated with each data stream depends on
the operation and, in some cases, the associated mailbox:
n The operation of telephone answering results in the establishment
of a data stream between the voice server and the voice server’s
peer e-mail server.
n The following operations result in the establishment of a
connection between the voice server and the Exchange server
containing the mailbox of the relevant subscriber:
— Playing back a voice message over the telephone.
— Recording a voice message to be sent to another subscriber.
— A caller listening to one of the subscriber's prerecorded
greeting messages.
It is possible, using the information above, to calculate the worst-case and
normal throughput requirement for each voice server and Exchange server
pairing.