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Networking Guide for Cisco Unity Release 5.x (With Microsoft Exchange)
OL-13844-01
Chapter 3 Cross-Server Logon, Transfers, and Live Reply
Overview of Cross-Server Logon, Transfer, and Live Reply
Why Cross-Server Transfer Is Needed
In installations with multiple Cisco Unity servers networked via Digital Networking, the number that
Cisco Unity uses for call transfers to a subscriber is the only number replicated among the Cisco Unity
servers; none of the other call transfer and screening settings are replicated. For example, in Figure 3-1,
call transfers are set to ring the subscriber at the number 9,5551212. The only call transfer setting that
is replicated to other Cisco Unity servers is the call transfer number 9,5551212. If the setting was instead
“Yes, Ring Subscriber’s Extension,” the number 3047 would be replicated.
Figure 3-1 Only the Call Transfer Number Is Replicated
When the call transfer setting is set to “No (Send Directly to Subscriber’s Greeting),” the call transfer
number is automatically set to the subscriber extension (3047 in the example in Figure 3-1), which is
replicated to the other networked Cisco Unity servers.
Without cross-server transfer, call transfers to subscribers whose accounts were created on other
Cisco Unity servers are always handled by the phone system (release to switch)—rather than by
Cisco Unity (supervised transfer)—even if the subscribers are set up for supervised transfers (as in the
example in Figure 3-1). On a release to switch transfer, Cisco Unity dials the call transfer number
configured for the subscriber and hangs up, leaving the phone system to handle the call. Note the
following limitations with release to switch transfers:
• The subscriber call screening, call holding, and announce features are ignored.
• The call transfer setting “No (Send Directly to Subscriber's Greeting)” is ignored. Cisco Unity dials
the subscriber extension and hangs up. If the subscriber extension is a valid extension on the phone
system that Cisco Unity is integrated with, the subscriber phone rings. If the subscriber extension is
not a valid phone extension, what happens to the call after that depends on the phone system and
how it is configured. If you do not configure the phone system to handle calls to the subscriber
extensions, the caller may be disconnected.