3Com VCX V7000 Installation Manual page 18

18 C 1: P -I
HAPTER RE NSTALLATION
G
UIDELINES
One or two IBM X3650 servers running the IP Messaging services
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configuration. The number of servers depends on whether the
branch offices are configured with IP Messaging services or obtain
that service from the regional office.
One IBM X3650 server running the Authentication and Directory
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Server configuration
One IBM X3650 server running the Call Records Server
■
configuration
The other regional office:
Has the same configuration as above except that it does not
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contain a Call Records Server
Uses the Call Records Server running on the configuration above
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Each branch office can operate with an IBM X3250m2 server, a 3Com
V6000 (Analog) Integrated Branch server, or a V6100 (Digital)
Integrated Branch server.
The IBM X3250m2 server can run either the IP Telephony and IP
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Messaging configuration, or the IP Telephony configuration.
The IP Telephony and IP Messaging configuration enables each
branch office to have its own IP Messaging service (referred to as
local messaging).
The IP Telephony configuration requires that each branch office
obtain IP Messaging services from the regional office (referred to as
global messaging).
The 3Com V6000 (Analog) or V6100 (Digital) Integrated Branch
■
server runs the IP Telephony and IP Messaging configuration which
enables local IP Messaging service.
VCX software version 7.1 (and higher) supports Global Voicemail
Integration. Global Voicemail Integration links regional and branch office
IP Messaging servers through a universal mailbox directory on a special IP
Messaging server called the Global Voicemail Central Server (GVCS).
When enabled, Global Voicemail Integration allows a user to send, reply
to, and forward voicemail messages to any other mailbox in the system.
The GVCS does not carry IP Messaging traffic; it acts as a coordinator that
monitors mailbox activity (mailbox creation, modification, and deletion)
on each IP Messaging server in the system. For example, when a voice
mailbox is created on a branch office, the GVCS updates its global
directory and notifies all the other offices to update their local directories.