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20 CHAPTER 1: VCX SYSTEM MAINTENANCE OVERVIEW
■ One or two servers running the IP Messaging services
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 server running the Authentication and Directory Server
configuration
■ One server running the Call Records Server configuration
The other regional offices contain:
■ Two servers running the Call Server configuration
■ One or two servers running the IP Messaging services
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 server running the Authentication and Directory Server
configuration
■ Each branch office can operate with either a single IBM server or a
3Com V6000-series Integrated Branch server.
■ The IBM server can run either the IP Telephony and IP Messaging
configuration, or the IP Telephony configuration. The IP Telephony
and IP Messaging configuration enables each branch office to have
its own (local) IP Messaging service. 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-series Integrated Branch server runs the IP
Telephony and IP Messaging configuration which enables local IP
Messaging service.
As an alternative to the local or global messaging configuration options,
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.