3Com V7000 - page 20

20 CHAPTER 1: VCX SYSTEM CONFIGURATION 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 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 Integrated Branch server runs the IP Telephony
and IP Messaging configuration which enables local IP Messaging
service.
With version 7.0 and higher, you can set up IP Messaging in a
client/server configuration. An IP Messaging server can support up to 20
IP Messaging clients. One client can be dedicated to non-voice
applications such as Web provisioning, e-mail synchronization, and
logging. The remaining clients can be dedicated to voice functions. This
type of setup diverts the stream of voice traffic and improves the IP
Messaging server performance. Clients should be located on the subnet
with both management servers or have a minimum of 200 Mbps IP
backbone on a dual subnet network configuration. See the IP Messaging
Operations and System Administration Guide for details.