In Chat Service, the server is the point to which users connect
to talk to each other. Each user runs a client program that
connects to the network through another program called a
server. Chat servers exist to pass messages from user to
user.
Exchange 2000 Chat servers, as well as each chat community on
each server, operate independently, using separate user lists and
channel lists. Each Exchange Chat server can host up to 20,000
concurrent users throughout an organization or around the
world.
The entrance to the server is a port. A port
number is assigned to each chat community connected to the Exchange
Chat server. The port number and the Domain Name
System (DNS) Internet Protocol (IP) address, identify
where the chat server receives communication from the chat
community. The default port number is 6667 (a chat industry
standard) and is usually assigned to the first chat community on
the Exchange Chat server. You can also use 7000. If these port
numbers are in use by other services, another port number is
assigned. Port numbers can range from 1 to 65535.