Basic Communications Express Architecture

This basic Communications Express architecture provides Calendar, Address Book, and Mail modules in a web container on a single host. Messenger Express is the standalone web interface mail application that uses the HTTP service of the Messaging Server. Messenger Express is deployed on the same system as the Calendar and Address Book modules.

To provide this basic functionality, you need to install the following components:

• Directory Server

• Access Manager (If you are using Sun Java System LDAP Schema Version 2)

• Calendar Server

• Messaging Server

• Web Server or Application Server (for the web container)

In this example:

• You install the complete set of Messaging Server packages on the host that Communications Express is running on.

• The AddressBook server of Communications Express is configured to store its data in the LDAP directory infrastructure.

• SSL has not been configured.

Figure 24–1 shows the basic Communications Express architecture.

Figure 24–1 Basic Communications Express Architecture

The following table explains the protocols and port numbers used by this architecture.

Table 24–1 Protocols And Ports Used by Basic Communications Express Deployment Architecture

Protocol	Port	Used By
SMTP	25	Messaging Server MTA component to communicate with other systems, and Calendar Server (csenpd) components for email notifications
HTTP	80	Internet users to communicate with Communications Express front-end, and Communications Express to communicate with Messaging Server
HTTP	81	Calendar Express on Communications Express to communicate with Calendar Server
MSHTTP	82	Internet users to communicate with Messenger Express
LDAP	389	Messaging Server and Calendar Server to communicate with LDAP directory