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Planning
Planning is critical to a successful deployment. Many deployment problems, growth problems, and capacity problems occur because not enough time is taken to carefully plan a deployment. Plan your IBM® Sametime® installation by determining features needed, reviewing system requirements, determining capacity requirements, and the servers and computers needed for your deployment.
System and infrastructure requirements
Sametime® system and infrastructure requirements include network planning, policy planning, password and parameter planning and planning for single sign-on.
Ports
IBM® Sametime® uses a number of ports. There are ports for connecting server to servers, clients to servers, and WebSphere Application Server ports to configure. The topics in this section list the default ports and their uses, and ports to open in firewalls. A range of ports means that the application can select any port in that range if one or more of those ports are already in use by other applications.
SIP Edge Proxy Server ports
The SIP Edge Proxy Server must be configured to use the same ports as the Sametime® SIP Proxy/Registrar.

SIP Edge Proxy Server ports

The SIP Edge Proxy Server must be configured to use the same ports as the Sametime® SIP Proxy/Registrar.

SIP Edge Proxy

Table 1. SIP Edge Proxy Server ports
Port	Purpose
The SIP Edge Proxy Server must listen on the same ports as the Sametime SIP Proxy/Registrar. For example, if the Sametime SIP Proxy/Registrar uses ports 5080/5081, the SIP Edge Proxy Server must also be configured with those ports.	Stand-alone server deployment
The WebSphere® Application Server proxy that the SIP Edge Proxy Server cluster is bound to, must listen on the same ports as the Sametime SIP Proxy/Registrar ports.	Clustered deployment