### TCP/UDP Port Utilization

The 9600 Series IP Telephones use a variety of protocols, particularly TCP and UDP, to communicate with other equipment in the network. Part of this communication identifies which TCP or UDP ports each piece of equipment uses to support each protocol and each task within the protocol. For additional TCP/UDP port utilization information as it applies to Avaya Communication Manager, see UDP Port Selection.

Depending on your network, you might need to know what ports or ranges are used in the operation of 9600 Series IP Telephones. Knowing these ports or ranges helps you administer your networking infrastructure.

In Figure 1, Figure 2, and Figure 3:

- The box on the left always represents the 9600 Series IP Telephone.
- Depending on the diagram, the boxes on the right refer to various pieces of network equipment with which the telephone can communicate.
- Open-headed arrows (for example,
  ) represent the direction(s) of socket initialization.
- Closed-headed arrows (for example,
  ) represent the direction(s) of data transfer.
- The text the arrows point to identifies the port or ports that the 9600 Series IP Telephones support for the specific situation. Brackets identify ranges when more than one port applies. The text indicates any additional qualifications or clarifications. In many cases, the ports used are the ones called for by IETF or other standards bodies.
- Many of the explanations in the diagrams refer to system parameters or options settings,
  for example, DIRSRVR. For more information about parameters and settings, see Administering Options for the 9600 Series IP Telephones.

Figure 1: Signaling, Audio and Management Diagram

Figure 2: Initialization and Address Resolution Diagram

Figure 3: Applications Diagram