Other Network Considerations
This capability also has the advantage of making station number portability easier. Assume a situation where the company has multiple locations in London and New York, all sharing a corporate IP network. Users want to take their telephones from their offices in London and bring them to New York. When users start up their telephones in the new location, the local DHCP server usually routes them to the local call server. With proper administration of the local DHCP server, the telephone knows to try a second call server IP address, this one in London. The user can then be automatically registered with the London call server.
Chapter 5: Server Administration contains details on administration of DHCP servers for lists of alternate media servers, router/gateways, and HTTP/HTTPS servers. For more information, see DNS Addressing on page 76.
TCP/UDP Port Utilization
The 1600 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 Aura Communication Manager, see UDP Port Selection on page 34.
Depending on your network, you might need to know what ports or ranges are used in the operation of 1600 Series IP Telephones. Knowing these ports or ranges helps you administer your networking infrastructure.
In Figure 1 and Figure 2:
●The box on the left always represents the 1600 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.
●
) represent the direction(s) of socket initialization.
●
) represent the direction(s) of data transfer.
●The text the arrows point to identifies the port or ports that the 1600 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.
Issue 5 April 2010 27
