Initialization Process; Step 1: Telephone To Network; Step 2: Dhcp Server To Telephone; Step 3: Telephone And Tftp Server - Avaya
4600 Series Administrator's Manual

The TFTP server provides the 4600 Series IP Telephone with a script file and, if appropriate, new
or updated application software (see
Initialization Process, on page
customize telephone parameters for your specific environment (see
4600 Series IP Telephones, on page

Initialization Process

The following is a high-level description of the information exchanged when the telephone is
initializing and registering. This description, which assumes all equipment is properly administered
ahead of time, may be helpful in explaining how the 4600 Series IP Telephones relate to the
routers and servers in your network.

Step 1: Telephone to Network

The telephone is appropriately installed and powered. After a short initialization process, the
telephone identifies the LAN speed and sends a message out into the network, identifying itself
and requesting further information. A router in the network receives this message and relays it to
the appropriate DHCP server.

Step 2: DHCP Server to Telephone

The DHCP server provides information to the telephone, as described in
Servers, on page 2-8. Among other data passed to the telephone is the IP address of the TFTP
server, which is crucial for the next step.

Step 3: Telephone and TFTP Server

The telephone queries the TFTP server, which transmits a script file to the telephone. This script
file, at a minimum, tells the telephone which application file the telephone should be using (the
application file is the software that has the telephony functionality, and can be easily updated for
future enhancements).
The telephone uses the script file to determine if it has the proper application file. A newly-installed
telephone may have no application file, and hence may not have the proper one. A previously-
installed telephone may or may not have the proper application file. In any event, if the telephone
determines it does not have the application file the script file says the telephone should have, the
telephone requests a download of the proper application file from the TFTP server. The TFTP
server then downloads the file and conducts some checks to ensure the file was downloaded
properly. If the telephone determines it already has the proper file, it proceeds to the next step
without downloading the application file again.
Step 3: Telephone and TFTP Server, on page 2-9
2-9). In addition, you can edit an associated settings file to
4-28).
Overview of Voice over IP (VoIP)
Administering Options for the
2
2
2
DHCP and TFTP
2
Initialization Process
under
2-9