Nortel 2033 Installation And Operation Manual page 572

Page 572 of 600
Pre-download checklist
553-3001-368 Standard 20.00
Appendix H: TFTP Server
• The IP Phone attempts to connect to the TFTP Server. If the TFTP Server
is offline, unreachable, or no connection is made, the IP Phone uses its
existing version.
• The firmware downloading process takes about 30 seconds.
• The TFTP Server must be capable of supporting multiple TFTP sessions.
• When the IP Phone makes a TFTP request, it uses filenames without a
full path name. Therefore, firmware updates for the IP Phones must be
installed on the root directory of the TFTP Server.
When the firmware is uploaded to the TFTP Server, the files must be
unzipped. Allow time for the TFTP Server to refresh. Monitor the TFTP
Server for any errors. The TFTP Server can be located anywhere on the
network if the IP Phones have the subnet mask and default IP gateway
configured correctly. However, the IP Phone expects a response within two
seconds to any TFTP Server request. Therefore, the TFTP Server should not
be located, for example, at the other end of a slow WAN link.
If too many IP Phones attempt to download new software simultaneously, it
can cause the downloads to slow down or return error messages. To reduce
the number of retries and error messages, manage the download process by
staggering the times the IP Phones download the firmware.
Nortel has tested the following TFTP Servers. They are listed in order of
preference:
• Nortel TFTP Server (ONMS application)
• 3COM TFTP Server
• Pumpkin TFTP Server
Ensure the following requirements are met before downloading firmware:
• A LAN must be properly configured and operational.
December 2006