Tftp Server Planning - Nortel 1110 Installation And Operation Manual

Page 606 of 630

TFTP Server planning

553-3001-368 Standard 26.00
Appendix H: TFTP Server
CAUTION
TFTP firmware download does not work when the
IP Audio Conference Phone 2033 is behind a NAT Server.
The TFTP Server holds the firmware for updating the IP Phones. Assuming
the IP address for the TFTP Server has been configured on the IP Phone, each
time the IP Phone is powered on, rebooted, or is manually reset, the IP Phone
checks the version of firmware against the version of firmware on the TFTP
Server. If the versions are different, the IP Phone downloads the new
firmware from the TFTP Server.
The following information must be considered when planning for a TFTP
Server:
• The process for the IP Phone to check the version of firmware against the
firmware on the TFTP Server takes a few seconds for a quiet network.
• 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.
August 2007