Ip Telephones Not Supported By The Tftp Server Feature; Administering The Upgrade - Avaya G250 Installing And Upgrading

Upgrading IP phone configuration and firmware files

IP telephones not supported by the TFTP Server feature

4630
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4630SW
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Administering the upgrade

When using supported IP phones with the G250, the IP phones require the downloading of the
settings file and the upgrade scripts. These files are stored in the script banks in NVRAM and
are preserved in the event of a reset or power failure. There are two script banks.
In addition, each phone can have a booter and a phone application. There are four banks that
can store up to two phone images (booter and phone application files) at any given time. Since
the image files are stored in RAM, a reset or power failure erases these files. The image files
are used only for upgrading the IP phone, so there is no need to store them permanently.
However, the scripts are used by the IP phones when they are reset, and are therefore stored in
NVRAM. You can upgrade up to two types of phones and then release the banks for use with
another IP phone type.
There are cases where the image files are the same for different IP phone types. In these
cases, you can download the image files once for the IP phones that use the same image. The
scripts are global to all the supported IP phone images.
You can download and then upload setting script files in order to update their content. It is not
recommended to change the upgrade script.
There are four image banks, supporting two complete IP phone images in RAM, provided the
combined file sizes do not exceed the RAM allocation for TFTP server. The maximum size for a
booter application or phone application file is 4.5 MB.
By default, the RAM allocation for TFTP server is 11.2 MB. You cannot increase the RAM
allocation for TFTP server. You can, however, increase the allocation to the Sniffer cache
application, by up to 10 MB, at the expense of TFTP allocation. The maximum RAM for both
applications is 12 MB. There is usually no necessity to increase the RAM allocation for the
Sniffer cache application, but, since configuring memory allocation is supported, it is advisable
to check memory size before performing an upgrade.
!
CAUTION:
To activate a change in RAM allocation to the TFTP server, reset is required.
CAUTION:
Upon reset, any phone image files stored in RAM are erased.
Note:
Previous releases of TFTP server required the configuration of the DHCP server
Note:
option 43/176 with the named value pair TFTPDIR=/phonedir/ in order to allow
the IP phone to access the files in this directory. This configuration is still
supported but is no longer required.
82 Installing and Upgrading the Avaya G250 Media Gateway