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Chapter 3
Configuring the Cisco MGCP IP Phone
The phone contacts the TFTP server and requests its configuration files. The phone compares the image
defined in the file to the image that it has stored in Flash memory. If the phone determines that the image
defined in the file differs from the image in Flash memory, it downloads the image defined in the
configuration file (which is stored in the root directory on the TFTP server). Once the new image has
been downloaded, the phone programs that image into Flash memory and then reboots.
Note
If you do not define the image_version parameter in the default configuration file, only phones that have
an updated phone-specific configuration file with the new image version and that have been restarted use
the latest firmware image. All other phones use the older version until their configuration files have been
updated with the new image version.
Upgrading from Release 2.1 or Earlier Releases to Release 4.0
Copy the P0M30202.bin image from Cisco.com to the root directory of the TFTP server.
Step 1
If you are dual booting from a Cisco IP phone running the Skinny Client Control Protocol (SCCP) or
Step 2
MGCP protocol, open the OS79XX.TXT file with a text editor and change the file to include P0M30202.
Open the phone configuration file with a text editor and edit the image_version variable to read
Step 3
P0M30202.
Reset each phone.
Step 4
The phone contacts the TFTP server and requests its configuration files. The phone compares the image
defined in the file to the image that it has stored in Flash memory. If the phone determines that the image
defined in the file differs from the image in Flash memory, it downloads the image defined in the
configuration file (which is stored in the root directory on the TFTP server). Once the new image has
been downloaded, the phone programs that image into Flash memory and then reboots.
Step 5
Copy the Release 4.0 image P0M3-xx-y-zz.bin, where xx is the release major version, y is the release
minor version, and zz is the maintenance number, from Cisco.com to the root directory of the TFTP
server.
Step 6
Using a text editor, open the configuration file and update the image version specified in the
image_version variable. The version name in image_version variable should match the version name
(without the .bin extension) of the latest firmware that you downloaded (for example, P0M3-xx-y-zz).
Reset each phone.
Step 7
Upgrading from Older Releases to the Current Release
Copy the P0M3-xx-y-zz image from Cisco.com to the root directory of the TFTP server.
Step 1
Using a text editor, open the configuration file and update the image version specified in the
Step 2
image_version variable. The version name in image_version variable should match the version name
(without the .bin extension) of the latest firmware that you downloaded.
Step 3
Open the phone configuration file with a text editor and edit the image_version variable to read
P0M3-xx-y-zz.
Cisco MGCP IP Phone Administrator Guide, Release 5.0 and Release 5.1
Upgrading the Cisco MGCP IP Phone Firmware
3-15
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