AudioCodes Mediant 4000 SBC User Manual page 671

User's Manual
If the file on the provisioning server was unchanged (not modified) since the date
and time specified in the header, the server replies with an HTTP 304 response
and the file is not downloaded. If the file was modified, the provisioning server
sends an HTTP 200 OK response with the file in the body of the HTTP response.
The device downloads the file and compares the version of the file with the
currently installed version on its flash memory. If the downloaded file is of a later
version, the device installs it after the device resets (which is only done after the
device completes all file downloads); otherwise, the device does not reset and
does not install the file.
To enable the automatic software (.cmp) file download method based on this
timestamp method, use the ini file parameter, AutoCmpFileUrl or CLI command,
configure system > automatic-update > auto-firmware <URL>. The device uses
the same configured URL to download the .cmp file for each subsequent
Automatic Update process.
You can also enable the device to run a CRC on the downloaded configuration
file (ini) to determine whether the file has changed in comparison to the
previously downloaded file. Depending on the CRC result, the device can install
or discard the downloaded file. For more information, see ''Cyclic Redundancy
Check on Downloaded Configuration Files'' on page 673.
Note:
•
When this method is used, there is typically no need for the provisioning server to
check the device's current firmware version using the HTTP-User-Agent header.
•
The Automatic Update feature assumes that the Web server conforms to the
HTTP standard. If the Web server ignores the If-Modified-Since header or doesn't
provide the current date and time during the HTTP 200 OK response, the device
may reset itself repeatedly. To overcome this problem, modify the update
frequency, using the ini file parameter AutoUpdateFrequency or CLI command
configure system > automatic update > update-frequency.
•
One-time File Download: This is applicable to software (.cmp) and Auxiliary
(e.g., License Key, CPT and Dial Plan) files. The device downloads these files
only once, regardless of how many times the device may repeat the Automatic
Update process. Once they are downloaded, the device discards their configured
URLs. To update these files again, you need to configure their URL addresses
and filenames again. Below is an example of how to configure URLs for some of
these files:
Auxiliary Files:
♦
♦
Software (.cmp) File:
♦
Version 7.2
ini:
CptFileURL =
'https://www.company.com/call_progress.dat'
FeatureKeyURL =
'https://www.company.com/License_Key.txt'
CLI:
(config-system)# automatic-update
(automatic-update)# call-progress-tones
http://www.company.com/call_progress.dat
(automatic-update)# tls-root-cert https://company.com/root.pem
ini:
CmpFileUrl =
'https://www.company.com/device/v.7.20A.000.038.cmp'
671
41. Automatic Provisioning
Mediant 4000 SBC