Medias Mediatrix 1204, Справочное руководство

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Chapter 13 - Software Download Download Procedure
182 Mediatrix 1204
8. If you have selected days in Step 6, set the time of the day when to initiate a software update in the
imageAutoUpdateTimeOfDay variable.
The time of the day is based on the sntpTimeZoneString variable setting (see “Chapter 20 - SNTP
Settings” on page 239 for more details).
You must have a time server SNTP that is accessible and properly configured, or the automatic
software update feature may not work properly. It is assumed that you know how to configure your
SNTP server. If not, refer to your SNTP server’s documentation. You can also refer to
“Chapter 20
- SNTP Settings” on page 239 for more details on how to configure the Mediatrix 1204 for a SNTP
server.
The software is downloaded at the first occurrence of this value and thereafter at the period defined
by the
imageAutoUpdatePeriod variable. Let’s say for instance the automatic software download is
set with the time of day at 14h00 and the update period at every 2 days.
• If the automatic download is enabled before 14h00, the first download will take place
the same day at 14h00, then the second download two days later at the same hour,
and so on.
• If the automatic download is enabled after 14h00, the first download will take place the
day after at 14h00, then the second download two days later at the same hour, and so
on.
Available values are -1, and from 0 to 23. Setting the variable to -1 means that the time of the day
at which the Mediatrix 1204 first initiates a software download is randomly selected.
9. Set the imageAutoUpdateEnable variable to enable .
If one of the telephones/faxes is off-hook, the Mediatrix 1204 will perform the download five minutes
after both ports are detected on-hook.
Spanning Tree Protocol (STP)
Many network switches use the Spanning Tree Protocol (STP) to manage Ethernet ports activity. When a
software download occurs, the
Ethernet connector of the Mediatrix 1204 may switch off. This shutdown may
trigger these network switches to shutdown the matching Ethernet port for at least one minute. This shutdown
on the switch side can prevent software download.
To prevent this, the Mediatrix 1204 supports the STP. However, this management has a potential time cost. It
may appear from time to time that software downloads take more time. This is normal.
The following is an example where the STP management impacts the download duration.
The software download procedure does not use any DHCP and DNS services.
The primary image server is down (or not properly configured).
The secondary image server is up and running well.
In this case, the Mediatrix 1204 tries to contact the primary image server. As it is not available, the Mediatrix
1204 retries for two minutes. It contacts the secondary server after that period and starts the software
download.
Note:
When using the Mediatrix 1204, Mediatrix recommends to disable the Spanning Tree Protocol on the
network to which the unit is connected. See also “DHCP Options Waiting Time” on page 128 .