AASTRA SIP-DECT (Release 2.1)- OM System Manual - Installation, Administration and Maintenance EN - Manual (Page 159)

SIP – DECT OM System Manual Release 2.1 7 Configuration und Administration Aspects
depl-1230/1.3 Page: 159 (196)
7.15.1 How “Download Over Air” Works
If the “Download over Air” feature is activated, the OMM acts as a download server which
provides the firmware for downloads.
The PP sends its actual firmware version within the DECT attachment procedure. If the
firmware version does not match the version provided by the OMM, the PP will be queued
into the update-queue. Later on the queued PPs will be paged to establish a download
connection. After the connection is established, the OMM sends its actual PP firmware
version and the PP will request a handset description file. After receiving the handset
description file, the PP decides which files are missing or need to be updated. If files are
missing or need to be updated the PP initiates the download procedure.
The OMM takes care of the following download scenarios automatically:
• If a handsets becomes unreachable e.g. when the handset is switched off, the OMM will
update the handset when the PP becomes available again.
• The OMM will take care of the software download while the user is moving between base
stations (roaming) and location areas.
• The OMM has the capability of resuming a download from the point where it was last
disrupted. e.g. the user goes out of coverage area during download or the handset runs
out of battery power.
• The OMM updates new handsets subscribed to the system.
• While the handset is barred (e.g. low battery or “Download over Air“ is disabled at the
local menu), the download will be postponed.
The download happens without any user intervention. During the download, the telephony
services, the roaming- and handover procedures are still available. The download stops
automatically when e. g. the PP leaves the coverage area or the RFP gets busy. The
download resumes automatically when the stop cause is solved.
The Aastra 610d / 620d / 630d handsets have two partitions in the internal flash memory to
hold 2 different software versions. During the download the new firmware is written to one
partition and the PP is running from the other partition.
After the download is successfully completed, the new firmware will be activated when the
handset is in the idle state.
The download of a single PP with a firmware of 1 MB lasts approximately 90 minutes. The
number of PPs which can be downloaded depends on the available system resources.
The “Download over Air” service is delayed after a system startup for a while to become the
whole DECT system active. This may last several minutes.
7.15.2 How to configure “Download Over Air”
In the following, the configuration of the “Download Over Air” feature is described by using
the OM Web service. The feature can also be configured using the OM Management Portal
(OMP). Therefore, links to the corresponding OMP settings are also given, but without
screenshots.
The “Download over Air” feature can be activated or deactivated on the System Settings ”
web page.