Manual Os Upgrade; Figure 15-7: Software Upgrade In Process, Os Upgrade Options Screen - Nortel Media Gateway 3500 Installation, Operation And Maintenance Manual

Figure 15-7: Software Upgrade in Process, OS Upgrade Options Screen

The Automatic OS Upgrade usually takes from 20 to 60 minutes, depending on the speed
of the connection between the SC board and the Installation Server. While Automatic OS
Upgrade is performed, there is no "progress" indication in the EMS. The only way to check
the current upgrade status is to connect via RS232 console to the SC board (if it is
available). If the Automatic Upgrade fails, the user discovers this only after a sanity timeout
(approx 1.5 hour).
If the Automatic OS upgrade fails, the process automatically falls back to the Manual OS
Upgrade mode. If this occurs, refer to the section below for details on a Manual OS
upgrade.
After the OS is successfully upgraded, the Software Upgrade Wizard installs the new
software version on secondary SC board, activates it and proceeds to the next step.
15.4.2.4

Manual OS Upgrade

The Manual OS Upgrade may be needed in one of the following cases:
Automatic Upgrade fails
Only one SC board exists in the chassis
If the Automatic Upgrade fails, we recommend attempting to repeat it manually. For this,
you must press the RESET button on the SC board you are trying to upgrade. The SC
board reboots and automatically repeats the attempt to upgrade the OS automatically.
In the event that this procedure does not succeed, perform the full manual OS upgrade as
described below.
In order to perform manual OS upgrade the following are required:
RS232 connection to the SC board
Installation, Operation, Maintenance Manual 176
Media Gateway 3500
Document # LTRT-90704