Avaya Media Gateway G350, Руководство по обслуживанию

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Avaya Communication Manager controlled maintenance
DIG-LINE (Digital Line)
Maintenance of the Avaya G350 Media Gateway 119
June 2004
Nonvolatile Memory
Nonvolatile memory stores downloadable parameters in programmable terminals. Once the terminal is
downloaded, it is not be necessary to download it again, even if power is removed from the terminal. If
nonvolatile memory fails with power still present, the terminal reverts to its default factory settings
except for its A-law/mu-law companding settings which are stored in RAM. If power is removed after the
nonvolatile memory fails, the terminal reverts to its factory default settings.
NOTE:
The mu-law companding mode is assigned as a default setting at the factory. For the
United States, a programmable terminal can place calls even though it has not been
downloaded from the system.
Download Actions
There are several different scenarios that cause a terminal to be downloaded. These can occur as part of
background maintenance activity or on demand from the System Access Terminal or from a station.
For the background actions described below, the terminal downloads automatically if a download retry
flag for the terminal is set in software. This flag is set at the time translation is loaded at boot time, when
translation which affects the parameters of a terminal is changed as part of system administration actions,
and when a port is inserted in software as a result of board insertion or translation change.
Automatic Download Actions
System Reboot/Restart
A global download action is started when periodic maintenance tests start after a system reboot/restart
regardless of whether the parameters have been downloaded previously.
Periodic Tests
If the download flag is still set when periodic tests are run on a terminal, a download action will occur.
This operation is required in case a terminal could not be downloaded previously because it was off-hook
at the time the system first booted or because the terminal was off-hook at the time translation associated
with downloadable parameters was changed.
Note that it may take more than an hour for periodic tests to reach the terminal that needs to be
downloaded.
Terminal Administration
A downloadable terminal is automatically downloaded when translation changes associated with
downloadable parameters are made as part of system administration. As shown in the previous
Table 62,
Parameters Downloadable to Programmable Terminals, on page 118, these changes can be for a specified
terminal or may be system-wide. If the change is for system-level parameter, a background global update
request is made to download all programmable terminals.