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DIG-LINE (Digital Line)
Issue 5 October 2002
1025
555-233-119
Downloadable Terminal Parameters
The following parameters are downloaded to programmable terminals:
Nonvolatile Memory
Nonvolatile memory is used to store downloadable parameters in programmable
terminals. Therefore, once the terminal has been downloaded, it is not be
necessary to download it again, even if power is removed from the terminal.
If the 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.
Mu-law companding is assigned as a default setting at the factory, so for domestic
use, a programmable terminal can place calls, even though it has not been
downloaded from the PBX.
Download Actions
There are several different scenarios that cause a terminal to be downloaded. As
described below, 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 will be downloaded
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.
Table 199. Downloadable Parameters
Parameter Scope Terminal
International Flags (A-law/Mu-law,
Display Mode, DLI Voltage level) System level 84xx, 603x, 302B1
Primary Levels
(Transmission & Sidetone) System level 84xx, 603x, 302B1
Adjunct Levels
(Transmission & Sidetone) System level 84xx
Handset Expander Option System level 84xx
Administrable Options (Speakerphone &
Mute Button) Per-terminal 84xx
Administrable Softkeys Per-terminal,
System level 8410D, 8434D