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DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Maintenance Object Repair Procedures
Page 10-427DIG-LINE (Digital Line)
10
a. TN754 (4-wire, Mu-law),
b. TN413 (4-wire, A-law)
c. TN754B (4-wire, A-law/Mu-law selectable)
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 will revert 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 will revert 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 will 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.
Table 10-138. 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