DM16E1 / DM4E1 Operation and Installation Manual - 204-4001-19 26
3.10. Settings Menu
This menu is used to grant access to equipment settings (options 1, 2, and 3) and to the management of
user settings (options 4 to 9).
Submenus of the Settings menu:
• General Settings: Parameters that affect the equipment as a whole. Allows changes to the
topology, scrambler, external clock settings, backup settings and enabling of external alarm.
• Port Settings: Individual parameters for modular interfaces (aggregate or bridge) or for interfaces
mounted in the equipment.
• Aggregate Map Settings: This table indicates where each of the enabled tributaries will be
directed to
# -------------------------------------------------------------------------
# DataCom Telematica – DM16E1 Multiplexer
# /local/settings
# -------------------------------------------------------------------------
# Settings Menu
#
# 1 - General Settings
# 2 - Port Settings
# 3 - Aggregate Map Settings
#
# 4 - Check user settings
# 5 - Update changes (user memory to equipment)
# 6 - Recall equipment configuration (equipment to user memory)
# 7 - Save equipment configuration to E2PROM
# 8 - Recall E2PROM settings to user memory
# 9 - Recall Factory values to user memory
#
# User memory status :[ E2PROM Config. ]
#
# Option: [ ]
# -------------------------------------------------------------------------
# <ENTER> Refresh <ESC> Exit
# -------------------------------------------------------------------------
Equipment configurations are stored in non-volatile memory (E2PROM). This feature guarantees that
settings will not be lost in case of a power failure or system reset (as during software upgrade).
The following steps are necessary to change E2PROM settings:
a) Load current settings from memory.
b) Change settings.
c) Test the new settings without applying them (optional).
d) Apply the new settings on the equipment (volatile memory).
e) Save the settings in non-volatile memory (E2PROM).
These steps are necessary because many settings are dependent on each other. For example, in DM16E1
devices, the V.35 tributary interface uses the same physical space within the E3 frame as tributary E1
number 16. Therefore, in a DM16E1 device with an active tributary 16, a command to activate the V.35
tributary interface could be considered inconsistent.
The mechanics described above allow for temporary inconsistencies (step b), as in the example of
simultaneous activation of tributary 16 and tributary V.35. Inconsistencies are corrected in a draft copy of
the equipment memory (user memory). Optionally, the equipment may validate the new configuration (step
c). This checking step has the purpose of being a guide in the configuration validation. Another advantage
is that the equipment may continue to operate normally during the reconfiguration process.
Next, the configuration should be validated. By security, the equipment uses a volatile memory (equipment
memory) as base for the equipment using. Thus, coherent configurations can be tested as for
functionalities with the possibility of an easier return to a functional configuration hosted on a non-volatile-
memory (E2prom settings). Once the configurations are validated, the equipment modifies its operation
mode and data loss may occur.
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