KE LOGEM 928, Operation Manual

Page: 105 / 200

105
Operation Manual V.34 - Modems, Version 07/97
REG
Chapter 4
Register Description
4 Register Allocation
4.1 Modem Memory Locations
The modems feature integrated data memories for data protection (e.g.
configurations, phone numbers, individual labelling etc.).
ROM Read Only Memory
The internal ROM of the modems is a read only memory containing the
basic settings 0 ... 7. These data is being kept even after deactivation of
the modems power supply and may not be altered. The basic setting “n“
can be saved to the RAM of the modem with the command AT&F(n).
EEPROM Electrically Eraseable Programmable ROM
The internal EEPROM is a read/write memory that saves all stored data
even after deactivation of the device. You can change the EEPROM
content.The EEPROM stores all short dial register contents (phone
numbers) directly. With the command AT&W(n) you can define register
contents (defaults) of your application in the EEPROM. Max. 3 settings
(user settings 0 and 1 and basic setting 8) may be stored in the EEPROM.
RAM Random Access Memory
The internal RAM is a read/write memory that contains any current data
(working storage). Any changes concerning modem configuration during
operation are stored here. The working storage is being erased after
deactivation of the device. Any new user defined settings have to be
stored in the EEPROM for this reason. Data protection is performed with
the command AT&W(n).