KE LOGEM 928, Operation Manual

Page: 34 / 200

34
Operation Manual V.34- Modems, Version 07/97
ON
Chapter 2
Switches Description
The modems feature special settings for three different operation modes:
Compatible Mode
If you have selected one of the compatible mode settings the switches
S1.1 ... S2.4 correspond to the switches of the modem to be emulated.
If you have selected the modem type to be emulated the setting of all
other DIP switches can be kept. Then the modems operate as the modem
selected but they do support only duplex operation modes.
During compatible mode the button Da/Te must not be pressed during
POWER ON to select the operation mode.
Software Mode
During software mode (basic setting 0 ... 8) only the DIP switches S2.2 ...
S2.10 are active. All further configurations are software selected. You
can operate with two preset factory defaults and one basic setting that
may be altered. The preset factory settings are stored in the nonvolatile
and uneraseable ROM. The basic setting that may be defined freely can
be stored in a specially protected area of the EEPROM by the user. This
is a user defined basic setting that is stored with the command AT&W2.
After storing this configuration is to be regarded as a basic setting.
Mixed Mode
The modems are in software mode during this operation mode but some
register contents and AT commands have to be set using the DIP switches.
This allows for modem configuration without a terminal for asynchronous
or synchronous operation.
If you press the Da/Te button during POWER ON the basic setting is
loaded without interpreting the DIP switches. If you press the button until
the LED A/O, ANS or LB blinks the setting is copied to the EEPROM as
well. To make the configuration of the DIP switches active you must now
deactivate the modem and switch it ON again.
The mixed mode allows for operation with error correction and data
compression as well.
The commands and registers listed here can not be altered with an
command during mixed mode:
F(n), &L(n), &F(n), &M(n), \N(n), \Q(n), &D(n), %R(n), &H(n), SET(n)=x, S0,
S52, S60 and S80.
This procedure guarantees for DIP switches settings not to be altered by
AT commands.