KE LOGEM 928, Operation Manual

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Operation Manual V.34- Modems, Version 07/97
ON
Chapter 2
Switches Description
Attention:
If you have selected the operation mode leased line M1+ the command
phase is deactivated automatically (ref. to AT command AT&B) as well as
the escape character “+“. The interface line M2/CTS is not active during
the offline phase. Further internal configurations suppress the character
echo and the modem reports. Any characters coming from the terminal
equipment are ingnored during offline phase.
Loading of a basic setting during software mode
A basic setting has to be preset before activation of the operation voltage
of the mode using the switches S2.6 ... S2.10 or S3.2 ...S3.6. This selected
preset is stored if you press the Da/Te button and activate the operating
voltage. The setting is stored in the RAM if you press the button until the
LED A/O, ANS or LB ligths up. If you press the button until the LED blinks
the setting is stored in the EEPROM as well. This guarantees that the
setting stays intact even after a voltage breakdown and reactivation of
the operating voltage.
This procedure is only applicable for the basic settings 0 ... 8. The settings
for compatible mode are activated directly after POWER ON.
Generation of an user setting
The modems allow for generating a user specific basic setting which is
normally a modification of one of the basic settings 0 ... 7 for a special
application. If such an alteration is only stored with the command AT&W
it might be overwritten in some cases.
Using the command AT&W2 allows for saving of generated user settings
as a basic setting. For safety reasons the user is requested for his
acknowledgement. Then the configuration is stored in a protected part of
the EEPROM. Now you can recall this set of parameters with the switches
S2.6 ... S2.10 or S3.2 ... S3.6 as basic setting 8. A modem that is set up
in such a manner may be applied anywhere without any other peripheral
devices as the user configuration can be loaded just by pressing the Da/
Te button during startup.
Basic settings of the modems:
Basic setting 0*
V.34, V.42bis operation, btx operation with
transmission rates > 2400 bit/s possible, AT
commands, autobaud, asynchronous
Basic setting 1 V.22bis btx operation, AT commands,
2400 bit/s asynchronous
Basic setting 2...7 ...
Basic setting 8 The user setting stored with AT&W2. This setting
corresponds to the basic setting 0 in delivery state,
but remote configuration is still possible.
* delivery state