Operation in AT Mode
18
MicroLink ISDN/PCC-16
Manual © 1997 ELSA GmbH
4.1.1 Starting cFos
Requirements for
cFos
Before starting cFos, you must first load the required
CAPI driver
. To start
cFos in DOS, call the file STARTFOS.BAT from the cFos directory, or enter
cfos i <CR>
Entering STOPCFOS.BAT will stop cFos, as will the alternative
cfos d <CR>
In Windows, cFos is automatically started if the
WIN.INI
file was updated
during installation.
◊
NOTE
◊
To load these drivers automatically at startup, these drivers can be called from
the AUTOEXEC.BAT
cFos does not support the same AT command user interface as ATCAPI. Thus, some
AT commands familiar to ATCAPI users may not be recognized or executed. Please
refer to the cFos driver documentation. Further information to this subject is to be
found in the files CFOS.DOC, MODEM.DOC AND CFOS.FAQ.
The following options, or combinations thereof, are available:
Option
Meaning
i
d
-cn
none
Loading cFos driver
Unloading cFos driver
Load FOSSIL port n, e.g. COM3 is loaded with -c2
Display help
4.2 General
AT command set
The
AT command set
has established itself as the world-wide standard for
modem control command syntax (AT = command prefix
AT
tention).
Two operating states The two general operating states of the ISDN adapter board
in the AT mode
are the
command state
and the
online state
(transmission state).
Command input,
execution
After the drivers have been loaded, the ISDN adapter board is in the
command state
. Commands can be accepted, interpreted and executed in
this state only. After a successful connection with the other party, the ISDN
adapter board automatically changes to the online state.
Data transmission
Online state
signifies that a connection to another party exists. The ISDN
adapter board is "online", either with a successful connection (outgoing call)
or with the acceptance of an incoming call. In this state data exchange is
possible between the two connected stations.
