Insys Modem 56k 4.1 11-02-01-01-40.028 Manuale Utente

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AT Command Set 
INSYS Modem 336/56k 4.1 (UL) 
 
AT Command Set 
Most of the INSYS communication devices are controlled internally via AT com-
mands. A terminal program is integrated in the HSComm. The AT commands can 
be directly entered at the menu item “Terminal”. 
 
Alternatively, we recommend the terminal program TeraTerm by T. T. Teranishi. 
The free software can be downloaded at 
http://www.vector.co.jp/authors/VA002416/teraterm.html. 
Each AT command starts with the letters AT and ends with a “Carriage Return” 
(CR). Capital and small letters will both be accepted, but the leading characters 
must be either ‘AT’ or ‘at’. The command line is evaluated after the modem re-
ceives a Return command. In the description, a parameter with the letter “n” 
means that it can have various values. 
For example, ATL<n>, where 'n' can have the value 0 or 3, e.g. ATL2 (medium vol-
ume). For commands which expect a parameter but don't have a parameter, the 
modem will automatically assume the parameter 0. The commands ATZ and AT0
for example, will have the same effect. 
The factory settings are marked “(default)”. 
The standard end character is “return” (oDh) or “<CR>“. “Return” may not be 
entered after “****” or “+++”. 
 
The commands are acknowledged with “OK” or “ERROR”.  A com-
mand that is being edited will be interrupted by any further incoming 
character. Therefore, the next command must wait for acknowl-
edgement to avoid the deletion of the current command.
 
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July 06