AT commands: Detailed description
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devolo MicroLink ISDN i
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50
EN
S174 ISDN/modem operation
Register S174 may be used to toggle between ISDN and modem operation.
The contents of register S174 can be stored with the commands AT&W or
AT*W. The individual bits in register S174 have the following significance:
S180 B-channel protocol settings
Register S180 is used to select the operating mode of the MicroLink ISDN i.
The individual bits in register S180 have the following significance:
Bit Dec. Description
0..1 0 0 Answer digital calls
1 1 Answer analog calls
2 2 Answer digital and analog calls
2..3 0 0 Outgoing digital call
4 1 Outgoing analog call
8 2 First digital, then analog call
4..7 0 0 Reserved
Bit Dec. Description
0..4 0 0 No protocol selected
1 1 X.75
2 2 T.70NL (X.75/T70)
3 3 V.120
4 4 HDLC
5 5 Transparent
6 6 HDLC-PPP
7 7 X.75, T.70NL and Cept/Kit
8 8 V.110
12 12 X.75 → HDLCP
13 13 X.75 → V.120 → HDLCP
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