S0 V.120 Answer Enabled; S1 Ring Count; S2 Escape Character; S12 Escape Delay - Digi TransPort User Manual

S33 DTR dialling
S45 DTR loss de-bounce

S0 V.120 Answer Enabled

Units: Rings
Default: 0
Range: 0-255
S0 is used only in V.120 mode to enable or disable automatic answering of incoming ISDN calls.
Auto answering is disabled when S0 is set to the default value of 0. Setting S0 to a non-zero value
enables auto-answering.
The actual value stored determines the number of "rings" that the unit will wait before answering.
For example, the command ATS0=2 enables auto-answering after two incoming rings have been
detected.
With each ring the RING result code is issued and the value stored in S1 is incremented. When the
value in S1 equals the value in S0 the call is answered.

S1 Ring count

Units: Rings
Default: n/a
Range: n/a
When ADAPT detects an incoming ISDN call on an ASY port, it will print "RING" to the ASY port at 2
second intervals. It also increments the S1 register, counting how many times "RING" is printed.

S2 Escape Character

Units: ASCII
Default: 43
Range: 0-255
The value stored in S2 defines which ASCII character is used as the Escape character, which by
default is the "+" symbol. Entering this character three times followed by a delay of 1-2 seconds
and then an AT command will cause the unit to switch from on-line mode to command mode.

S12 Escape Delay

Units: ms
Default: 50
Range: 0-255
The value stored in S12 defines the delay between sending the escape sequence and entering an
AT command for the unit to switch from on-line mode to command mode.
Digi TransPort User Guide
N/A
0.05 seconds
S0 V.120 Answer Enabled
0 0 1
(0.25s) 1-255
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