Digi TransPort WR11 - S Register Definitions

Using the command-line interface AT commands
Digi TransPort® Routers User Guide
174
S register definitions
In addition to the AT commands there are a number of Special (“S”) registers. These registers contain
numeric values that may represent time intervals, ASCII characters or operational flags.
To display the contents of a particular “S” register, use the ats command in the form atsn? where n is
the number of the register for which contents are shown.
To store a new value into a register, use the S command in the form atsn=x where n is the number of
the register to be changed and x is the new value. For example, ats31=4 stores the value 4 in S31.
The router maintains one set of registers for each ASY port. By default, the S command operates ONLY
on the S register set for the active port. To select an alternative default port, use the at\port
command first.
Each register can only be set to a limited range of values as shown in the table below:
Register Description Units Default Range
S0 V.120 Answer enable Rings 0 0-255
S1 Ring count Rings n/a n/a
S2 Escape character ASCII 43 0-255
S9 DCD on delay ms x 20 0 0-255
S10 Pulse time for DCD Low ms x 10 0 0-255
S12 Escape delay ms 50 0-255
S15 Data forwarding timer ms 2 0-255
S16 RS422/485 serial port settings N/A 0 0, 2, 3
S23 Parity N/A 0 0-2 5 6
S31 ASY interface speed refer to full description n/a 0-11
S33 DTR dialing N/A 0 0 1
S45 DTR loss de-bounce 0.05 seconds (0.25s) 1-255
S0: V.120 answer enabled
Units: Rings
Default: 0
Range: 0-255
Used in V.120 mode only. Enables or disables 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 router 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.