Multi Tech Equipment ISIHI-2S User Manual

Page of 186
MultliModemISI Hybrid Series, ISIHI-2S
105
Chapter 5—TERMINAL ADAPTER AT Commands, S-Registers, Result Codes
T
erminal Adapter
Terminal Adapter S-Registers
S-Registers are sections of memory in which values are stored that affect how the TA
operates. S-Registers are so-called because each has a name that begins with the
character 
S
. Use the 
command to assign a value to or to read the current value of an
S-register. To assign a value to an S-register, use the command 
Sr=n
, in which 
r
 is the
register number, and 
n
 is the value you want to assign to the register, e.g., 
S7=45
.
 
To
read an S-register value, use the command 
Sr?
, in which 
r
 is the register number, e.g.,
ATS7?
.
S-Register Summary
S-Register
Function
S0
Rings until answer
S1
Ring count
S2
Escape character
S3
Carriage return character
S4
Line feed character
S5
Backspace character
S7
Wait for connection (abort timer)
S10
DCD Drop Time
S25
DTR Drop Time
S32
Escape sequence timeout
S50
Caller line ID (CLI)
S52
Auto-protocil detection
S53
Maximum frame size (X.75)
S0
 Number of Rings Until Answer
Unit: 1 ring
Range: 0–255
Default: 1
Sets the number of rings the TA waits for before it answers and begins its connect
sequence. 
S0=0
 turns off the ability to automatically answer a call. 
S0=1
 causes the TA
to automatically answer after 1 ring. Note that if the 
S0 
value is set too high, the calling
device may time out before the TA answers the call. For autoanswer, 
S0
 must have a
non-zero value, DTR must be high (
&D
 command), and the TA must be offline.
S1
 Ring Count
Unit: 1 ring
Range: 0–255
Default: 0
Counts the number of rings that have occurred, up to a maximum of 255. It is a read-only
register and is seldom, if ever, used in typical operation.
S2
Escape Character
Unit: Decimal ASCII code
Range: 0–127
Default: 43 (+)
Specifies the character used by the TA to escape from data mode and return to
command mode.