Owner`s manual
54-IWay Hopper
AT Commands/S-Registers
4.2 S-Registers
S-Registers are sections of memory in which values are stored that affect how the
MTA128ST operates. S-Registers are so-called because each has a name that
begins with the character S. Use the S 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?.
Table 4-2. 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-Protocol Detection
S53 Maximum Frame Size (X.75)










