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Appendix 2: AT Command Set
Perle 833IS User Guide 261
S-Registers
The S-Registers are summarized in along with their default values. Registers or
register fields quoted as “reserved” are reserved for current or future use by the
Firmware, or are permanently overridden by PTT limitations.
5HJLVWHU6XPPDU\
Register Function Range Units Saved Default**
S3 Carriage Return Character 0-127 ASCII 13
S4 Line Feed Character 0-127 ASCII 10
S5 Backspace Character 0-255 ASCII 8
S6 Wait Time for Dial Tone 2-255 s * 2
S7 Wait Time for Carrier 1-255 s * 50
S8 Pause Time for Dial Delay
Modifier
0-255 s * 2
S9 Carrier Detect Response Time 1-255 0.1 s * 6
S10 Carrier Loss Disconnect Time 1-255 0.1 s * 14
S11 DTMF Tone Duration 50-255 0.001 s * 95
S12 Reserved
S13 Reserved
S14 Reserved
S15 Reserved
S16 Reserved
S17 Reserved
S18 Reserved
S19 Reserved
S20 Reserved
S21 Reserved
S22 Reserved