User guide

If the line is in use and the modem receives an ATDT command to dial out, the modem will

not go off hook and will display the “LINE-IN-USE” result code. If the modem is off hook and

the extension is picked up, the modem will drop the connection and display the “OFF-HOOK

INTRUSION” result code.

AT S registers

The S registers use the following format: ATSr=n<CR> where the “r” is the S register number

and “n” is the parameter to set it to. To read the current contents of an S register, issue an

ATSr?<CR> command where “r” is the register in question. The modem will then display the

value of the S register.

S0 0-255 Rings 0

Ring to answer on. ATS0=1<CR> means

answer call on first ring detected.

S1 0-255 Rings 0 Number of rings counted.

S2 0-127 ASCII 43 Escape code character.

S3 0-127 ASCII 13 Command terminator<CR>.

S4 0-127 ASCII 10 Line feed character.

S5 0-127 ASCII 8 Backspace character.

S6 2-255 Seconds 2 Wait time for dial-tone detection.

S7 1-255 Seconds 50 Wait time for carrier.

S8 0-255 Seconds 2 Pause time for coma in dial string.

S10 1-255 .1sec 14 Loss of carrier to hang up delay.

S11 50-255 .01sec 85 DTMF tone duration.

S12 0-127 1/50 sec 50 Escape code guard time.

S24 0-255 1sec 0 Sleep mode inactivity timer.

S29 0-255 10mS 70 Hook flash dial modifier time.

S30 0-255 10Sec 0 Inactivity disconnect timer.

S95 0 Result code control.

Table E.5: AT S Registers

Appendices 86