User manual
IEC61131 User and Reference Manual 
April 22, 2008     
612 
String 
Command 
Description 
Default 
S0 register 
Rings to answer 
1 
S2 register 
CTS-on delay 
measured in units of 8.3 ms. 
14 
(116 ms) 
S3 register 
Anti-streaming timer 
measured in 10‟s of seconds. 
0 
(disabled) 
S4 register 
CTS-off delay  
measured in units of 8.3 ms. 
4 
(33 ms) 
S6 register 
Dial tone wait time 
measured in 10ths of a second. 
30 
(3 seconds) 
S7 register 
Carrier wait time 
measured in seconds. 
15 
(15 seconds) 
S9 register 
Carrier detect delay time 
measured in units of 8.3 ms. 
10 
(83 ms) 
S10 register 
Carrier loss time 
measured in units of 8.3 ms. 
10 
(83 ms) 
S11 register 
Tone dial speed  
measured in 0.050 seconds. 
2 
(5 p/p second) 
US Robotics Sportster 28,800 
String 
&F1 &A0 &H0 &K0 &M0 &R1 &B1 S0=1 
Command 
Description 
&F1 
generic factory configuration 
&A0 
ARQ result codes disabled 
&K0 
data compression disabled 
&M0 
error control (ARQ) disabled 
&B1 
fixed serial port rate 
&H0 
Flow control disabled 
&R1 
Modem ignores RTS 
S0=1 
answer phone on first ring (optional) 










