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TABLE 3
S REGISTERS
Register
Function
Default
Range
SO
Sets the automatic
answer feature and the
number of rings required
for the modem to answer
a call
0 rings
0 to 255
SI
Contains the count of the
number of rings before a
call is answered or dis¬
connected.
0 rings
0 to 255
S2
Determines the escape
command character
43 (ASCII
value for
+ sign)
0 to 127
S3
Determines which key
or character ends a
command line
13 (ASCII
value for
[Return])
0 to 127
S4
Determines whether the
cursor moves to the next
line after a message
10 (ASCII
value for
line feed)
0 to 127
S5
Determines which key
or character moves the
cursor back one space
to erase the preceding
character.
8 (ASCII
value for
[Back¬
space])
0 to 32, 127
S6
Determines how long the
modem waits for the dial
tone before dialing.
2 seconds
2 to 255
S7
Determines how long the
modem waits for a carrier
signal before hanging up.
30 seconds
1 to 255
S8
Determines the length of
the comma command (,)
which causes the modem
to wait for a second dial
tone when dialing through
a switchboard.
2 seconds
0 to 255
S9
Reserved register.
SIO
Reserved register.
S11
Reserved register.
27
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