hangup; if S1=255, the modem will not
hang up when the carrier is lost;
dropping DTR hangs up the modem
(1/10 second)
S11
Duration of the touchtone dialing tone
spacing
50-255
70 ms
S12
Guard time for the escape code (1/50
second)
0-255
50
S13
Bitmapped register. Selects the bit(s)
you want on and sets S13 to the total of
the values in the Value column. For
example, ATS13.0=17 enables bit 0
(value 1) and bit 4 (value 16)
0-255
0
1 = Reset on DTR loss
2 = Reduced non-ARQ transmit buffer
4 = Set DEL=backspace
8 = Do DS0 on DTR
16 = Do DS0 on Reset
128 = Escape code hangup
S15
Bitmapped register.
0-255
0
1 = MNP/V.42 disabled in V.22
2 = MNP/V.42 disabled in V.22bis
4 = MNP/V.42 disabled V.32, V.34
8 = Disable MNP handshake
16 = Disable MNP level 4
32 = Disable MNP level 3
64 = Unusual MNP incompatibility
128 = Disable V.42
136 = Disable V.42 detection phase
S16
Bitmapped test register. 2 = Dial test
2
0
S18
Test timer for AT command &T; when
AT&T=0 the timer is disabled.
0-255
0 sec
S19
Duration for inactivity timer; S19=0
disables the timer
0-255
0
S21
Sets error correction break length (1/100
second)
0-255
10
S22
Designates the ASCII character code
for XON
0-127
ASCII 17
S23
Designates the ASCII character code
for XOFF
0-127
ASCII 19
