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SM336 Manual
17
0 = Disabled (Default.)
1 = Enabled (&T8)
Bit 7 Not used
S18 - Test Timer
S18 sets the length of time, in seconds, that the modem conducts a test (commanded by &Tn) before returning to the
command mode. If this register value is zero, the test will not automatically terminate; the test must be terminated from the
command mode by issuing an &T0 or H command. When S18 is non-zero, the modem returns the OK message upon test
termination.
Range: 0-255 seconds
Default: 0
S19 - AutoSync Bit Mapped Options
S19 is supported for backwards compatibility only. No value can be written. Responds with default value.
Range: None
Default: 0
S20 - AutoSync HDLC Address or BSC Sync Character
S20 is supported for backwards compatibility only. No value can be written. Responds with default value.
Range: None
Default: 0
.
S21 - V.24/General Bit Mapped Options Status
S21 indicates the status of command options.
Default: 52 (34h) (00110100b)
Bit 0 Reserved (0)
Bit 1 Reserved (0)
Bit 2 CTS behavior (&Rn)
0 = CTS tracks RTS (&R0)
1 = CTS always on (&R1) (Default.)
Bits 3-4 DTR behavior (&Dn)
0 = &D0 selected
1 = &D1 selected
2 = &D2 selected (Default.)
3 = &D3 selected
Bit 5 RLSD (DCD) behavior (&Cn)
0 = &C0 selected
1 = &C1 selected (Default.)
Bit 6 DSR behavior (&Sn)
0 = &S0 selected (Default.)
1 = &S1 selected
Bit 7 Long space disconnect (Yn)
0 = Y0 (Default.)
1
=
Y1
S22 - Speaker/Results Bit Mapped Options Status
S22 indicates the status of command options.
Default: 117 (75h) (01110101b)