56K Softmodem
Command Reference
- 89
S20—Sync Mode Underrun Fill Character
Specifies the character that will be sent in sync mode when there is not enough
valid data available.
Range: 0 to 255.
Default: 0.
S21—V.24/General Bit-Mapped Options Status
S21 indicates the status of command options. Only bits 3, 4, and 5 are used; they
are read-only.
•
Default: 48 (30h) (00110000b).
Table 5-4: Register S21 Bits
S29—Flash Dial Modifier Duration
Set the duration of the hook flash (!).
Range: 0—255.
Default: 50.
Base Unit: 10 milliseconds.
S30—Inactivity Timer
This register specifies the length of time in minutes that the modem will wait
before disconnecting when no data is sent or received. This function is only
applicable to buffer mode.
Range: 0—255.
Default: 0 (disabled).
Bit Description
Value
0 Set
by
&J<value>
command but other-
wise ignored.
0 =
J0
(default). 1 =
J1
.
1
Sync mode underrun action.
0 = Send underrun fill character (20) (default). 1
= Repeat last valid character.
3—4 DTR
behavior
(
&D<dial string>
). 0
=
&D0
selected. 1 =
&D1
selected. 2 =
&D2
selected (default). 3 =
&D3
selected.
5
DCD behavior (
&C<value>
). 0
=
&C0
selected. 1 =
&C1
selected (default).
6
DSR behavior (
&S<value>
). 0
=
&S0
selected (default). 1 =
&S1
selected.
7
Long space disconnect (
Y<value>
). 0
=
Y0
(default). 1 =
Y1
.
