AL3A-RM User Guide Version B
Document Number: 451-93156-002B
135 of 172
Table 5: Standard S-Registers
Register
Number
Range
Default Description
Sr=n Command
Write-Protected
in SAC0201
S21
0 – 255 48
Bitmap register where bit 0 reflects
telephone jack control, bit 2 reflects
RTS/CTS on/off, bits 3 and 4 reflect the
&Dn setting, bit 5 reflects the &Cn setting,
bit 6 reflects DSR on/off, and bit 7 reflects
disconnecting long space.
Yes
S22
0 – 255 246
Bitmap register where bits 0 and 1 reflect
the speaker volume setting, bits 2 and 3
reflect the speaker on/off setting, and bits
4, 5 and 6 reflect the Xn setting.
Yes
S23
0 – 255 61
Bitmap register:
bit 0: autobaud setting
bits 1-3: DTE baud rate
bits 4-5: parity
bits 6-7: guard tone
Yes
S25
0 – 255 5
Sets length of time in hundredths of a
second that a change in the DTR status has
to persist for before it is recognized.
S27
0 – 255 9
Bitmap register where bits 0, 1 and 3
reflect the &Qn setting, bit 3 reflects
leased line operation setting, and bits 4
and 5 reflect synchronous clock setting.
Yes
S30
0 – 255 0
Disconnect activity timer. Timer used to
determine how long the call connection
has been inactive, in increments of
1/10000 ms. A value of 0 disables this
function.
S31
0 – 255 0
Bitmap register where bit 1 reflects line
modulation method setting, and bits 2 and
3 reflect the Wn setting.
Yes
