RC224ATL/224ATLV
5.0 S Registers
EmbeddedModem Family
Table 5-2. S Register Description (3 of 8)
Register
Default
Range
Units
Description
Modem Test Option. Controls the diagnostic modes as follows:
—
S16
00
None
Bit 0
Local Analog Loopback L3 (See &T1 command)
0
1
Disabled (factory default)
&T1—Enabled
Bit 1
Bit 2
Reserved
Local Digital Loopback (See &T3 command)
0
1
Disabled (factory default)
&T3—Enabled
Bit 3
Remote Digital Loopback L2 (See &T6 command)
0
1
Disabled (factory default)
&T6—Enabled
S17
S18
00
00
0-250
0-255
4 ms
Fax Mode Null Byte Timer. The value of S17 determines the
Increments length of time null bytes are sent by the modem if the last byte
sent during DTE underrun in Fax Mode is not a null byte.
0 ≤ S17 ≤ 250 corresponds to a timer value of 0–1 second (i.e.,
the timer value is the value of S17 times 4 ms).
Seconds Test Timer. Sets the length of time the modem conducts a test
before returning to the command mode. If this register is zero, the
test will not automatically terminate; the test must be terminated
from the command mode by issuing an AT&T0 or ATH command.
—
0
—
—
S19
S20
Not Supported
1-127
Seconds Fax Mode Inactivity Timer. S20 can be used to cause the modem
to automatically place the telephone on-hook or reset itself if
inactivity (of variable duration) is detected while in Fax Mode.
D224ATLVDSC
Conexant
5-5
CONEXANT [ CONEXANT SYSTEMS, INC ]
