Specifications

AN93
Rev. 0.8 61
10 Carrier loss timer—The time a remote modem carrier
must be lost before the Si2493/57/34/15/04 discon-
nects. Setting this timer to 255 disables the timer, and
the modem does not time out and disconnect. If S10 is
less than S9, even a momentary loss of carrier causes
a disconnect. Use for V.22bis and lower data rates.
14 1–255 0.1 second
12 Escape code guard timer—Minimum guard time
before and after “+++” to recognize a valid escape
sequence.
50 10–255 0.02 second
14 Wait for dial tone delay timer. This timer starts when
the “W” command is executed in the dial string.
12 0–255 seconds
24 Sleep Inactivity Time—This is the time the modem
operates in normal power mode with no activity on the
serial port, parallel port, or telephone line before enter-
ing the low-power sleep mode and waking on ring. The
modem remains in the normal power mode, regardless
of activity, if the timer is set to 0.
0 0–255 seconds
30 Disconnect Activity Timer—Sets the length of time that
the modem stays online before disconnecting with no
activity on the serial port, parallel port, or telephone
line (ring, hookswitch flash, or caller ID). This feature is
disabled if set to 0.
0 0–255 minutes
38 Hang Up Delay Time—Maximum delay between
receipt of ATH0 command and hang up. If time out
occurs before all data can be sent, the NO CARRIER
(3) result code is sent. OK response sent if all data
transmitted prior to time out. This register applies to
V.42 mode only. S38=255 disables time out, and the
modem only disconnects if data is successfully sent or
carrier is lost.
20 0–255 seconds
40 Data Pattern - Data pattern generated during &T4 and
&T5 transmit tests.
0 – All spaces (0s)
1 – All marks (1s)
2 – Random data
00–2—
Table 32. S-Register Descriptions (Continued)
Definition
S-Register
(Decimal)
Function Default
(Decimal)
Range Units