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AN93
Rev. 1.3 89
10 Carrier loss timer—The time a remote modem carrier
must be lost before the ISOmodem disconnects. Set-
ting 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
UART, parallel port, SPI port, or telephone line before
entering 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 UART, parallel port, SPI port, or tele-
phone 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 the ATH0 command and hang up. If time out occurs
before all data can be sent, the NO CARRIER (3)
result code is sent. An OK response is sent if all data
are 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 are successfully sent
or carrier 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 45. S-Register Descriptions (Continued)
Definition
S Register
(Decimal)
Function Default
(Decimal)
Range Units