Z02215 Datasheet, PDF (45/74 Pages) Zilog, Inc. – Single Chip Modem with Integrated Controller, Data Pump, and Analog Front End

Z02215
Single Chip Modem with Integrated Controller, Data Pump, and AFE
39
Table 7. Modem S-Registers (Continued)
Register Range
S10
1–255
Default Units
14
1/10th
second
Description
Delay between lost carrier and hang up. S-register S10 is
the time between loss of the carrier signal from the other
modem and hang up by this modem. The carrier signal may
be lost for periods up to S10 minus S9 without causing the
modem to hang up. Setting S-register S10 to 255 causes the
modem to never hang up the telephone line because of loss of
carrier.
S11
50–255 95
S12
0–255 50
S13
Reserved
S14
Reserved
S15
Reserved
S16
Reserved
S17
6 to 43 10
S18
Reserved
S19
Reserved
S20
Reserved
S21
Reserved
S22
Reserved
S23
Reserved
S24
Reserved
The modem only recognizes a carrier signal after the time
specified in S-register S9. S-register S10 must always be
greater than S-register S9 so a carrier signal can be
recognized before the telephone line goes off-hook.
msecond DTMF tone duration. S-register S11 is the duration of a
DTMF tone. The country configuration may also specify that
S11 is the time between DTMF tones.
1/50th
second
Escape prompt delay time. Register S12 is the prompt delay
time for escape sequences from the ON-LINE state to the
COMMAND state.
Reserved Reserved
Reserved Reserved
Reserved Reserved
Reserved Reserved
–dBm
Sets transmit level. The actual transmit power used is
adjustable by the country configuration to accommodate
differences in transformers and other components in the
telephone line interface.
Reserved Reserved
Reserved Reserved
Reserved Reserved
Reserved Reserved
Reserved Reserved
Reserved Reserved
Reserved Reserved
PS001907-0904
Modem S-Registers