Z02215 Datasheet, PDF (44/74 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
38
Table 7. Modem S-Registers (Continued)
Register Range
S6
2–255
Default
2
Units
Seconds
Description
Delay to wait before performing a blind dial. S-register S6
is the modem's delay after going off-hook before blind dialing
(that is, dialing without waiting for a dial tone). The delay lets
the central telephone office detect the modem has gone off-
hook and put a dial tone on the line. This delay only applies to
the first dial tone. S-register S6 is used only if X0, X1 or X3
has been selected.
S7
1–255 30
Seconds
The W dial modifier in the DIAL command applies only to
detection of dial tone at a later time and is independent of S6.
Delay to wait for carrier after dialing. S-register S7 is the
maximum amount of time the modem waits for a dial tone (see
Table 4, “Dial Modifiers,” on page 34, W dial modifier), waiting
for silence (@ dial modifier), dialing or handshaking.
When answering, the modem may spend time handshaking
up to the amount specified in S7 (taking the telephone line off-
hook until entering DATA mode).
When calling, the modem may spend up to to the amount
specified in S7,(from taking the telephone line off-hook until
beginning handshaking). Then the modem may spend
additional time handshaking, up to the amount specified in S7,
with the other modem until entering DATA mode.
S8
0–255 2
S9
1–255 6
Seconds
1/10th
second
The modem hangs up and returns the NO DIALTONE, NO
ANSWER or NO CARRIER result codes if a length of time
longer than the amount specified in S7 is required for these
operations.
Delay to wait when a comma dial modifier is processed.
S-register S8 is the duration of the delay when the comma (,)
command or dial modifier is processed.
Time carrier must be present before being recognized. S-
register S9 is the number of tenths of a second a carrier signal
must be present before the modem recognizes it
PS001907-0904
Modem S-Registers