Z02215
Single Chip Modem with Integrated Controller, Data Pump, and AFE
38
Table 7. Modem S-Registers (Continued)
Register Range
S6 2–255
Default Units
Description
2
Seconds 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.
The W dial modifier in the DIAL command applies only to
detection of dial tone at a later time and is independent of S6.
S7
1–255
30
Seconds 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.
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.
S8
S9
0–255
1–255
2
6
Seconds 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.
1/10th
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
second
PS001907-0904
Modem S-Registers
ZILOG [ ZILOG, INC. ]
