參數(shù)資料
型號(hào)： Z0220516SSCR4259
廠商： ZILOG INC
元件分類： 調(diào)制器/解調(diào)器
英文描述： V2.22Bis Modem Controller(V2.22Bis調(diào)制解調(diào)器控制器)
中文描述： 1.2 kbps DATA, MODEM-SUPPORT CIRCUIT, PDSO28
封裝： SOIC-28
文件頁(yè)數(shù)： 19/30頁(yè)
文件大小： 226K
代理商： Z0220516SSCR4259
Z02205
ZiLOG
Modem Controller
PS001000-MOD0599
17
DIAL MODIFIERS
Dial modifiers perform special functions within a dial com-
mand.
Example:
ATDT9W1552368!@#71234;<CR>
The example instructs the modem to use tone dialing (T),
to access a number outside a PBX (9), to wait for dial tone
(W), to dial the number 1552368, to do a hook-flash (i.e.
timed break recall), to wait for quiet answer, and to issue
the PBX transfer code #7 before dialing extension number
1234, then to return to the Command state before initiating
the handshake.
Table 3. Dial Modifiers
Modifier
0–9 A B C D # *
Function
Dialing digits and characters. The digits and characters 0-9 A B C D # * specify what numbers the modem
dials. The characters A B C D # * work only when tone dialing is used. The characters are ignored when
pulse dialing is used. The characters A, B, C, and D may be disabled in countries prohibiting their use.
Pulse dialing. P selects the pulse method of dialing. P can be issued within a dial command or as a separate
command. The default method of dialing is Pulse.
Originates a Call in Answer Mode. R makes the modem handshake in answer mode so it can originate a call
to an originate-only modem.
Tone dialing. T selects the tone method of dialing. T can be issued within a dial command or as a separate
command. The default method of dialing is Pulse.
Waits for dial tone. W makes the modem wait for a dial tone before proceeding. If no dial tone is detected the
modem hangs up the telephone line and returns the NO DIALTONE result code.
Delays Processing of Next Character. A comma (,) makes the modem pause for the length of time in S-
register S8 before processing the next character in a dial string.
Waits for Quiet Answer. @ makes the modem listen for 5 seconds of silence before continuing. The modem
will wait up to the length of time in S-register S7. If 5 seconds (configurable by country) of silence are not
detected within the time period in S-register S7, the modem hangs up and returns the NO ANSWER result
code. If 5 seconds of silence are detected, the modem continues processing the other characters in the dial
string.
Timed Break Recall (Hookflash). A ! makes the modem hang up the telephone line for the length of time in
S-register S29, then take the telephone line off hook again. This is frequently used to access a PBX’s call
transfer function.
Returns to Command State after dialing. A semicolon (;) tells the modem to return to command state after
dialing without breaking the telephone line connection and without handshaking with the other modem. The
semicolon may only be used when calling a voice mail system that permits tones to transmit numbers when a
connection has been established.
P
R
T
W
,
@
!
;
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