Z02205 Datasheet, PDF (18/30 Pages) Zilog, Inc. – MODEM CONTROLLER IDEAL FOR LOW POWER CONSUMPTION, SMALL SIZE REQUIREMENTS

Z02205
Modem Controller
Command
X
Call Progress
#CID= Caller Id Options
ZiLOG
Table 2. AT Command Set (Continued)
Function and Description
The X command controls whether or not a busy signal or dial tone is detected when
dialing. The X command also limits the result codes the modem returns when dialing.
The operation of the X command is configurable for operation in different countries.
X0
Neither busy signal nor dial tone are detected. When a telephone line
connection is made, the result code does not indicate the telephone line data
rate.
X1
Neither busy signal nor dial tone are detected. When a telephone line
connection is made, the result code indicates the telephone line data rate.
X2
Busy signal is not detected. Dial tone is detected. When a telephone line
connection is made, the result code indicates the telephone line data rate.
X3
Busy signal is detected. Dial tone is not detected. When a telephone line
connection is made, the result code indicates the telephone line data rate.
X4
Both busy signal and dial tone are detected. When a telephone line
connection is made, the result code indicates the telephone line data rate.
This is the default value in North America.
The @ and W dial modifiers are not affected by the X command. The @ dial modifier
may return the result codes 8 (NO ANSWER) or 7 (BUSY) each time it appears in the
dial string. The W dial modifier may return the result codes 6 (NO DIALTONE) or 7
(BUSY) each time it appears in the dial string.
The #CID= command controls how the modem displays
North American caller identification information. The #CID=
command is valid only if the Modem Controller software has
been compiled to support Caller ID. If the software has not
been compiled to support Caller ID then the modem responds
with an ERROR result code to a #CID= command.
Caller Id information is displayed only when it is provided by
the telephone company, and only when the terminal data rate
is 2400 bps. Lower data rates are too slow to display the
Caller Id information.
#CID=0 Do not display caller identification information.
This is the default value.
#CID=1 Display the information in as formatted data.
#CID=2 Display the information as unformatted data.
#CID=?
Display the current setting of the #CID=
command option.
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PS001000-MOD0599