Multitech MultiModem ZBA Series At Commands Reference Manual page 11

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Multi-Tech Systems, Inc. AT Commands for the MT5634 Family of Products (S000272J)
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Xn Result Code Selection
n = 0–7
4
X0 Basic result codes (e.g., CONNECT); does not look for dial tone or busy signal.
X1 Extended result codes (e.g., CONNECT 46000 V42bis); does not look for dial tone or
busy signal.
X2 Extended result codes with NO DIALTONE; does not look for busy signal.
X3 Extended result codes with BUSY; does not look for dial tone.
X4 Extended result codes with NO DIALTONE and BUSY.
X5 Extended result codes with NO DIALTONE and BUSY.
X6 Extended result codes with NO DIALTONE and BUSY.
X7 Basic result codes with NO DIALTONE and BUSY.
Zn Modem Reset
n = 0 or 1
None
Z0 Resets modem to profile saved by the last &W command.
Z1 Same as Z0.
&Cn Data Carrier Detect (DCD) Control
n = 0, 1, or 2
1
&C0 Forces the DCD circuit to be always high.
&C1 DCD goes high when the remote modem's carrier signal is detected, and goes low
when the carrier signal is not detected.
&C2 DCD drops on disconnect for time set by S18, then goes high again (for some PBX
phone systems).
&Dn Data Terminal Ready (DTR) Control
n = 0, 1, 2, or 3
2
&D0 Modem ignores the true status of the DTR signal and responds as if it is always on.
&D1 If DTR drops while in online data mode, the modem enters command mode, issues
an OK, and remains connected.
&D2 If DTR drops while in online data mode, the modem hangs up. If the signal is not
present, the modem will not answer or dial.
&D3 If DTR drops, the modem hangs up and resets as if an ATZ command were issued.
&En XON/XOFF Pacing Control
n = 12 or 13
12
&E12 Disables XON/XOFF pacing.
&E13 Enables XON/XOFF pacing. (&K4 must also be set.)
Note: &E13 has no effect if hardware control (&K3) is selected.
&Fn Load Factory Settings
n = 0
None
&F0 Loads factory settings as active configuration.
Note: See also the Z command.
&Gn V.22bis Guard Tone Control
n = 0, 1, or 2
0
&G0 Disables guard tone.
&G1 Sets guard tone to 550 Hz.
&G2 Sets guard tone to 1800 Hz.
Note: The &G command is not used in North America.
Chapter 1 – AT Commands
11