User Manual

64
ISI5634PCI/4/8 User Guide
Command: &Cn Data Carrier Detect (DCD) Control
Values: n = 0, 1, or 2
Default: 1
Description: &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).
Command: &Dn Data Terminal Ready (DTR) Control
Values: n = 0, 1, 2, or 3
Default: 2
Description: &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, is-
sues 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 is-
sued.
Command: &En XON/XOFF Pacing Control
Values: n = 12 or 13
Default: 12
Description: &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.
Command: &Fn Load Factory Settings
Values: n = 0
Default: None
Description: &F0 Loads factory settings as active configuration.
Note: See also the Z command.
Command: &Gn V.22bis Guard Tone Control
Values: n = 0, 1, or 2
Default: 0
Description: &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.
Command: &Kn Flow Control Selection
Values: n = 0, 3, or 4
Defaults: 3
Description: &K0 Disables flow control.
&K3 Enables CTS/RTS hardware flow control.
&K4 Enables XON/XOFF software flow control.