Rs-232 Interface Commands - Multitech MT5634HD16 User Manual

MT5634HD8/16 User Guide
Nn Modulation Handshake
n = 0 or 1
Default: N1
This command controls whether or not the local modem performs a negotiated handshake with the
remote modem at connection time, when the communication speed of the two modems is different.
N0 enables handshaking only at the communication standard specified by S37 and the ATB command.
N1 always begins the handshake only at the communication standard specified by S37 and the ATB
command, but allows fallback to a lower speed as the handshake proceeds. This is the default.
\Tn Inactivity Timer
n = 0
Default: \T0
The inactivity timer specifies the length of time, in minutes, that the modem will wait before disconnecting
when no data is sent or received. This timer is specified in register S3. The \T0 command disables the
inactivity timer.
Yn Long Space Disconnect
n = 0
Default: Y0
When two modems are connected in reliable mode, a link disconnect request packet is sent to request a
disconnect. In non-error correction mode, there is no "polite" way to request a disconnect. As a result,
some "garbage" may be received when a hang-up command is issued.
Y0 disables the modem's use of the break signal.

RS-232 Interface Commands

These commands define how an MT5634HD8/16 modem will use and respond to standard RS-232 signals.
&Cn Carrier Detect Control
n = 0 or 1
Default: &C1
The &C command lets you control the Carrier Detect (CD) signal on the RS-232/V.24 interface. This is a
signal from the modem to your computer indicating that the carrier signal is being received from a remote
modem. Normally, CD goes "high" (turns on) when the modem detects a carrier on the communications
link, and "drops" (turns off) when it loses the carrier. By using &C, you can force the signal to stay high, or
to drop momentarily when the remote modem disconnects. This option is useful with some CBX phone
systems and mainframe front ends, which require CD to act in this manner.)
&C0 ignores the state of the carrier from the remote modem. CD is forced high.
&C1 allows CD to act normally—to go high when the modem detects a carrier, and to drop when it loses
the carrier.
&Dn Data Terminal Ready Control
n = 0, 1, 2, or 3
Default: &D2
24 CommPlete Communications Server