Multi-Tech Systems ISIHP-2U - Manual (Page 90)

90 MultiModemISI Hybrid Series, ISIHP-2S/2U/4S/4U/4SD
Modem AT Commands & S-Registers
n = 0
Default: none
This command displays specific product information about your modem.
I0 or I returns the controller firmware version number. Use this command to
identify your modem’s firmware level before calling Multi-Tech Technical
Support. (Same as I3.)
&Bn Dummy command
&V View Current Configuration
Default: none
Use the &V command to display the active modem settings.
Flow Control Commands
Flow control refers to techniques used by data terminal equipment and the
modem to pause and resume the flow of information between them. It
prevents a device from accepting more data than it can handle. The modem
implements flow control in both directions. When the modem halts the flow
of data, it is called flow control. When the computer halts the flow, it is
called pacing.
&Kn Local Flow Control Selection
n = 0, 3, or 4
Default: &K3
Allows you disable flow control and enable hardware or software flow
control.
&K0 completely disables data flow control initiated by the modem. (Same
as \Q0.)
&K3 enables modem’s use of Clear to Send (CTS) signal on the RS-232/
V.24 interface to regulate data flow. When CTS drops, data flow is
suspended until the signal goes high (on) again. This method of flow control
works in conjunction with pacing (i.e., computer-initiated flow control),
which uses the Request to Send (RTS) signal on the RS-232/V.24 interface.
Hardware flow control cannot be enabled unless an active error correction
protocol is selected. This is the factory default setting. (This is the same as
\Q3.)