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Configuring DTR and DSR Signals
10-20 Configuring Modem Signals
Configuring DTR and DSR Signals
Introduction
This section describes how to configure DTR and DSR signals for those access servers
that do not support the other modem signals. DSR flow control must be disabled when
you are using the various port characteristics to control the DSR and DTR signals. DSR
flow control can override the port characteristics.
Port Characteristic Effects on the DTR and DSR Signals
The following table shows the enabled port characteristic effect on DTR and DSR
signals:
Enabled Characteristic DTR and DSR Actions
SIGNAL CONTROL DTR is deasserted for 5 seconds as a
consequence of a logout; otherwise, it is
always asserted.
(SIGNAL CHECK and
DTRWAIT disabled)
Solicited remote connection is established
regardless of the state of DSR. Reception of
asynchronous data is accepted once the
connection is established.
Port is logged out if DSR is deasserted after
initial assertion.
DSRLOGOUT DTR is always asserted.
(SIGNAL CONTROL and
SIGNAL CHECK disabled
Solicited remote connection is accepted
regardless of the state of DSR.
Port is logged out if DSR is deasserted after
initial assertion.
Reception of asynchronous data is not be
accepted unless DSR is asserted.
SIGNAL CHECK DTR is always asserted.
(SIGNAL CONTROL
disabled)
Solicited remote connection will not be
accepted unless DSR is asserted.
Port is logged out if DSR is deasserted after
initial assertion.