Configuring DTR and DSR 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

Solicited remote connection is established

DTRWAIT disabled)

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

Solicited remote connection is accepted

SIGNAL CHECK disabled

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

Solicited remote connection will not be

disabled)

accepted unless DSR is asserted.

 

Port is logged out if DSR is deasserted after

 

initial assertion.

10-20 Configuring Modem Signals