Specifications

Configuring Basic Device Characteristics
10-10
Configuring the FLOW CONTROL Characteristic
Introduction
The FLOW CONTROL characteristic allows the access server to start and stop
data transfer between the port and the attached device. Flow control prevents
data losses due to lack of buffering space.
The FLOW CONTROL characteristic does not apply to data transfer between the
access server and a network resource. For a particular session, however, the
network resource might manage FLOW CONTROL between the port and the
host.
Flow Control Types
The types of FLOW CONTROL that you can configure are:
• XON/XOFF
• DSR
• CTS
• No Flow Control
• Flow Control Direction
XON/XOFF
When the access server use XON/XOFF FLOW CONTROL on a port, it sends
• An XON character to start the data transfer between the port and the attached
device
• An XOFF character to stop the data transfer between the port and the attached
device
XON/XOFF is the type of FLOW CONTROL that Digital Equipment
Corporation’s terminals, personal computers, printers, and modems use.
When to Use
You must use XON/XOFF FLOW CONTROL when you use:
• DSR logout (See Specifying DSRLOGOUT in this chapter.)
• Signal check (See Specifying SIGNAL CHECK in Chapter 10.)