Setting The Flow Control; Hanging Up A Line - Lucent Technologies PortMaster 4 Configuration Manual

Table 9-2
Option
none
even
odd
strip
To set the parity for a modem and its port, use the following command:
Command> set C0 parity even|none|odd|strip

Setting the Flow Control

The PortMaster supports both software flow control and hardware flow control.
Software flow control uses the ASCII control characters DC1 and DC3 to communicate
with the attached device and to start and stop the flow of data.
To set software flow control for a modem, use the following command:
Command> set C0 xon/xoff on|off
Hardware flow control allows the PortMaster to receive data from the attached device
by raising the Request to Send (RTS) signal on pin 4 of the RS-232 connector. The
PortMaster sends information to the attached device only when the Clear to Send (CTS)
modem line on pin 5 of the RS-232 connector is raised.
To set hardware flow control for a modem, use the following command:
Command> set C0 rts/cts on|off
Note – Because it is more reliable, you should always use hardware flow control if it is
available. Do not use both hardware and software flow control on the same port.

Hanging Up a Line

You can specify whether the DTR signal is dropped and the modem disconnected after a
session is terminated. If line hangup is enabled and the session is terminated, DTR is
held low, signaling the modem to disconnect. If line hangup is disabled, the DTR signal
does not drop and the modem does not hang up when the user session terminates.
To set line hangup for a modem, use the following command:
Command> set C0 hangup on|off
Note – Resetting the port administratively with the reset command always drops DTR.
Using External Modems
Parity Options
Description
Assumes 8 data bits, 1 stop bit, and no parity bit. This is the
default.
Assumes 7 data bits, 1 stop bit, and even parity.
Assumes 7 data bits, 1 stop bit, and odd parity.
Assumes 8 data bits and 1 stop bit. The parity bit is stripped
from the data stream when it is received by the PortMaster
Configuring Ports for Modem Use
9-7