Lucent Technologies PortMaster - Manual (Page 167)

Using Modems 10-9
Configuring Ports for Modem Use
To set software flow control for a modem, use the following command:
Command> set S0 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 S0 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 S0 hangup on|off
Note – Resetting the port administratively with the reset command always drops DTR.
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