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Attaching Devices to the Asynchronous Serial Interface

HP-UX version 11.00.01 Configuring Asynchronous Serial Interfaces 7-5

Null modem cable pins must be correctly configured. If the pins are not correctly

configured, getty operations will not work. The correct pin positions are shown

in Figure 7-2.

Figure 7-2. Null Modem Cable Pin-Outs

Configuring in the Device

You might need to add a getty entry to the /etc/inittab file for each new

device if a login is needed. The easiest way to perform this configuration is by

using the SAM interface. SAM creates the appropriate device files when adding an

asynchronous serial device and will let you know if you are missing drivers if it

cannot find a particular interface.

If you are not using SAM, you will need to create the device special files using

mknod. For more information, see the mknod(1M) or mksf(1M) man pages.

The baud rates supported are:

■ 50 baud

■ 75 baud

■ 110 baud

■ 134 baud

■ 150 baud

■ 200 baud (not available for Continuum Series 600 and 1200 systems)

■ 300 baud

■ 600 baud

■ 1200 baud

■ 2400 baud

DCE DTE

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Seagate ST118273WC Guía de usuario Pagina 77