Installing and Administering PPP

Chapter 2 29
Setting Up PPP Connections
Creating Device Files for Serial Ports
You can also use the mknod(1M) command to create device files, for
example:
mknod /dev/ttyd10 c 1 0x000001 #dial-in
The termio(7) man page describes how to derive the minor number of
the device file for dial-in, dial-out, and direct connections. Major and
minor numbers may be different from system to system. See termio(7)
for more details about configuring a serial device.
PP Two hexadecimal digits (8 bits) to indicate the port number
of this device on the serial interface. On a Series 700 serial
port, this will always be 0.
H One hexadecimal digit (4 bits) to control diagnostic access
and hardware flow control (HP J2094A only). Bit 0 controls
RTS/CTS hardware flow control.
bit 0 = 0 disables the hardware flow control
bit 0 = 1 enables the hardware flow control
M One hexadecimal digit (4 bits) to determine port access type.
Values for each bit are:
bit 3 = TI/ALP
bit 2 = 0 means simple protocol (U.S.A.)
bit 2 = 1 means CCITT protocol (Europe)
bits 0 and 1 = 00 direct, 01 dial-out modem, 10 dial-in
modem, 11 unused