Modem Configuration requires familiarity with both the specific OS and the specific modem being used.
While the following procedure is sufficient for most cases, it may be necessary to take additional steps to
properly configure your modem or to set up the OS for a specific application.

1) The Cable

• In inittab, create entries for the appropriate tty (see below for tty naming information), using the format of the example modem device in /etc/inittab. For modems it is recommended that mgetty is used.
  If your distribution doesn't have an example, consult these examples, or your system documentation.

• Set the device for respawn in /etc/inittab.

init q [re-read inittab entries]

NOTE: This step requires that the 'uucp' package be installed.

chown uucp:uucp /dev/[ttyid]*

Example for RAS/Xp devices:

chown uucp:uucp /dev/ttyG*

Example for AccelePort Xem devices:

chown uucp:uucp /dev/ttyD*

• Connect to the modem to train the DTE baud rate:

cu -l /dev/[ttyname] -s 57600
at&w [train modem to port speed] ~. [ tilde period, to end cu ]

• Finish configuring the port for normal DCD functionality and hardware flow control:

ditty altpin ctspace rtspace -ixon -ixoff [ttyname]

For RealPort:

ditty-rp ctspace rtspace -ixon -ixoff [ttyname]


*NOTE: Only use the altpin setting if you are using 8-wire (non-digi) cables on your modem. On PortServer and Digi One products, this is set on the units themselves.

Possible error messages when doing the step 2, above:

• getty respawning too rapidly -- check /etc/inittab file for errors.