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- Instructions for installing an atdialer. In this example, atdialSP28 is used.
-
- 1. Move the dialer configuration (default) file into the defaults directory.
- On 3.2v4, the defaults directory is /etc/default.
- On 5.0, the defaults directory is /usr/lib/uucp/default.
- 2. Make it readable by uucp.
- chmod a+r atdialSP28
- 3. Link the atdialer program to the same name as the configuration file.
- cd /usr/lib/uucp
- ln atdialer atdialSP28
-
- The atdialer is now ready to use. Refer to it by name in the 5th field of the
- /usr/lib/uucp/Devices file.
-
- Some of the atdialers available here use a fixed DTE speed. This means that
- communications between the modem and the system always occur at the same speed,
- regardless of what speed the modem communicates with the remote modem at. The
- modem converts between the two Baud rates, buffering data and invoking flow
- control as neccessary. The advantage of this is that it allows the use of
- modem features that intrinsically cause the DCE (modem to modem) data rate to
- vary ( particularly compression and error detection) as well as communications
- at speeds that the serial driver does not understand (e.g. 14400). Also, it
- avoids the need for dialup users to cycle between different Baud rates by
- sending break sequences.
- Using a fixed DTE speed successfully has two requirements. First, the modem
- and serial port must both have functioning hardware (RTS/CTS) flow control.
- The dialer takes care of configuring this, by telling the modem to do hardware
- flow control and by setting the serial port to use it. Additionally, you must
- ensure that the cabling between the modem and serial port is sufficient for
- hardware flow control. A full 25-conductor cable will keep things simple.
- Second, everything that uses the modem must talk to it at the fixed speed.
- This means setting the speed for the modem line in the Devices file to the
- fixed speed, and if the line is enabled for dialin, choosing a gettydefs tag
- that will select a gettydefs entry with the appropriate speed (for example, "o"
- for 38400 Baud).
-