IBM RS/6000 44P - Manual (Page 190)

PTSN (for Public Telephone Switched Network). The service processor
expects to use the modem on the public network, so the telephone line
should attach to the PTSN connector.
If No, continue with step 3.
3. Does your modem respond to the extended command set (prefixed with & )?
If Yes, go to step 5.
OR
If No, continue with step 4.
4. Does your modem respond to:
v ATZ reset command,
OR
v ATZn reset commands, where n can be 0, 1, and so on?
If ATZ, configuration file modem_z.cfg is recommended. If ATZn, configuration
file modem_z0.cfg is recommended.
Go to step 7.
5. Does your modem command set include a test for V.42 error correction at the
remote modem (often called “Auto-Reliable Mode”)?
If Yes, disable this test. You can use sample configuration files
/usr/share/modem_m0.cfg
OR
/usr/share/modem_m1.cfg as models to help you create a file for your particular
modem. See “Customizing the Modem Configuration Files” on page 173. Go to step
7.
If No, go to step 6.
6. Does your modem respond to:
v AT&F reset command,
OR
v AT&Fn reset commands, where n can be 0, 1, and so on.?
If AT&F, configuration file modem_f.cfg is recommended.
If AT&Fn, configuration file modem_f0.cfg or modem_f1.cfg is recommended,
depending on which provides the hardware flow control profile.
7. You have completed selection of the configuration file.
If your modem configuration selection is not available in the Service Processor
Modem Configuration Menu, you must access it through the Configure Remote
Maintenance Policy Service Aid.
If you find it necessary to adjust any of these configuration files, do so with
reference to the manual that came with your modem. It is recommended you select
settings that enable hardware flow control and respond to DTR.
Note: Some older modems do not respond to the commands X0 or &R1. You
should edit out these commands from the modem configuration file if yours is
such a modem. See your modem manual for more information.
172 44P Series Model 170 User’s Guide