If no, continue with step 2 below.
2. Is your modem an IBM 7857-017?
If yes, use modem configuration file modem_m1_sp and go to step 7.
Note: The IBM 7857-017 modem has two telephone line connections on the back
of the unit. One is marked LL (for Leased Line), and the other is marked
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. Also, see the note on page 476.
If no, continue with step 3 below.
3. Does your modem respond to the extended command set (prefixed with &)?
If yes, go to step 5. If no, continue with step 4.
4. Does your modem respond to either of the following:
v ATZ reset command
or
v ATZn reset commands, where n can be a numeral
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, this test must be disabled. Sample configuration files
/usr/share/modem_m0.cfg or /usr/share/modem_m1.cfg can be used as models to
help you create a file for your particular modem. See “Customizing the Modem
Configuration Files” on page 621 for more information. Go to step 7.
If no, go to step 6.
6. Does your modem respond to either of the following:
v AT&F reset command,
or
v AT&Fn reset commands, where n can be a numeral
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. Selection of the configuration file is complete. If you find it necessary to adjust any
of these configuration files, do so with reference to the documentation 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. Edit these
commands out of the modem configuration file if yours is such a modem.
See your modem documentation for more information.
620 Service Guide
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