IBM xSeries 300, Service Manual

Page: 55 / 160

In the next steps, you are instructed to manipulate the front panel buttons of
the modem. Unless the step suggests otherwise, do not press them for longer
than one second.
The next step resets the modem options to the factory default configuration 0.
Go to step 6 if the modem has never been used.
5. ____ Set the modem power switch to OFF, then hold the
↑
key pressed and
set the power switch to ON. When the message SELFTEST RUNNING
appears, release the
↑
key.
After about 15 seconds the message changes to:
If this sequence does not occur, the modem is defective and should be
replaced.
6. ____ The next steps are used to test the modem’s interface. Go to step 10 if
you do not want to test the modem’s public switched network interface.
7. ____ On the modem operator panel:
a. Press the
↑
until the DTR (C108) message appears on the top row.
b. Press the
→
key until the Forced On message appears on the bottom row.
c. Press the Enter key twice to select the option and to return to the modem
operational mode message.
8. ____ Dial the modem phone number from another telephone. You should hear
the ringing tones and then the 2100-Hz answer tone from the called modem in
the handset of the dialing telephone. If you hear the answer tone, go to step 10.
Otherwise, continue with step 9.
9. ___ If you do not hear the modem answer tone, verify that the telephone line is
operating correctly. In most countries, you can do this by replacing the modem
with a handset and then attempting a second time to dial the modem phone
number from another telephone to verify that the handset rings correctly.
Connect the modem to the public switched network again and try dialing the
modem phone number again. Observe the front panel OH light. This light turns
off when the modem answers. If this attempt to call the modem fails, the
modem is defective and should be replaced.
10. ____ Set the modem power switch to OFF.
Note: Perform the following steps only if your DTE is already installed and
operational.
11. ____ Connect the 25-pin V.24 cable from the DTE to the 25-pin connector on
the modem rear panel. Fasten the connector retaining screws.
12. ____ Set the modem power switch to ON. Wait until the modem operational
message appears on the operator panel (about 15 seconds).
Now the modem is ready for operation. You can try it with your system. If you
observe a basic system problem, such as the DTE not being able to send
commands to the modem successfully, verify again that your individual modem
configuration parameters match your system requirements.
If you have a problem because the dialing tone is not provided by your
PBX or exchange, set the modem as follows:
13. ____ Power off the modem.
AT CMD ec aa
td_ rd_ dsr_ II_
Figure 1-47. 7858 Operator Panel Display
Installing the NAS and Its Modem
Chapter 1. Installing and Configuring the NAS and Its Modem
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