IBM 3746-900, Installation And Maintenance Manual

Page: 45 / 264

Step 12. 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.
Step 13. Set the modem power switch to ON. Wait until the modem operational
message is displayed on the operator panel (about 15 seconds).
If the modem is connected to an asynchronous DTE that can send AT
commands to the modem, you can use the DTE to configure the modem
to match your communication system requirements. Otherwise, the
modem can be configured through the operator panel, see “Setting the
7858 Connected to the COM1 Connector (ASYN)”
Note: Ten factory-redefined modem configurations are available. You
could retrieve the factory configuration that better matches your system
requirements, make any further configuration adjustment you should
require, and save your modem configuration in one of the ten user
configuration slots.
Step 14. 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 are matching your system
requirements.
If you have a problem because the dialing tone is not provided by
your PBX or exchange set the modem as follow:
Power OFF the modem.
Power ON the modem while you are pushing Enter at the same time.
Release Enter key when the message
DATAPUMP TEST
is displayed.
After this, the modem performs the dial through the switchboard without
looking for dial tone (Blind dial ATX1). This setting is maintained even if
the modem is powered OFF and ON again.
Step 15. If you have a problem while using the modem, refer to the "Problem
Determination" chapter in the 7858 Professional Modem Guide to
Operation , GA13-1981.
Setting the 7858 Connected to the COM1 Connector (ASYN)
1. Power OFF the modem.
2. Press and hold the
↑
key while you power ON the modem.
3. The modem is set to Factory 0 in AT command mode.
Saving the Configuration of the 7858
If you want to save the configuration just defined, in order to have it loaded again at
the next modem reset, perform the following steps:
1. Press the
↓
key until the
CONFIGURATIONS
message
displayed the top row.
2. Press the
→
key until the Store User Conf.
message is displayed in the bottom row.
3. Press Enter to select the option.
Chapter 1. Installing and Setting Up Your Service Processor
1-25