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Configuring the 7852-400 Modem
The 7852 Model 400 is one of the recommended modem choices for the Electronic
Service Agent. From the factory, there are DIP switches on the side of the modem
that need to be set to make the asynchronous mode the default mode. Switch 12
needs to be set to the off (down) position for asynchronous mode. Switch 11 needs
to be set to the on (up) position to enable AT Responses. If you want to enable the
auto-answer capability of the 7852-400 modem to perform remote dial-in to the NAS
Gateway 500, Switch 5 needs to be set to the on (up) position to enable
auto-answer. If your security requirements do not allow remote dial-in, switch 5
needs to be set to the off (down) position to disable auto-answer. See "IBM
7852-400 DIP switch settings" on page 257 for proper setting of switches.
To set up and initialize the 7852-400 for operation:
1. Set switches 5, 11 and 12 to their appropriate position.
2. Connect the RS232 cable to the modem and to a serial port.
3. Connect the telephone cable (sent with the modem) to the modem connector
4. Connect the modem power cable to the modem and the transformer to the
5. Power-on the modem (switch in rear).
Configuring the 7857-017 or 7858-336 Modem
The 7857 is one of the recommended modem choices for the Electronic Service
Agent. The 7858-336 is the replacement modem for the 7857. These procedures
aid in the proper configuration of the 7857-017 or 7858-336, or set a known
configuration state.
To set up and initialize the 7857-017 or 7858-336 for operation:
1. Connect the RS232 cable to the modem and to a serial port.
2. Connect the telephone cable (sent with the modem) to the modem connector
3. Connect the modem power cable to building power.
4. Power-on the modem.
5. Wait for the main display panel.
Use the following procedure to place the modem in a known configuration. After the
modem is powered on and local tests have completed, there should be two lines of
configuration information displayed on the modem LCD screen.
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NAS Gateway 500 Administrator's Guide
labeled LINE (middle connector), and to the telephone wall jack.
building power.
labeled PSTN, and to the telephone wall jack.
1. Press ↓ 12 times until the CONFIGURATIONS message is displayed.
CONFIGURATIONS D12
2. Press → until the Select Factory message is displayed.
CONFIGURATIONS D12
Select Factory .
3. Press Enter to select the Factory configuration option. Press ↑ until 0 is
displayed.
CONFIGURATIONS D12
Select Factory 0.
4. Press Enter to load the predefined factory configuration 0.
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