NCR S46, Руководство пользователя

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Configuring a Remote Support Modem
NCR S46 Server MP-RAS Support Guide 2-21
You can use the Configure Modem utility to edit the modem (AT) commands
used by the Diagnostic Partition and Platform CD-ROM modem utilities.
Refer to the “Enabling the Remote Support Modem” section earlier in this
chapter and to the NCR S46 Server User Guide, Chapter 3, “Hardware-
Related Utilities and Applications,” for additional information about using the
Configure Modem utility.
Note: You can edit any modem (AT) command strings used by the modem
utilities on the Diagnostic Partition or Platform CD-ROM. However, because
the CD-ROM is a read-only device, these changes are made to a RAMDisk
file. The changes are in effect from the time you enter them until the next
reboot of the system. At system reboot, the RAMDisk and its contents are
lost.
General Modem Configuration Requirements
Configure the remote access modem to perform as follows:
•
Operate at the same line speeds as console redirection. Some modems
remember the last line speed used. These modems might not operate
correctly if they are initialized at one speed (for example, 9600 baud) and
redirection is set for a different speed (for example, 19.2 K baud).
•
Force the Carrier Detect line to follow Off-Hook/ On-Hook.
•
Not return result codes or only provide result codes in originate mode.
•
Operate with echo off.
•
Maintain settings across sessions.
•
Ignore the DTR signal line. The modem must ignore DTR since this line
toggles low when the server is rebooted. Ignoring the DTR line allows the
modem to maintain a session through system reboot.
For example, assume that a remote reboot invokes a new hardware
configuration. In this case, the modem must maintain the remote session
so that support personnel can verify that the system boots correctly and
problems have been resolved.