To set up a remote terminal session, dial into the service processor and start the system. After the operating system is loaded and initialized, the connection will be dropped. At this point, you call the server back and the operating system will answer and offer you the login prompt.
Prevention Strategy
The disconnect is caused by the operating system when it initializes the Primary Console. The modem tests listed above are conducted with the remote terminal selected as the primary console to manifest the modem's response to DTR transitions.
vIf a local ASCII terminal or a graphics console is to be a permanent part of your server, then make one of them the primary console. Your remote terminal will no longer experience the connection loss.
vIf a local console is not a permanent part of your server, you can still assign either the unused graphics console or the unused serial port as the primary console. This gives you the desired seamless connection at your remote terminal.
vIf you choose to use the unused serial port as the primary console, some initialization traffic will be sent to any serial device attached to that port. As a result, that serial device's connection and function could be affected. These impacts may make that port unattractive for devices other than a temporary local ASCII terminal.
Modem Configuration Samples
Sample File modem_z.cfg
#
#COMPONENT_NAME: (ESPSETUP) ENTRY SERVICE PROCESSOR SETUP Z
#FUNCTIONS: Modem configuration file for many early Hayes* compatible modems.
#This example uses the ATZ reset command to choose the factory defaults.
#This setup will work for many modems, but it is required for early vintage
#modems which respond to neither the ATZ0 reset command nor the extended (&)
#commands. Refer to your modem manual.
#
#* Trademark of Hayes Microcomputer Products, Inc.
#(C) COPYRIGHT International Business Machines Corp. 1996
#All Rights Reserved
#Licensed Materials - Property of IBM
#
#US Government Users Restricted Rights - Use, duplication or
#disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
#If the modem has configuration switches, they should be set to the
#factory default settings.
ICDelay 1 |
|
| ||
DefaultTO 10 |
|
| ||
CallDelay 120 |
|
| ||
# | AT | Attention Code | , | Inserts delay in dialing commands |
# | Z | Reset to factory defaults Q0 | Turn on responses | |
# | E0 | Turn echo off | Q1 | Turn off responses |
Appendix E. Modem Configurations 177
