IBM 8270, Инструкция по установке и обслуживанию

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!B Fuses 1 and 2 (8270-800 only)
!C Fuses 7 and 8 (8270-800 only)
!D Fuse 6 (8270-800 only)
– The third display character indicates the required action:
H Hardware failure. Replace the component identified by the first 2
characters in the message.
Note: Replacement of fans, fuses, and the 8270-600 power supply
can be done by qualified service personnel only. See “Obtaining
Service” on page 5-6.
C Software failure. Download new software and reconfigure.
C1 - Boot image
C2 - Main image
X UFC is not installed in a valid slot. Move the UFC to a valid slot.
? The failure cannot be isolated to a specific component. See
Chapter 5, “Troubleshooting and Service.”
EIA 232 Port
This nine-pin, male, management port functions as a DTE port.
With this port you can attach a VT100 terminal or VT100 terminal emulator to use
when customizing the switch’s configuration, monitoring switch activity and switch
status, testing the switch, or downloading software (see Chapter 4, “Updating
Software”). Console access can be either local, by direct attachment to the EIA
232 port, or remote, through a modem connection.
When enabled, the EIA 232 port automatically detects the baud rate of the terminal
to which it is attached.
Reset Button
The Reset button resets the hardware and software and clears all tables and
memory, including the address tables. Pressing the Reset button does not clear
the user-set configuration parameters; those values are stored in nonvolatile
random access memory (NVRAM). For more information about the Reset button,
refer to
Planning, Configuration, and Operation.
System Request Button
The System Request button is located next to the Reset button. It is unlabeled and
is recessed to prevent unintentional activation. Pressing this button causes the
System Request Menu to appear on the console device attached to the EIA 232
port. See “Initiating a Download with the System Request Menu” on page 4-2 for
more information.
Universal Feature Cards
The 8270 contains UFC slots (see Figure 1-2 on page 1-2 or Figure 1-3 on
page 1-3) that accommodate optional, field-installable UFCs to provide network
connections. Currently available UFCs provide the following types of connections:
¹
Token-Ring UTP/STP
¹
Token-Ring optical fiber
¹
ATM network
1-8
8270 Nways LAN Switch Models 600 and 800