Specifications

Booting IPmux-4 A-1

Appendix A

Boot Sequence for

Downloading Software

A.1 General

This chapter provides a description of the IPmux-4 boot procedure via an ASCII

terminal for downloading software.

The IPmux-4 software is stored in the flash memory in two sections, in the boot

sector and in the file system. The boot sector holds a boot program that calls up

the rest of the program from the file system.

The file system can hold two compressed copies of the IPmux-4 code. One copy is

called the operating file, and the other is called the backup file. The operating file

is the default-executable IPmux-4 code. The backup file is used whenever the

operating file is absent or corrupted.

A.2 Booting IPmux-4

General

IPmux-4 boots up automatically. After powering up, no user intervention is

required, except when the user wants to access the file system to modify or update

the software or the IPmux-4 configuration.

Boot Sequence

The following is a description of the boot sequence. If the system is working

normally, the entire process is completed within two minutes. Refer to Figure A-1.

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