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C
Initialization Information
During power up or reset, the APEX1000 undergoes an automatic initialization process
during which it loads the executable software and parameter settings that control its
operation. The APEX1000 performs initialization either by self booting from internal, non-
volatile memory or externally booting from another device. External initialization is
performed by downloading information from a LAN-connected BOOTP server.
Some initialization information can also be loaded externally from a device connected to
the APEX1000 front panel RS-232 Console Port interface. Reference
Test/Console Port
Self boot APEX1000 initialization enables it to operate:
•
Without connecting it to the headend LAN
•
In a headend LAN that does not include a BOOTP server
External APEX1000 initialization enables it to:
•
Modify the setup of an installed APEX1000 to accommodate system configuration
changes
•
Load upgraded executable software into an installed APEX1000
Self Boot Initialization
The APEX1000 begins initialization by determining the type of boot operation: BOOTP or
None (Self boot). If BOOTP is selected, it begins broadcasting BOOTP requests over its
ENET1 Ethernet port.
Self boot initialization occurs when the APEX1000 times out waiting for a reply and then
initializes itself from the information stored in its non volatile memory.
External Initialization from a LAN Resident BOOTP Server
For external initialization to occur from a BOOTP server:
•
The APEX1000 must be connected to the system Ethernet LAN on ENET1
•
A BOOTP server must be present on the LAN
•
The BOOTP server must have the APEX1000 MAC address
The APEX1000 begins initialization by broadcasting BOOTP requests over its ENET1
Ethernet port. The BOOTP server receives the APEX1000 BOOTP requests and provides
a BOOTP response packet containing the assigned IP addresses and bootfile entries,
from which the APEX1000 initializes itself.
Appendix C • Initialization Information
APEX1000 All-Purpose Edge QAM Software Version 2.4.x • Installation and Operation Manual
573408-001-a
for more information.
Appendix C
RS-232
B
294
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