Motorola SB5100 - SURFboard - 38 Mbps Cable Modem Referenzhandbuch - Seite 3

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Motorola SB5100 - SURFboard - 38 Mbps Cable Modem Referenzhandbuch
Modem power-on
Yes
Modem begins
scanning for
Scanning
downstream
begins.
Modem looks
for 64 QAM
then 256 QAM
at each
frequency.
64 or 256 QAM?
Yes
DOCSIS sync?
Modem begins
Yes
ranging at
Using UCD
power level
information, begin
12 dBmV or the
ranging power at
last valid
specified upstream
upstream
power level,
moving up in
12 dBmV steps
to maximum of
58 dBmV
successful?
(QPSK) or
Yes
55 dBmV
(16 QAM)
established.
Modem will now
issue a DHCP
Yes
CM assigned
IP address?
POST
(Note A)
No
Did POST
pass?
(Note B)
No
No
frequency
(note C)
Ranging
No
RF link is
broadcast
(note D)
No
Yes
Hardware failure,
replace modem
DHCP, download
Next 6 MHz
No
scan
(Euro-DOCSIS
8 MHz)
No
Establish time of
day using server
IP provided by
DHCP
No
Did CM get
TOD?
Yes
Using TFTP
server and
filename from
the TFTP
configuration file
CM receive
config file?
Yes
Yes
BLP
enabled?
No
Complete
registration with
CMTS
Initialization
complete
(note E)
Standby
LED on
(note F)
Yes
SB5100
standby
Access Disabled.
switch is
enabled
Log error
and continue
Key
Authorization
No
Power LED
Flashing?
(Note H)
Yes
SB5100 Network
Contact Your
Operator