Next6
MHz
scan
Initialization
complete
(noteE)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
Yes
Modempower-on
POST
(NoteA)
Complete
registrationwith
CMTS
Logerror
andcontinue
Modembegins
scanningfor
DOCSIS
downstream
(NoteB)
UsingTFTP
serverand
filenamefrom
DHCP,download
theTFTP
configurationfile
Establishtime
of
dayusing
server
IPprovided
by
DHCP
Hardwarefailure,
replacemodem
Modembegins
rangingpower
at25
dBmV
movingup
in
6dBmV
steps
tomaximum
of
60dBmV
then
dropsdown
to
8dBmV
and
startsover
.
Rangeis
attempted3
timesper
Upstream
ChannelID
DidPOST
pass?
CMassigned
IPaddress?
Ranging
successful?
DOCSISsync?
64or
256QAM?
BLP
enabled?
CMreceive
configfile?
DidCM
get
TOD?
UsingUCD
informationbegin
rangingpower
at
specifiedupstream
frequency
(noteC)
RFlink
is
established.
Modemwill
now
issuea
DHCP
broadcast
(noteD)
Key
Authorization
