Motorola SURFboard SB4100 User manual

SURFboard SB4100 Cable Modem LED Status

A

B

C

D

E

F

Modem Power-on System Test (POST).

If LED remains blinking, faulty modem.

Modem scanning downstream frequencies.

Modem ranging upstream.

Downstream and Upstream acquired. Modem

processing for DHCP, TFTP, and TOD.

Modem operational. Activity light blinks

when transmitting or receiving data.

If Modem successfully completed boot sequence

and all LEDs blink off, check the "Standby Switch.”

Power on

Downstream Scan

Upstream Range

Network Connect

Network Activity

Powered off / Standby

POWER RECEIVE SEND ONLINE ACTIVITY

E

F

D

C

B

A

Notes:

TM

Notes: SURFboard SB4100 Cable Modem

R

R

On = Off = Flashing =

479341-001-99

Rev C

J-5361-601-5K

Next 6 MHz

scan

Initialization

complete

(note E)

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

No

No

No

No

No

No

No

No

Yes

Modem power-on

POST

(Note A)

Complete

registration with

CMTS

SB4100

standby

switch is

enabled

Log error

and continue

Modem begins

scanning for

DOCSIS

downstream

(Note B)

Using TFTP

server and

filename from

DHCP, download

the TFTP

configuration file

Establish time of

day using server

IP provided by

DHCP

Hardware failure,

replace modem

Modem begins

ranging power

at 25 dBmV

moving up in

6 dBmV steps

to maximum of

60 dBmV then

drops down to

8 dBmV and

starts over.

Range is

attempted 3

times per

Upstream

Channel ID

Did POST

pass?

All LED’s

flash off

(note F)

CM assigned

IP address?

Ranging

successful?

DOCSIS sync?

64 or 256 QAM?

BLP

enabled?

CM receive

config file?

Did CM get

TOD?

Using UCD

information begin

ranging power at

specified upstream

frequency

(note C)

RF link is

established.

Modem will now

issue a DHCP

broadcast

(note D)

Key

Authorization

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