Motorola SURFBOARD SB4100 user Manual

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

F

If Modem successfully completed boot sequence

when transmitting or receiving data.

E

Modem operational. Activity light blinks

processing for DHCP, TFTP, and TOD.

D

Downstream and Upstream acquired. Modem

C

Modem ranging upstream.

B

Modem scanning downstream frequencies.

If LED remains blinking, faulty modem.

A

Modem Power-on System Test (POST).

R

SURFboard SB4100 Cable Modem

Notes:

SURFboard SB4100 Cable Modem LED Status

R

P

OWER

Notes:

A
B
C
D
E
F

479341-001-99
J-5361-601-5K

On =

R

Rev C

ECEIVE

Off =

S

END

O

NLINE

Flashing =

A

CTIVITY

Power on

Downstream Scan

Upstream Range

Network Connect

Network Activity

Powered off / Standby

TM

Authorization

Key

and continue

Log error

enabled
switch is
standby
SB4100

Yes

(note F)
flash off

All LED’s

(note E)

complete

Initialization

CMTS

Complete

No

enabled?

BLP

Yes

Yes

config file?

CM receive

the TFTP

filename from

server and

Using TFTP

Yes

TOD?

No

Did CM get

DHCP

IP provided by

No

registration with

scan

No

Next 6 MHz

configuration file

DHCP, download

replace modem

Hardware failure,

day using server
Establish time of

Yes

No

No

No

No

No

IP address?

CM assigned

Yes

(note D)

broadcast

issue a DHCP

Modem will now

established.

RF link is

Yes

successful?

Ranging

(note C)

frequency

Using UCD

Yes

DOCSIS sync?

Yes

(Note B)

downstream

DOCSIS

scanning for

Modem begins

Yes

pass?

Did POST

(Note A)

POST

Channel ID

Upstream

times per

attempted 3

Range is

starts over.

8 dBmV and

drops down to
60 dBmV then

specified upstream
ranging power at
information begin

to maximum of

6 dBmV steps

moving up in

at 25 dBmV

ranging power
Modem begins

64 or 256 QAM?

Modem power-on