I have connected a router t o the cable modem but cannot acces s the
Internet or send or recei
Plug the modem’s power cube into an outlet and then into the modem’s POWER jack. It
may take several minutes for the modem to register with the cable system. If the
modem’s front panel STATUS, US, and DS lights do not stay on steady after a
reasonable amount of time, go to Troubleshooting.
CABLE MODEM QUICK STAR
¾ Connect the cable modem directly to a PC following the instructions
above. If the cable modem works prope
rly when connected directl y to
your computer, most likely the problem is caused by the router’s
configuration or installation.
Power-up the router. Wait for the router to complet e its power-up sequence. The
LINK light should come on.
First try shutting down and restarting each computer connected to the
router. Power cycle your cable modem and allow time for it to
resynchronize with the cable system.
You may need to restart some or all of the computers attached to t he router.
You should follow any directions that your c able provider has given to you. Your cable
company may instruct you to tell them your cable modem’s MAC address after you
complete the hardware installation.
You need to connect the cable modem to a cable modem service that uses any of the
popular DOCSIS standards – 3.0, 2.0, 1.1, or 1.0.
If you need to get cable modem
service, please speak with yo
ur cable service provider.
You may also need to check that the DHCP client on the router’s WAN
port is enabled. If you need help, look in your router’s manual or
contact your router manufacturer.
Using a computer connected to the router, open the computer’s browser and go to a
website to check that the connection between
your cable modem and router is working
You need to connect a computer or router to the cable modem using an Ethern et cable.
The computer can be a Windows, Macintosh, or Linux computer. The router must ha
one or more Ethernet ports, and ma
y include wireless capability. Instructions for making
this connection are below.
If that does not solve the problem, you may need to contact your cable
service provider and give them th
e MAC address of the router’s WAN
If you have a problem con necting to the router, please test the cable connection
by connecting the cable modem directly to a PC by following the instructions in the
previous section. If the cable modem work
ed properly when connected directly your
computer, most likely the problem is caused by
the router’s configuration or installation.
Check your router’s documentation for help.
ur Ether net M AC Address
If you need assistance, please
go to www.zoom.com
Your cable company may ask for your cable
modem’s MAC address. This is on the bottom
of your cable modem. You may want to write it down here
for quick reference:
and select Technical Support for help
via our Web SmartFacts system, email or phone.
Safety Issues & Warnings
Your cable ser
vice pro vider may pro vide a cable mode m starter kit
Some cable ser
vice providers s upply a ca ble modem sta rter kit that c an be useful when
you install yo
ur cable mod em. The kit m ay include a coaxial cable fo r connecti ng
between a wall jack and yo
ur cable modem. (These are also available at most
.) The ki t will include instruct ions, and may also include a C D with
you receive a kit lik e this, we rec ommend that you read t he kit’s
nd use them to ins tall your Zoom cable mod em. This cable mo dem is
DOCSIS 3.0 certified by CableLabs, and co
nnects like a normal cable modem. You will
need to plug i
n the cabl e modem’s po wer cube, con nect to cabl e modem se rvice using
a coaxial cable,
and connect the included Ethern et cable betwe en the cable mo dem
and a comput
er or router.
Power CATV Reset ETH
How to con
nect to a computer if you don’t h ave a cable company’s starter kit
Make sure that your computer is on.
Plug one end of the Ethernet cable into the modem’s ETH jack and plug the othe r end
into your computer’s Ethernet jack. The
LINK light of the modem s hould be lit to show
the Ethernet connection.
Connect the modem to a coaxial cable for t he cable service. T he cable service is
carried on the same cables and connectors
as your cable TV service.
You can connect a coaxial cable between an open cable service wall jack
and the cable modem. (If no wall jack is open, you can use a coaxial T
Alternatively, there may already be a coaxial cable that is connected to
service and that has an open end for
connecting to the cable modem.
Plug the power cube into an outlet and then into the modem’s POWER jack. It may take
several minutes for the modem to register with the cable system. If the modem’s front
panel STATUS, US, and DS lights do not stay on steady after a reasonable amount
time, go to Troubleshooting.
You should follow any directions (including in structions for any software installation)
that your cable provider has given to you. Your cable company may instruct you to tell
them your cable modem’s MAC address after you complete the hardware installation.
Now that you have installed your Zoom cabl e mod em and it has synchronized itself with
the cable network, your cable modem can c
onnect you to the Intern et. Open your
browser and go to a familiar Web site to
check that the cable modem is w orking.
Installation is complete.
How to con
nect your cable modem to a router (not a compute r)
The router should not be plugged in or powered u p. If it is, unplug it.
Plug one end of the Ethernet cable into the modem’s ETH jack and the other end into
the router’s WAN Ethernet jack, typically labelled WAN or Internet.
Connect the modem to the cable outlet.
If you have a wall outle t cable jack: Connect one end of the coa xial cable to the
CA BLE connector and connect the other end to the wall jack.
If you do not have a w all jack: You should have coaxial cable entering your
house close to where you want to locate
your cable modem. Connect the end of
this cable to the modem’s
CA BLE connector.
Please note the follow
RN ING : Risk of electric shock. Do not expose to water or moisture.
• You can position the cable modem horizontally
or vertically. The vertical position benefits
from the modem stand.
The Broadband Residential Cable Modem is a high-performance c ommunications
device designed for home and office environments.
• Do not block the modem vents in any way.
Do NOT use the cable modem outdoors. Keep the cable modem in an
environment that is between 0°C and 40°C (betwe
en 32°F and 104°F).
• Do not place the modem near a heating or ai
r co nditioning duct, in direct sunlight, or
anywhere susceptible to drastic temperature changes.
To avoid overheating the cable modem, do NOT place any object on top of the
Your Zoom cable modem has several lights on its front panel to help you monitor the
Do not restrict the flow of air around the cable modem.
The manufacturer assumes no liabilities for damage caused by any improper use
of the cable modem.
Solid Power is on.
Zoom Telephonics, Inc. (hereinafte
r “Zoom”) assumes no liabilities with respe ct to the contents of this
document. Zoom also
reserves th e rig ht to revise this document or up date occasionally the content
hereof without any obligatio
n to notify any person of su ch revisions or amend ments. Specifications subje ct
to change withou
Modem is establishing a
connection fro m the Internet to the
Connection from the comp uter to the Interne t is established.
Modem is establishing a
connection from the computer to the
Connection from the comp uter to the Interne t is established.
This device complies w
ith part 15 of th e FCC rules. Operation is subject to the following tw o conditions:
(1) This device may not cau
se harmful interference and,
(2) This device must a
ccept any interfe rence receiv ed, including inter ference that may cause undesired
Modem is establishing a co nnection to the cabl e provider.
This product is UL-Listed and complie
s with all ap plicable electrical and fi re safety requirements.
Modem connection to the cable provider is establi shed.
Data is flowing be tween the computer and the Internet.
Zoom Telephonics, Inc. (hereina
fter “Zoom”) warrants this product agai nst defects in material and
workmanship for a
warranty period of 2 y ears. This wa rranty applies to the original end-user pur chaser.
Powered-up modem is connected
to LAN device (e .g. computer,
For all Zoom products other
than software, Zoom will, solely at its option, repa ir or replace this pr oduct
with a functionally equiv
alent new or fa ctory-reconditioned product during the warranty period. Th e
consumer will deliver the p
roduct to Zoom. All tran spor tation risks and costs i n connection w ith this
ice are the respon sibility of the consumer.
I cannot access my Internet ser vice or send or recei ve email.
All the modem’s front panel lights— LINK , STA TUS , US (upstream), DS
nstrea m), and POWER —must be solidly lit before your modem will let
you connect to the Internet. If they are not:
Zoom will replace softw
are at no charg e if there is a de fect in materials or w orkmanship for a period o f 30
days from date o
f original retail purcha se, provided the defective softw are is returned to Zoom. Shipments
from Zoom will normally
be via U.S. Mail. Software produ cts supplied by Zoom are sold “as is,” without
warranty, either expressed
or implied, as to function, ap plication, merchantabi lity, performance, a nd
Check all modem connections (power , Ethernet, and cable modem line).
Unplug your cable modem and then plug it back in.
Restart your computer.
Check to see that your cable TV is working.
Check with your cable service prov ider to make sure that high speed
access is available and running.
Zoom is not responsible
for incidental or consequen tial da mages, and is not responsible for damages
resulting from the b
reach of any expresse d or implied w arranty. Zoom is not respon sible for any costs o f
recovering, reprogramming, o
r reproducing any program s or data stored or used with the Zoom products,
damage to property, and to the extent permitt
ed by law, damages for per sonal injury.
In rare instances, the cable signal may be weak or noisy. If this is the
case, call your cable service provider.
If you are using your PC’s Ether net port, check that this port is
functioning correctly. If you are using wireless, check that your wireless
connection is functioning correctly. Refer to its documentation if
This warranty is in
lieu of all other w arranties, expr essed or implied. We do not as sume or authorize
assumption for us o
f any other warranty expressed or implied. Some states and countries do no t allow the
exclusion or limitati
on of incidental or consequen tial damages, so the above limitatio n or exclusions may
not apply to you.
Check that your Web browser is configured correctly. It should be set to
use a network connection (this might
be called a Local Area Network or
This warranty does
not apply if the Zoo m product has bee n damaged by accident, abu se, lightning or
other natural disasters, misuse or
misapplication, o r if it ha s been modified w ithout the written permission
of Zoom, or if any
serial number has been remov ed or defaced.
Check that y our computer’s network settings are configured correctly. A
Windows computer should have a lo
cal area connection that should
normally be Internet Protocol version 4,
Internet Protocol version 6, or
TCP/IP; not AOL, Dial-up, or Adapter. A Macintosh computer should be
configured for Built-in Ethernet, an
d TCP/IP should be set to Using
This warranty shal
l not be applicable to the extent that any provisions of this warranty are prohibited by
any federal, state
, or municipal law th at cannot be preempted . This warranty giv es you specific legal
rights, and you may also have other
rights that va ry from state to state or co untry to coun try.