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I’m not getting on the Internet. (Ethernet)
If you are using a hub, is the hub turned on?
Are you using the right type of
Ethernet
cable? Use a straight-through cable
for direct connection to a computer; use a cross-over cable for connection
to a hub without a cross-over switch.
Press the
Reset
button on the back of the Telephony Gateway.
A misconfiguration could lock out all access to the Telephony Gateway router.
If you think this has happened, see
Resetting the Router to Factory Defaults
.
I’m not getting on the Internet. (Wireless)
Check the indicator lights (see
Using the Telephony Gateway
) — the WiFi
light should be on.
Does your connection utility discover your wireless LAN? If you turned off
“Broadcast SSID” you need to manually enter the name of your wireless LAN
in the connection utility.
Change your security mode to “disabled”. Enable one of the other security
modes as soon as you find the problem.
A misconfiguration could lock out all access to the Telephony Gateway router.
If you think this has happened, see
Resetting the Router to Factory Defaults
.
My wireless Internet connection stops working sometimes.
This is usually caused by interference — two common sources are 2.4GHz
“remote” telephones and microwave ovens. If you cannot remove the inter-
fering product, try using a different channel or setting Protected Mode.
I can get on the Internet, but everything is slow.
If the Web site you are visiting is very popular, that site may be having trou-
ble servicing all the requests. If other sites download quickly, wait for a few
minutes and try again. Usage during peak hours may also affect the con nec-
tion speed.
Other communications on the LAN, or interference with wireless connec-
tions, may slow down your connection.
Xfinity TG1682 Telephony Gateway User’s Guide
Safety
Getting
Started
Battery
Installation
Installation
Ethernet
Configuration
Usage
Troubleshooting
Glossary
36
Page 37 / 44
I don’t have dial tone when I pick up my phone, why?
In order for telephone service to be functional on the Telephony Gateway,
telephone service must have been purchased from the service provider and
configured on your Telephony Gateway. The following steps should help in
identifying the source of the problem.
1
Is the Power LED lit?
•
If not, check to make sure the Telephony Gateway is plugged in
and the outlet has power.
•
If the LED is lit, go to the next step.
2
Is the Online LED lit?
•
If not, check the coax connection at the Telephony Gateway and
the wall. Ensure they are connected and tight. If they are and
you do not have dial tone, contact your service provider.
•
If the Online LED is lit, go to the next step.
3
Is the Telephone (Tel 1 or Tel 2) LED lit?
•
If not, phone service has not been set up on that line. Contact
your service provider.
•
If it is blinking, there is a phone off hook somewhere in the
house. Find that phone and hang it up.
•
If it is lit, go to the next step.
4
Is the phone plugged directly into the Telephony Gateway?
•
Make sure the phone is plugged into the port on the back of the
Telephony Gateway labeled “Tel 1” for line 1, and “Alarm/Tel 2” for
line 2.
•
If so, try a different phone. Make sure the new phone is a work-
ing phone.
•
If a known good phone is used and you still don’t have dial tone,
try a different phone cable. If a new phone and cable do not re-
store dial tone, call your service provider.
Xfinity TG1682 Telephony Gateway User’s Guide
Safety
Getting
Started
Battery
Installation
Installation
Ethernet
Configuration
Usage
Troubleshooting
Glossary
37
Page 38 / 44
5
Is the Telephony Gateway plugged into a wall outlet?
•
If so, unplug the RJ-11 connector at the back of the Telephony
Gateway and plug in a known working phone. If you now have
dial tone, the problem is with the house wiring. Contact your
cable company or a qualified wiring technician to correct the
house wiring. If you still do not have dial tone, contact your serv-
ice provider.
Xfinity TG1682 Telephony Gateway User’s Guide
Safety
Getting
Started
Battery
Installation
Installation
Ethernet
Configuration
Usage
Troubleshooting
Glossary
38
Page 39 / 44
Glossary
The following is a list of common cable and networking terms.
Amp-hour (Ah)
A measure of battery capacity. For example, a 1.0Ah battery can nominally
supply one Ampere of current for one hour.
Category 5e (Cat5e)
A high-quality type of cable, used for gigabit Ethernet (1000BaseT) connec-
tions. When purchasing Ethernet cables, always look for Category 5e cable.
Coaxial cable (coax)
A thin wire, used to connect your television and Telephony Gateway to the
cable TV system. You can buy coax from any electronics retailer and many
discount stores.
CPE
Customer Premise Equipment. This is the equipment that is plugged in to the
Telephony Gateway; typically a computer or hub.
Cross-over
An Ethernet cable used to connect two hubs (or a hub and a cable modem)
together. Also, some Ethernet hubs may have built-in cross-over on one or
more ports (which eliminates the need for a cross-over cable).
DHCP
Dynamic Host Configuration Protocol. An IP protocol used to provide an IP
address and location of services (such as DNS and TFTP) needed by a de-
vice connecting to the network. DHCP allows the cable company to con figure
your computer’s networking software for you.
DNS
Domain Name Service (Server). An IP service that associates a domain
name (such as www.example.com) with an IP address.
Xfinity TG1682 Telephony Gateway User’s Guide
Safety
Getting
Started
Battery
Installation
Installation
Ethernet
Configuration
Usage
Troubleshooting
Glossary
39
Page 40 / 44
Downstream
In an HFC network, the direction from the head-end to the subscriber. Some
older cable documentation may refer to this as the forward path.
DOCSIS
Data Over Cable System Interface Specification. The interoperability stan-
dards used for data communications equipment on an HFC network.
EMTA
Embedded Multimedia Terminal Adapter. An MTA device that is integrated
with a cable modem.
Ethernet
A standard method of connecting two or more computers into a Local Area
Network (LAN).
EuroDOCSIS
The European version of DOCSIS.
Event
An informational message used for monitoring network status.
F-connector
The type of connector used on coax cable. There are two common types of
F-connector, slip-on and screw-on. Use coax with screw-on connectors for
connecting your Telephony Gateway.
Firewall
A hardware or software device that prevents unauthorized access to a pri-
vate network from the Internet. The TG1682 provides a built-in firewall.
Gateway
The device, usually a router, that connects devices on a given IP subnet to
other IP subnets.
Xfinity TG1682 Telephony Gateway User’s Guide
Safety
Getting
Started
Battery
Installation
Installation
Ethernet
Configuration
Usage
Troubleshooting
Glossary
40

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