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Troubleshooting

If you have a data or telephony problem, try these tips before calling your cable
operator for assistance.

Touchstone™ 

Telephony Modem

Quick Start Guide Model 402P & 402Q

Prior to installation, ensure that the battery(ies) have been installed per the Ini-
tial Battery Installation Guide and the mounting orientation has been decided. 

Problem

Possible Fixes

Data and telephone ser-

vices are out

Check power connections.

Check cable connections (is the TV working?).

• If yes, press the reset button, if no, contact the MSO

Data service is not working 

using the USB port (Win-

dows ME, Windows 2000, 

and Windows XP), tele-

phones work

Check the USB cable connections. Disconnect and reconnect the USB 

cable from the Telephony Modem and computer.

If you are using a powered USB hub, ensure the hub is turned on.

Did you load the USB drivers? If not, load the drivers. 

Press  the 

Standby

 button on the front of the Telephony Modem until 

the 

DS, US 

and 

Online

 LEDs are all on.

Reboot the Computer.

Press  the 

Reset

 button on the back of the Telephony Modem.

Data service is not working 

using the USB port (Win-

dows 98SE), telephones 

work

Attempt recovery action listed above. 

Reinstall USB drivers by following these steps:

•Disconnect the USB cable between the Computer and the Telephony 

Modem.

•Use the ARRIS Uninstall utility (remove.exe on the ARRIS driver CD) 

to remove the improperly-installed driver.

•Reboot the Computer.
•Reinstall the USB drivers.

Data service is out 

(Ethernet), telephones 

work

Press  the 

Standby

 button on the front of the Telephony Modem until 

the 

DS, US

 and 

Online

 LEDs are all on.

If  the 

Link

 LED is off:

Check  the 

Link

 LEDs at the Telephony Modem and the connected 

PC or hub.

If you are using a hub, is the hub turned on?

Are you using the right Ethernet cable? Use a straight cable for 

direct connection to a PC or cross-over cable for connection to a 

hub.

Press  the 

Reset

 button on the back of the Telephony Modem.

Telephone service is out, 

data works

Is  the 

Telephone

 LED for the line lit? If not, contact your cable 

operator for assistance.

Make sure all phones on the line are hung up properly.

On remote and powered phones, check power and battery status.

Check the telephone cables to ensure they are connected tightly and 

the cables are not cracked or broken.

If a “fast busy” is heard, contact the contact the cable operator for 

assistance.

USB

Ethernet

Note

: Always

connect RF before
connecting power.

Note

: AC  

power must be 
connected for bat-
tery to charge

OR

Computer

Computer

1

2

3

4

Touchstone™ Telephony Modem

Quick Start Guide Model 402P & 402Q

© 2002-2004 ARRIS. All rights reserved.
All information contained in this document is subject to change without notice.
ARRIS reserves the right to make changes to equipment design or program com-
ponents, as progress in engineering, manufacturing methods, or other circum-
stances may warrant.
Touchstone is a trademark of ARRIS Licensing Company. All other trademarks
are the property of their respective holders.
Document number: ARSVD00734
Release 4 Standard 2.0
April 2004

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