Cisco DPC2420 User Manual page 129

There is no dial tone when I lift the handset
Try the following solutions if you cannot hear a dial tone:
Your telephone wiring may be connected to the wrong RJ-11 port on the

residential gateway. The residential gateway has two telephone ports. Verify that
you are connected to the correct telephone port.
There may be a problem with your telephone set. Use a different telephone set

and listen to hear dial tone.
There may be a problem with your home telephone wiring. Use a telephone and

connect directly to the same RJ-11 port on the back of the unit. If the dial tone is
working here but does not work at other locations in the home, a professional
may need to diagnose and repair a problem with your telephone wiring.
Verify that the telephone company has removed the previous telephone service
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from your home telephone wiring.
Your telephone service may not be enabled from your cable telephony service

provider. Contact your cable telephony service provider for more information.
4021194 Rev A
Common Troubleshooting Issues
109