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Phone What should I do if I have no dial tone?
Determine whether the problem is inside your home or in the wiring outside your home. Try disconnecting each telephone set and related equipment (answering machine, modem, fax machines, satellite TV set-top box, cordless phones, and security systems) one at a time from the telephone jack.
Start the process of elimination with equipment that is also plugged into an electrical outlet. Since there is a greater probability of problems associated with equipment that is also plugged into an electrical outlet, leave this device unplugged from the telephone jack.
Check for dial tone on another set that is still plugged in. If possible, use a telephone that is not cordless or does not require connection to an electrical outlet.
If you hear a dial tone, your service is restored. The last set you unplugged is most likely the source of the problem and should be disconnected from the line until it is repaired or replaced.
If you do not hear a dial tone there’s a good possibility the service problem is associated with SKT outside wiring or equipment.