Panasonic UF-585/595 - Manual (Page 152)

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Checking the Telephone Line
When you do not hear a dial tone through the telephone connected to the machine or when the telephone does
not ring (No automatic receive).
1 Unplug the Telephone Line Cable from the
telephone jack that was supplied by the
telephone company.
2 Plug a different regular telephone into the
same telephone jack.
3 Check for dial tone through the handset. If
there is still no dial tone, report it to your local
telephone company.
or
Call from another telephone to this number. If
the telephone does not ring, report it to your
local telephone company.
Troubleshooting