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Tone/Pulse Dialing. If your phone system uses pulse dialing rather than tone dialing, change the
setting to pulse here. (Most phone systems are tone.)
Availability Detection. When Availability Detection is on, the DVR checks whether the phone
line is in use which allows it to avoid disrupting a call in progress.
This setting is off by default. With Availability Detection turned off, if you have another
modem call in progress (on your computer or other device), that call may be disrupted if the
DVR attempts to call the TiVo service. If you have a standard dial tone, and Availability
Detection is off, make sure Dial Tone Detection is on.
Dial Tone Detection. This setting is on by default. If you leave it on, the DVR will check for a
dial tone before it starts dialing. However, if you have a non-standard dial tone, or a stuttering
dial tone (as some voice messaging systems have), the DVR will be unable to detect the dial
tone and will not make its call.
If you are experiencing “Failed, Line
unavailable” errors, or if the DVR is
not making phone connections, you may
have a low-voltage phone system that the
DVR cannot detect. In this case, it’s best to
have Availability Detection off.
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With Dial Tone Detection and
Availability Detection both turned
off, if you happen to be talking on the
phone when the DVR tries to connect you
will hear the its modem dial.