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Philip,<br><br>
I don't think I have much to add. We don't see a pattern in drop
outs, and certainly don't have to recycle power on our modems very
often. I know your pain and concern, however, as we also hate it
when a costly maintenance trip is only to recycle the modem or
RT130. Note that we still only have Verizon modems at this point,
and only a handful.<br><br>
I do have to say that we have varying degrees of success with cell modems
so far. Some seem solid and others experience more drop outs.
We've compared RSSI and EC/IO numbers (thanks to someone at Feeney and
Mark Meremonte) and don't see much correlation, including the fact that
the one site that probably has the lowest RSSI also has the most complete
data. I would love to be able to plot traffic at a particular cell
site versus data drop outs. In other words, cell modems are still
generally qualify as a last resort for our data telemetry needs.<br><br>
Sorry I couldn't be more help.<br><br>
Dave<br><br>
At 09:36 AM 12/2/2011, Support wrote:<br>
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No, The modems don’t require a daily resetting of the
devices. An occasional power-cycling of the modem wouldn’t hurt but
should not be required. If you are having occasional issues
with the strength of the signal (RSSI – Receive Signal Strength Indicator
being low (higher negative value)), then we would need to determine what
the issue is one a case-by-case basis. You also want to watch the
EC/IO (a measure of energy (interference)) as well. A directional
antenna should provide a better signal. Whether the device has to
be reset depends on its recovery once the connection has been
re-established. <br>
<br>
One other thing to watch is the modem and device firmware. Make
sure it is kept current. This also helps. <br>
<br>
<b>Thanks,<br>
<br>
Roger K. Parker</b><br>
Engineering Technician<br>
<i><a href="mailto:rparker@feeneywireless.com">
rparker@feeneywireless.com</a></i><br>
Feeney Wireless, LLC - 4085 W. 11th Ave. Unit #3, Eugene, Oregon
97402<br>
(Free) 800-683-4818
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(P) 541-685-9045 x227
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(F) 541-284-0030<br>
<i><a href="http://www.feeneywireless.com/">www.feeneywireless.com</a></i>
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<b>From:</b> Mark E. Meremonte
[<a href="mailto:meremonte@usgs.gov" eudora="autourl">
mailto:meremonte@usgs.gov</a>] <br>
<b>Sent:</b> Friday, December 02, 2011 8:59 AM<br>
<b>To:</b> Philip Crotwell; anss-netops@geohazards.usgs.gov<br>
<b>Subject:</b> Re: [ANSS-netops] cell modems and first of the month<br>
<br>
HI Phillip,<br><br>
Is it a requirement to daily power cycle a Raven-X, XT, XE if using
Verizon service? I have numerous Cell modems across the
country now and have never power cycled them. However, I do
have a couple that had weak to nill signal strength from time to time;
and 2 which the RT130 would not renegotiate to the Internet. Thus
the RT130 had to be physically power cycled after I installed a
directional antenna vs an Omni to obtain a more robust signal from one
cell tower instead of 2 or more which the Omni appeared to be jumping
around.<br><br>
Mark<br><br>
<br>
At 07:54 12/2/2011, Philip Crotwell wrote:<br><br>
Hi all<br><br>
We use raven-x cell modems on both verizon and at&t and have
noticed<br>
that often a large percentage of the stations will go offline
shortly<br>
after midnight on the first of the month. Not always, and not
exactly<br>
at midnight, but usually between midnight and 2am. Usually the<br>
stations come back after our daily cell modem power cycle. It seems
to<br>
happen more often with Verizon, but has also happened with AT&T.
Tech<br>
support is as usual completely useless as they suggest "turn off
the<br>
power and turn it back on again" and seem very surprised when I
tell<br>
them I can't.<br><br>
Has anyone else seen this odd behavior? Any words of advice?<br><br>
thanks,<br>
Philip<br>
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U.S. Geological Survey: Geologic Hazards Science Center<br>
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