[ANSS-netops] Cell modem?

[Philip Crotwell]

We are mostly just using the omni antennas that came with the ravenX. We
have tried directional antennas (yagi) at a couple of sites, but it has not
been an obvious improvement. Could be we were doing something wrong, but
the rssi never seemed to be that much better than the omnidirectional no
matter where we pointed it.

I don't know that much about the details to be honest. We install them,
turn them on, and except for a weird "first of the month" outage that
happens almost every month, the seem to just work. We do have a "prc1000"
at the sites to power cycle them once a day. That seemed to help uptime a
lot.

Philip


On Fri, Feb 8, 2013 at 5:36 PM, Mark E. Meremonte <meremonte at usgs.gov>wrote:

>  HI Phillip;
>
> Question: are you using dual band Omni and/or directional antennas with
> freq capabilities up to 1900-2400MHz to achieve those high rates over cell?
>
> Mark
>
>
> At 03:32 PM 2/8/2013, Philip Crotwell wrote:
>
> Just to be clear, CO -> steim1 and C2 -> steim2.
>
> Why they choose CO/C2 instead of C1/C2 will have to remain a mystery!
> :)
> Philip
>
>
> On Fri, Feb 8, 2013 at 5:29 PM, Philip Crotwell <crotwell at seis.sc.edu>
> wrote:
>
> We have been doing 3 x 100sps from refteks over cell modems with no data
> volume problems and accidentally had 6 x 100 sps at one station for a
> while. It came in fine with no "over the gigabyte limit" issues. I think we
> have 5Gb/month caps as well, on verizon and AT&T.
>
> Using compression on the refteks helps alot, so use either CO or C2, but
> be aware that C2 for a very quiet station can pack more samples into a
> reftek packet than will fit into a tracebuf, resulting in the tracebuf
> being booted out of the system. For most normal stations this shouldn't be
> an issue, and in the cases where it is you can use CO or can set the gain
> to x32, or both.
>
> Philip
>
>
> On Fri, Feb 8, 2013 at 5:19 PM, Doug Given <given at caltech.edu> wrote:
>
>     Our real-world numbers from 6-channel Q330s (Steim 2 compression) show
> volumes of about 3.2Gb/mo or less. We have exceeded the 5Gb/mo limit when
> there is some pathology at the station that causes lots of resends. So far
> our carrier, Verizon, has not dinged us for any overages.
>
> +-----------------------------------------------------------------+
> | Douglas
> Given
> | Project
> Chief
> |
> | U.S. Geological Survey    | S. California Earthquake
> Monitoring |
> | Caltech Seismological Lab |(626)583-7812  FAX:(626)583-7827   |
> | 525 So. Wilson Ave.       |given at caltech.edu ordoug at usgs.gov  |
> | Pasadena, CA  91106       |http://earthquake.usgs.gov
>           |
>
> +-----------------------------------------------------------------+
>
>  On 2/8/2013 1:53 PM, James H Bollwerk (jbollwrk) wrote:
>
>
> Just getting into the cell modem game and need help.
>
> We’ll be Streaming 6 x100 sps from a RT130-01/6 with a Raven XE (ATT
> provider).
>
> Our university plan will allow 5GB per billing cycle.  With compression
> that should work.
>
> Does anyone have real world data usage numbers?
>
>
>
> _______________________________________________
> ANSS-netops mailing list
>
> ANSS-netops at geohazards.usgs.gov
>
> https://geohazards.usgs.gov/mailman/listinfo/anss-netops
>
>
>
> _______________________________________________
> ANSS-netops mailing list
>  ANSS-netops at geohazards.usgs.gov
>  https://geohazards.usgs.gov/mailman/listinfo/anss-netops
>
>
>
> _______________________________________________
> ANSS-netops mailing list
> ANSS-netops at geohazards.usgs.gov
>  https://geohazards.usgs.gov/mailman/listinfo/anss-netops **
>
> **
>  *********************************************************
> Mark E. Meremonte         Geophysicist    Eq_Effects/NEIC
>
> U.S. Geological Survey:  Geologic Hazards Science Center
>  Denver Federal Center         Work: 303-273-8670   Cell: 303-478-5766
> MS 966, Box 25046                 Email: meremonte at usgs.gov
> Denver, CO  80225                  Web: http://geohazards.usgs.gov
>
> Ship:  U.S. Geological Survey, 1711 Illinois St., Golden, CO 80401
> **********************************************************
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://geohazards.usgs.gov/pipermail/anss-netops/attachments/20130208/9929d573/attachment.html>