[ANSS-netops] Cell modem?

[Mark E. Meremonte]

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 
><<mailto:crotwell at seis.sc.edu>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 
><<mailto:given at caltech.edu>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 | 
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>
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>
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>
>+-----------------------------------------------------------------+
>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?
>>
>>
>>
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*********************************************************
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
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