[ANSS-netops] Cell modem?

[Croker, David]

Hi Jim,

The NCSN has a few RT-130's with 6 channels at 100sps deployed with Raven
modems.  Using CO compression, we average 2-2.2 GB/mo, so plenty of
headroom within the "5GB" plan.  This is on Verizon.

Good luck,
Dave

On Fri, Feb 8, 2013 at 2:29 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 or doug 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?****
>>
>>
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-- 
USGS - Earthquake Science Center - NCSN Field Operations Manager
David S. Croker                                                  office
(650) 329-4697
345 Middlefield Rd, MS 977                                    fax (650)
329-4732
Menlo Park, CA 94025                                          cell (650)
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email: croker at usgs.gov
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