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The CBR400 sends log messages to the syslog on "flux". The 4G modem is known as "WAN:9d7c85c4". The logs show "carrier reject"., and that it reverts back to 1XRTT (2G):

Code Block
languagenone
fgrep CBR /var/log/messages | fgrep 5c4

May 28 16:45:12 cbr400.isfs.ucar.edu (CBR400-afa) WAN:9d7c85c4: Connection Change : None -> EVDO, %
May 28 16:45:12 cbr400.isfs.ucar.edu (CBR400-afa) WAN:9d7c85c4: Connect Event: carrier reject
May 28 16:45:12 cbr400.isfs.ucar.edu (CBR400-afa) WAN:9d7c85c4.CPPM: state=connecting  result=carrier reject
May 28 16:45:19 cbr400.isfs.ucar.edu (CBR400-afa) WAN:9d7c85c4: Connect Event: carrier reject
May 28 16:45:19 cbr400.isfs.ucar.edu (CBR400-afa) WAN:9d7c85c4.CPPM: state=connecting  result=carrier reject
May 28 16:45:44 cbr400.isfs.ucar.edu (CBR400-afa) WAN:9d7c85c4: Connection Change : EVDO -> 1XRTT, %

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state

download

upload

latency

3G connected, 4G disabled

413,444

380,309

121,107

4G connected (1xRTT), 3G disabled

58

127

485

Until we can get the 4G modem to do better than 1xRTT, we'll use the 3G and disable the 4G.

Here is the display of Status -> Internet Connections -> "Modem: Novatel Wireless CDMA":So the 3G is working better than the 4G currently.