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NBX V3000 Flashing Red Lights - What does this mean

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Last Modified: 2016-09-22
We have an older 3Com NBX V3000 Analog phone system and today, we've been having some issues where the user inside the office can hear the caller just fine, but the caller outside the office is unable to hear due to static and/or choppiness.  I noticed that the 3Com V3000 had a flashing red line next to the Ethernet port (see picture)Picture of NBX V3000 with red ethernet lights.

Any help would be appreciated.  If it helps, we have some old 30 networking switches that need to be replaced as well.
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