I had an old modem+router (Arris SB6580) and speeds were 30-40mbps down and 2-3mbps up. This caused lots of stuttering on conf calls (for both audio and video). A neighbor down the street using an xfinity modem/gateway is consistently seeing 120mbps down and 6mpbs up.
I bought and installed a new Motorola MB7621 (24x8) modem, but speeds are still about the same. only 4 of possible 8 channels show as bonded for upstream.
Attached is the connection status. Any ideas on what could be the issue?
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3 or 4 upstream channels are all that Comcast currently provides.