On Wednesday, August 24, 2016 at 10:09:15 AM UTC-7, JW wrote:
As the Subject says: I have a Linksys WRT54GS v.2 wireless router which
occasionally drops to 1.0 Mbps and stays there. Signal strength still
shows excellent. Can't even ping the router via a wireless connection when
it happens.

The channels available for WiFi are all unlicensed; if there's a strong second
WiFi user (or other device in the 2.4 GHz band) its broadcast could swamp
yours, except for pauses between transfers.

Signal strength might be excellent, but the road is crowded.