On Thu, Jul 21, 2011 at 7:13 PM, Mike Diehl <mdi...@diehlnet.com> wrote:
> Hi all, > > I've got a strange problem with a customer's phones. > > They've got a bunch of Grandstreams that seem to be rock solid... until > 7:00pm. At 7:00, some of the phones become unavailable, and stay down. > Call > quality is solid almost all the time. But right at 7:00, things go bad. > Only > some of the phone lines go down and they stay down until the phone is > rebooted. > > I'm not even sure what to look for when I go to the site. Any ideas? > > Many years ago, in my college days, the network in one building would fail around a certain time every day. The sun would hit the network closet around the same time every day in the summer, causing the equipment to overheat and temporarily fail. I would go there and observe everything which happens at 7:00. Maybe it's something that a cleaning service inadvertently does, like faulty wiring + a vacuum cleaner. -M
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