<div class="gmail_quote">On Thu, Jul 21, 2011 at 7:13 PM, Mike Diehl <span dir="ltr"><<a href="mailto:mdiehl@diehlnet.com">mdiehl@diehlnet.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Hi all,<br>
<br>
I've got a strange problem with a customer's phones.<br>
<br>
They've got a bunch of Grandstreams that seem to be rock solid... until<br>
7:00pm. At 7:00, some of the phones become unavailable, and stay down. Call<br>
quality is solid almost all the time. But right at 7:00, things go bad. Only<br>
some of the phone lines go down and they stay down until the phone is<br>
rebooted.<br>
<br>
I'm not even sure what to look for when I go to the site. Any ideas?<br><br></blockquote><div><br></div><div>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. </div>
<div><br></div><div>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.</div><div><br></div><div>-M</div>
</div>