ZyXEL P-660HW-T1 V3 Router Loses Connection Seemingly At Random?

Jan 17, 2012

Several times a day our router will lose its connection to the internet (the internet light goes off, while the wireless signal stays on). All the computers in the house lose connection to the network while this happens. It will usually happen two or more times right after each other, so the computers can re-connect for a few seconds and then the connection will drop again. Eventually, after this repeats a few times, everything returns to normal.We've tried swapping cables, microfilters and 3 different routers (though all the same model). We tried the test socket, but the same problem happens. An engineer came to test the line but said he couldn't detect any problems. We have good download/upload speeds while the router stays connected and no noise on the phone line. I'm fed up of going in circles with the ISP tech support so I came here instead...One other thing I tried was OpenDNS, but that made no difference either...

Info: The router is a ZyXEL P-660HW-T1 v3... I've tried updating the firmware on it, but it wouldn't let me... If I remember correctly the Router Configuration Interface told me I don't have permission to do that.There are four computers connected.. mine is Windows 7, I'm pretty sure 2 others are as well, and also a Macbook... There's also various stuff like an Ipad, Kindle etc., which all lose connection at the same time.

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Jul 17, 2002

Network was:

AT&T Broadband ISP
LanCity LC-PET3 cable modem (non DOCSIS)
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Router is configured to be a DHCP server (default configuration).
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Windows IP Configuration

Host Name . . . . . . . . . . . . : VAIO-PC

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P.S.
Xirrus pictures =

1. taken from the back of the house (not connected to the network) where the laptop is used a majority of the time. Although the strength isn't the best, there didn't seem to be any problems in the two weeks prior to this.

2. taken from the same room as the modem and router, connected to the network, but with "limited/no connectivity"

Command Prompt:

Microsoft Windows [Version 6.0.6002]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.

C:Windowssystem32>ipconfig/all[code].....

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[code]....

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