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I have a Zyxel P-660HN-T1A modem, which connects to my ISP.

I have an 8-port ethernet switch connected to it and other laptops connect via Wireless.

As soon as upto 7 laptops connect to the modem, the Zyxel doesn't let any other device connect.

If I try from my phone [HTC HD7, works fine otherwise], I get the error: Could not reach network!

I am at a loss, what is the issue and how do I resolve it.

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3 Answers 3

Reset to default
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My ISP's zyxel had a 5 DHCP lease limit (non-expiring leases). We never have more than 5 devices around at any moment, but many visitors each day, so we had to reboot it every morning to allow new machines to connect. I reconfigured the zyxel to 50 DHCP leases max. No problems after that (I google for my ISP's password).

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It could be a hard limitation of the firmware. Your best bet is:

1) Call your ISP and bite their head off

or

2) Turn the routing on your modem off, and get a proper router behind it.

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  • Will applying some other firmware onto it work? Will try (1) as well. And getting a proper router will cost me, which I am trying to avoid. :P
    – manishKungwani
    May 3, 2012 at 20:14
  • @manishkungwani you will probably be hard pressed to find 3rd party firmware for such an obscure device. Getting a proper router for yourself may initially be more than you're willing to part with, but you can see benefits from it. Such as getting an actual gigabit switch built-in (this games a big difference over 10/100). It also is yuor property, so if you switch ISP's then you keep it. You also get full control over the device.
    – BloodyIron
    May 3, 2012 at 20:46
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Change the pool size to a higher one (highest value is 254).

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