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I have the same problem. The Sync DSL light keeps on flashing. According to the 3Com and Singtel, they both blame one another. From my understanding, the modem is not receiving and internet signal at all. Can anybody help. I have tried everything. Change to a better filter and cable , still no internet. Thks.

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Yes, when the sync light flashes it meand there is no sync to the DSLAM located at the exchange. This is usually down to either bad wiring (too much line noise) or the provider not having set the line up.

Have you tried connecting the router to the master socket in the house with no other equipment connected - phones faxes modems etc? they can cause problems sometimes.

Posted on Jul 07, 2009

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Posted on Jan 02, 2017

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My 3com router starts and every a 30 second unpluged and and pluged again. and dont sync. when i go with 192.168.1.1 sometime giv me the firmware page boot or runtime. and sometime giv me the router...


Hi,
Try resetting the router through the reset pin hole at the back. Press and hold it for 15-20 seconds or until all the lights turns off then back on (not more than 30 seconds).
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If your computer is able to go online through the modem, that means the modem is working fine.
You will need to connect the computer to the router and the modem to the router.
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That 3Com really doesn't have a wahy of setting up a VPN.
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Not-sync'd = No dsl signal.
First thing first- Unplug your modem for 10 seconds or so. Then see if your lights all come back on.

If you have phone service with your dsl, make sure you have dial tone in the phone jack you're trying to use. If not, then try a different phone jack. If you still can't get your dsl to work, then call the phone company and have them come out and fix your dsl.

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