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cable modem instalation

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by chant

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Ihave a cable modem connected to an 8 port ethernet switch. 4 computers are connected to this switch and are working perfectly. I'll try to connect a new cable modem to the same cable line just to only one computer and it is always reject the internet connection telling me and error. My question is can I use a different cable modem to the same line or I have to call the cable company for the ew modem ? Are the IP address change or the DNS are different? Why the cable modem that the company sold me works and the one I bought no?

4 replies

by tech_wiz03

firstly check with you isp provider and see if they can give you the gateway/dns/dhcp settings or the new modem won't probably work. I know with adsl modem , I have to use two different NIC settings depending on which pc i have modem on or my pc isn't recognized by my host isp.

hope this helps
rick

by timwalsh

Almost all ISPs register a cable modem's MAC address to determine authorized users. Therefore, if you just stick any modem on the cable, it won't be recognized, and a connection will be denied.

Some ISPs will let you use a personally-purchased modem. Other ISPs will only allow a modem that they provide. As suggested in Answer 1, call your ISP and ask them.

by nemanya.pavlovic

This problem is caused by the MAC address of your new modem not being in your provider's database. When I first got my cable modem working I had purchased one ahead of time and had it ready for the cable company. When they came to sell me on the idea of a cable modem, I told them I already had one, and they wrote the MAC address of the modem I bought so that it could be added to their list. Ofcourse it was the same type and brand name as the modem they were going to sell me.

by richard.sharkey

Also have a look at MAC address spoofing for the cable modem you have bought. This allows your cable modem to pretend that it has the MAC address that the cable co are expecting.]

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