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Level 1: Cadet

Replace Netgear CG3100 with New Telstra Smart Modem

I have an old Netgear CG3100 modem on Telstra Cable - I have a large house, the cable enters the house in the study which is no where near where we use our wifi devices. We are unable to use multiple devices without the connection being too slow/ dropping out. The kids arguing over the internet because only one at a time can use it. I have tried a WiFi extender and this doesn't work. 

Will purchasing a new Telstra Smart Modem with cable adapter solve this problem. Or are there other alternatives I should look at. The guy at JB suggested a Telstra modem with another providers router? I have no idea what is the best option.

Thanks in advance.

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7 REPLIES 7
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Level 23: Superhero
Level 23: Superhero

Re: Replace Netgear CG3100 with New Telstra Smart Modem

So the new Smart Modem, will have better range than the CG3100D but I cant say if it will resolve the issue. Having the cable adapter will allow you plug in any router you'd like essentially. Personally you may want to have a look at the Netgear Orbi, Google wifi and Ubiquiti amplifi hd. I've had a look at these if I was going to cover a larger area. Another option would be to have an Ethernet cable run from the study to somewhere in the center of your house, that way any router could be in the middle of the house, or where you primarily use your devices. If you're getting NBN HFC they will use the same cable point in the study and connect an NBN cable adapter, which is similar to the Telstra cable adapter in that any router can connect to if.
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Level 24: Supreme Being
Level 24: Supreme Being

Re: Replace Netgear CG3100 with New Telstra Smart Modem

If the problem is due to the WiFi  speed of the CG3100 you could use a router with faster WiFi from a computer shop such as Harvey Norman . The CG3100 should be set to Bridge mode by turning of NAT and WiFi in the modems GUI. Connect the WAN port of the router to a LAN port on the CG3100.

 

If you bought a smart modem and cable adapter you would also have faster WiFi and 4G backup if the cable connection fails. The other advantage is that if there is a problem and you had non Telstra router it will be harder to get support in checking that the non Telstra router is set up correctly.

 

 

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Level 2: Rookie

Re: Replace Netgear CG3100 with New Telstra Smart Modem

cf4 - there's a lot more support out there for non ISP provided devices because of availability. They're not hard to set up and they have more options available in the settings, if you're a more advanced user.


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Level 2: Rookie

Re: Replace Netgear CG3100 with New Telstra Smart Modem

I have the same issue with the placement of my cable modem. (small house but full brick and poor wifi in the bedrooms.

The solution is to use an external wifi source. Wifi extenders do work when placed correctly, but they're not a great solution. Either a Wifi Mesh system like the Netgear Orbi or Ubiquiti amplifi, these are a series of extenders and a 'home' device that are designed to be seen as a single access point by your devices. A more advanced system of multiple wireless access points connected back to the modem is a more capable solution but is harder to set up. I would speak a local IT specialist though rather than your local JB as they will have a wider range of options. I'd recommend PC Case Gear if you're in Melbourne (they also sell nationally online).
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Level 24: Supreme Being
Level 24: Supreme Being

Re: Replace Netgear CG3100 with New Telstra Smart Modem

With a non ISP supplied modem there might be more support from the general community and there will be more options for customizing the settings but if you have a non ISP device and fault develops it is much harder to get support from the ISP support staff if you have an non ISP supplied modem.

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Level 4: Private Eye

Re: Replace Netgear CG3100 with New Telstra Smart Modem

I had a similar problem to you. I am in a large multi-storey house, with solid stone walls. I resolved it very satisfactorily by buying a couple of new wifi routers (I used Netgear R6220, about $150 each) and Ethernet Cat6 cable (available at Harvey Norman, Officeworks etc in various lengths up to 25m) to connect the new wifi routers to the existing CG3100 cable modem. The new Netgear routers have more powerful radio transmitters than the CG3100, and are situated physically closer to the users.

 

In practice, this means that I can walk from room to room, and my device will switch seamlessly from one wifi router to the other, without the user noticing anything, as it reaches a stronger wifi signal. I am on high speed cable, and get 115 Mbps download speeds at the CG3100 cable modem. Over wifi off the Netgear R6220 routers at the end of their Ethernet cables, I also get 115 Mbps on 5 GHz and around 65 Mbps on 2.4 GHz. Naturally these speeds drop the further the user is from the wifi router, so placement is important.

 

To achieve this, I left the CG3100 cable modem in place and operational. That meant that I wasn’t fiddling with my working Internet arrangements (one less technical thing to go wrong).

 

I ran two cables from the CG3100’s LAN sockets to remoter parts of the house, and attached the other ends of the Ethernet cables into the Internet ports on the Netgear R6220 wifi routers. Within the R6220 configuration screens, they were set up in Access Point mode (well described in the Netgear user manual) so that the only DHCP server on my network remains the CG3100. (In plain English, only the CG3100 is handing out IP addresses. You must only have one DHCP server on the network).

 

Each Netgear R6220 was configured with the same Network Name and Password as the existing CG3100, but (and this is important) with different Channels, so that there’s no interference. On 2.4GHz, use only Channels 1, 6 or 11. On 5GHz, use well-spaced Channels. As a refinement, I gave each R6220 a fixed IP address so that I can login to each router easily for any software maintenance.

 

So I now have three transmitters spaced at sensible places around the house, close to where the users are. It works well.

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Level 1: Cadet

Re: Replace Netgear CG3100 with New Telstra Smart Modem

Thanks so much!

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