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A lot off people are having trouble with the Gen 2 modem maintaining a WiFi connection. Try turning of both Google Home mini, smart TV and reboot modem. If phones stay connected for over ten minutes turn on the Google home mini and then after another 10 minutes turn the smart TV on and see if either one cause the phones to drop out.
The smart TV if it supports miracast or chrome cast creates its own wifi network on the same channel as the modem. This shouldn’t but could be causing the wifi devices to drop out.
Have you tried rebooting the modem and leaving Smart TV and Chromcast disconnected and seeing if other devices remain connected or can connect.
The only real solution is a modem firmware update but firmware updates take time to develop. The reason for drop outs has to be determined then a solution developed and the update has to be tested before it is released.
In the mean time you could you could try setting up a static IP address and custom DNS on your device and turning off LAN IPv6 (Advanced > Local Network as per this post
Ip address 192.168.0.xx were xx is a number between 2 and 254 each must have a different address.
Network mask 255.255.255.0
Gateway address 192.168.0.1
DNS 1 18.104.22.168 or 22.214.171.124
Google your device to find out how to set up a static IP address. Unfortunately this want work for google chromcast as I don,t think they have this feature.
I believe these Arcadyan Smart modem V2 units have bad firmware.
Ever since I got NBN in December and had this Smart modem V2 connected I had rebooted it 16 times in 4 days to restore service. Symptoms included: delays in web browsing and some pages timeout, cant bring up routers web interface when router fails, cant bring up Telstra speed test site and when it does come up its the Perth server which doesn't work. Intermittent connection to game servers.
I connected my old router which I used on cable broadband and worked flawlessly for the next week.
I got Telstra to send me another modem and the placement V2 and it had exactly the same faults as the first.
I then got them to sent out the original smart modem V1 and this unit has been working well so far.
I just today plugged in the Gen 2 modem Telstra sent me to replace my old modem which was working OK apart from consistent and untimely dropouts together with the wall power socket blowing up. Seriously dangerous situation.
In any case, plugged in the Gen2 - all seemed to working fine for 5 minutes then nothing. Trouble shot a number of times, also with a Telstra phone help adviser and the modem was all over the shop. All lights GREEN yet at some times was getting snails pace bit download other times, great download and then most of the time nothing. It's a crock of **bleep**e. Have read the forums and it seems that the Gen 2 is riddled with issues. Reconnected my old modem and so far no issues yet there will be the inevitable dropout. It's unbelievable that this can occur at such regular intervals with Telstra. Unbelievable. Gen 2? yeah my arse!
Sorry to hear your having problems but it seems be a common problem.
I had same issues on gen2 with all lights green and no access.
Do your Gen2 issues occur on a wired Ethernet connections and wireless as well ?
Are you able to access the routers web interface on http://192.168.0.1 when the loss of internet access occurs?
Are you able access https://speedtest.telstra.com ?
So that we can provide feedback regarding these devices to the relevant team, it would be helpful if you included the following details if you are experiencing this issue:
1. There are two different modem models that are referred to as Telstra Smart Modem Gen 2 and they also have different firmware, so please advise if you have the LH1000 or the DJA0231
2. The firmware version that your modem currently has. You can locate the firmware version by accessing the modem page at http://192.168.0.1. The firmware version should appear on the first page by the Gateway Information. Customers with the LH1000, the password to log into the modem is: Telstra
3. Have you tried disabling Band-steering (located under WiFi- in the top menu) and the IPv6 State (you will find this option under Advanced, then Local Network)
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In my case, both gen 2 modems I received are:
Boot version: 1.0.38-116.118
It made no difference switching off band steering on WiFi .
In my case internet connectivity failed whether you where on Ethernet or wifi.
Disabling IPV6 also had no effect. Within 10 minutes of booting up this modem
again I lost internet connectivity.
Reconnected my gen 1 Technicolor DJA0230TLS modem and its been working flawlessly.
I'm sad and glad that I am not the only one with this issue. I am on my second modem now and after NBN tests reporting no fault I'm now waiting for someone to call me (after 6pm tonight. what a surprise for them that while I'm at work that I cant access the modem) to fault find some more.
The exact same issue, every 10- 30 minutes I have to reset the router to get access to web pages and the router menu. I've just switched to Telstra in December and have had the worst time porting telephone numbers, this modem issue just puts a cherry on top.
Well they will try and fault find as part of their procedure every time you call.
For me after the second call and second modem, I insisted they send out yet another modem.
It was purely by chance that this time they sent me the older model "Telstra Smart Modem DJA0230TLS Technicolor" and it worked. Looks like this
In my case I had my older Telstra Gateway Max Cable Modem (Netgear Model) and I configured it to WAN mode and plugged it up to NBN box and worked as well, while I waited for new modems to be posted out. Off course the home phone wouldn't work as
they weren't capable..
If you have an older modem with a WAN port on back you may be able to do the same.