Apple Time Capsule Keeps Dropping Internet

My Apple Time Capsule keeps dropping internet or having extremely slow internet. If I run a speed test I am getting 90+mbs. What occurs is if I try to load a page, there will be a very long delay and sometimes the page will eventually load, other times it won't. When I try to stream something from youtube, If I can get to the page of the video, it won't have an issue. When I hard wire to my modem, I don't have an issue at all. Only hardwired through the router or using wireless through the router does this occur. The light on the router never has turned amber and the link light on my modem is constantly flashing. The only thing that will occur is that the Apple Airport utility keeps connecting and disconnecting from my modem.
I've reset the router and modem. I've restored the router to factory settings and reset up my network, all to no success.
Any help would be greatly appreciated.
Thanks

Thinking I'll replace the motorola with a Cisco DPC3010
You may find it is not much better..
I do think the problem is more on the Apple side..
If you are a tech.. let me suggest you make yourself up a 100 mbit (ie use only the two pairs) crossover cable..
If that does not work.. try reverse polarity..ie in the ethernet on one end swap + and - .. It is an issue that has cropped up before where ethernet is just wired wrongly.. and it doesn't fail completely but becomes unreliable.
BTW the hardware reliability of the new AC version apple routers.. is definitely on the bottom of the apple list.
I bought an AC TC and the first one had this WAN port issue from day one.. when I replaced it after a week (it died completely which was convenient).. the second one has been much better).
The modems I have heard that works well is the zoom or ubee..
Using another router doesn't need to be expensive.. you can still stick to the apple in bridge.. you only need a router that does routing..
And the TP-Link can be flashed to gargoyle.. a hugely superior firmware btw.. solid .. reliable and it will track usage and do a lot of stuff well beyond Apple's keen.

Similar Messages

Apple Time Capsule and Comcast Internet.. a Relationship from HE77

Hello,
I cannot believe I have waited this long to ask for help from you guys, but here I am pleading for advice..
I have Comcast Internet, and Direct TV television service. I've been experiencing major issues with both but I think that I've realized the issue. My wifi signal with Comcast All in One or the seperate modem.router they tried SUCKED!!! But I'm pretty sure that the issue is the fact that I have 2 digital baby monitors that run on a 2.4ghz frequency, which is exactly the frequency that Comcast wifi runs on.
The reason why I brought up the Direct TV thing is bc I've had them at my house several times because my Whole Home Media Center simply would not stay online, and when it did, its speeds were so slow downloading on demand content. But, everything in my house is slow, not just Direct Tv. This week the Direct Tv people hardwired their equipment directly to the Arris All in One Comcast router so that shoule alleviate that issue.
My thoughts are this. I know that my Apple Time Capsule can put off 2.4 as well as 5ghz frequency. So my questions are:
Can i have both the all in one AND the time capsule putting off their own wifi signals.. The all in one using their standard 2.4ghz for some things, and the Time Capsule putting of the 5.0ghz for others.. If so, how do I do this and not have any issues such as double NAT, and things like that?
Should I just put the All in One in Bridge mode, and simply use the 2.4ghz and 5.0ghz from the Time Capsule to address this issue? How do i do that? Also, would having the direct tv equipment plugged into one of the 4 ehternet ports on the All in One still allow it to pull internet from it, or should I just plug that into the time capsule as well?
Are there devices that for whatever reason will NOT be able to log onto the 5ghz frequency?
I keep hearing about bandwith this, and bandwith that.. I know I have a lot of devices pulling internet at once including, 5 direct tv recievers that somehow always need to be online, 3 iphones, 2 ipads, imac, apple tv, smart tv, laptop, xbox 360 (which really isnt ever even plugged in) Is there any reason to be fearful that the bandwith the Time Capsule puts out may not be able to handle this load any better or worse than the all in one?
I will but lunch and/or dinner for anyone that can help me get this working, i swear!!

But I'm pretty sure that the issue is the fact that I have 2 digital baby monitors that run on a 2.4ghz frequency, which is exactly the frequency that Comcast wifi runs on.
That will sure as anything mess up your wifi.
This week the Direct Tv people hardwired their equipment directly to the Arris All in One Comcast router so that shoule alleviate that issue.
Ah.. hard wired.. that is the solution. Do not use wireless for media streaming.. it is destined to fail.
Can i have both the all in one AND the time capsule putting off their own wifi signals.. The all in one using their standard 2.4ghz for some things, and the Time Capsule putting of the 5.0ghz for others.. If so, how do I do this and not have any issues such as double NAT, and things like that?
You cannot turn off 2.4ghz in the TC.. but that is unlikely to be an issue.
Bridge the TC.
Setup wireless to create a wireless network.. Use the same SSID as the Comcast all in one. Same security.. but use a different channel.. how you will do that with baby monitors x 2 I am not sure.. you may have to accept some overlap. There are only three non-overlapping channels, 1, 6, 11 .. pick the least signal one where you setup the TC.
Should I just put the All in One in Bridge mode
No you cannot do that. You can turn the wireless off though.
Also, would having the direct tv equipment plugged into one of the 4 ehternet ports on the All in One still allow it to pull internet from it, or should I just plug that into the time capsule as well?
That is why the unit cannot be bridged.. you will mess up the TV.
Are there devices that for whatever reason will NOT be able to log onto the 5ghz frequency?
Most old stuff.. only the most recent iphone and ipad are 5ghz. Most stuff requires 2.4ghz.
And there is an issue.. range of the 5ghz is poor.. you need high power wireless devices.. and none of the apple routers rate above mediocre. Even high power ones suffer dropoffs.
I keep hearing about bandwith this, and bandwith that.. I know I have a lot of devices pulling internet at once including, 5 direct tv recievers that somehow always need to be online, 3 iphones, 2 ipads, imac, apple tv, smart tv, laptop, xbox 360 (which really isnt ever even plugged in) Is there any reason to be fearful that the bandwith the Time Capsule puts out may not be able to handle this load any better or worse than the all in one?
To be honest it is not going to fix the basic problem.. you probably do not have enough internet bandwidth share.. but the more devices connected the lower time slice each one gets .. that isn't the main trouble though.. it is the efficiency also drops off. Apple routers have no QoS.. this is important.. some things need real time connections.. streaming media, voip, etc.
Other stuff doesn't .. uploading or downloading email or updates. It is important that a choked system has a way of getting the best out of limited resources.. and that is QoS Quality of Service.
Look at a better router.. I recommend Asus RT-N66U as having far superior range and handling QoS.
You should also do a proper site survey to see how much wireless signal you really have.. but again you run into trouble.. the baby monitors are not going to show up unless they are wifi based, which is unlikely.
Sorry but until you can finish with the baby stuff you are going to have to live with non-ideal world.

Time Capsule keeps dropping network connection

I recently got a Time Capsule to replace a dead external drive and my AirPort Express. I was able to set up the Time Capsule as a router with little trouble but using it as a Time Machine backup drive is driving me crazy. Each time I start a backup the Time Capsule eventually drops my network connection before it can finish. I have about 200GB on my internal drive. Could this be too much to transfer over Wi-Fi?
I never experienced a dropped network connection when I was using the AirPort Express and my second Mac (a G4 iMac) never looses the connection. Any ideas what could be going on here?

Very interesting. Been working this problem from every angle. Noticed two kickers.
1) Transmission would refresh to fast when opening and closing menu bar airport icon.
2) Transmission never fades when running iStumbler which is continuously interrogating Time Capsule.
MacPro software seems to be forgetting that it is hooked up and drops out. It is a software thing.
I am starting iStumbler for each session automatically now and am having no drop outs. It is keeping Time Capsules attention. It is not required for all computers in the house but certainly is for the MacPro from which I control everything.
Amazing. Can one of the FanBoys bring this to the attention of the right person at Apple? Also, I need work and have many stories of trouble shooting successes. Tell them to hire me. It would save you guys a lot of time.

Time Capsule Keeps Dropping Connection

Hi, I've had trouble keeping connectivity with the Time Capsule. This is relatively recent. Everything was fine for over a year. Now it will drop connection in the middle of an internet search and look for available connections. Any help will be greatly appreciated. Thanks!

Have you reset the TC to factory and redone the setup? This is a major fix for a lot of issues. Simple fact is the TC needs a boot in the pants every now and then.
I have unplug the power cord & plug it back in.
That is not a factory reset..
This is a factory reset.
Factory reset universal
Power off the TC.. ie pull the power cord or power off at the wall.. wait 10sec.. hold in the reset button.. be gentle.. power on again still holding in reset.. and keep holding it in for another 10sec. You may need some help as it is hard to both hold in reset and apply power. It will show success by rapidly blinking the front led. Release the reset.. and wait a couple of min for the TC to reset and come back with factory settings. If the front LED doesn’t blink rapidly you missed it and simply try again. The reset is fairly fragile in these.. press it so you feel it just click and no more.. I have seen people bend the lever or even break it. I use a toothpick as tool.
N.B. None of your files on the hard disk of the TC are deleted.. this simply clears out the router settings of the TC.
How is the TC setup in the network?
not sure what you mean by this, followed the prompts when i set it up.
Open the airport utility when the TC is working.. click on the TC and take a screenshot of the summary info.
Then click edit and go to the network tab.. take a screenshot of that to and post it.
What is the link speed between the computer and the TC??
Please run the wireless diagnostics and then the utility which is part of the diagnostics and tell us or post that as well.
About Wireless Diagnostics - Apple Support

MacBook Air + Time Capsule frequently dropping internet connection

I too have been having frequently dropped wireless connections between my MacBook Air (MBA) and my Time Capsule(TC). My TC is connected to a cable modem and I also have an Airport Extreme Base Station (AEBS) at a different part of my house which is used to extend my network connecting via ethernet to a PC running VISTA, and wirelessly to a printer and an older MacBook. I also connect wirelessly to my home network with two iPhones, a Squeezebox 3 with a server running on the PC. I have an Apple TV and a Squeezebox 2 connected to my TC via ethernet.
When my connection drops I will either see a Time Capsule disconnect message or if I am surfing the web, the browser just hangs. The wireless ICON strength is still pegged a the max level. None of my other devices (wireless or ethernet) connected to the TC or the other AEBS seem to drop their internet connections. I can re-establish the connection on my MBA by either turning off my MBA's Airport wireless and then turning it back on or by running the network diagnostics. The latter method usually shows green lights for all but the "Internet" and the "Server" which will have yellow lights. Usually when I select my wireless network and press continue, it will prompt for my WPA2 password which I have to reenter even though I always check the box for it to remember the password in the keychain.
After reading the various discussions on disconnect problems and trying the various "solutions" I was still having the disconnect problem.
Last night, I decided to turn off my Time Capsule and was then able to maintain an internet connection for considerably longer than before. Perhaps it was one of the other "solutions" that caused that. After turning my TC back on, the disconnect problem reoccurred within about 5 minutes.
Next, I did my too frequent Time Capsule remedy which was to disconnect the power and then reconnect the power. (Seems like some of these devices (APPLE TV included) could use power switches.) I then deleted the .sparsebundle backup file on the Time Capsule. I was then able to restart Time Capsule backup and things have been running uninterrupted for over 12 hours...still backing up (20GB in 12 hours? Doesn't seem very fast!). I can report back later if this actually "fixes" my disconnect problems in the future. I am dubious that it will.
I have several questions about the MBA and the TC/Time Machine backup operation.
1.) I often forget about the TC when I close the lid on my MBA and haul it off to work. At work (connecting via ethernet), I will eventually get a TC disconnect error. But I am wondering if there are points in the backup process where a random disconnect will cause some sort of TC corruption. What is the recommended way of handling this? Should I always stop the Time Machine backup before turning off my MBA? (A nuisance if so!)
2.) What is happening when the TC backup operation stops functioning and hangs up the MBA's internet connection? (I see lots of messages logged in the system log when this happens; but, of course, I don't have much of a clue of which ones are normal and which are not normal. I could send a copy of the logs when it happens next (I am assuming it will).
Also one other anecdote. A few months back, I had taken another AEBS to my work to use during a training conference. My MBA kept dropping its connection while the other PC laptops in the room maintained their connections...(very embarrassing!). Maybe one of the other "solutions" would have fixed the problem or maybe if I had just turned off my Time Machine backup it would not have disconnected. I will repeat that exercise when I get a chance now that I have some things to try.
It seems pretty clear to me from my own experiences and the discussion reports of others that the disconnect problem lies in the MBA's wireless internet connection software or the configuration of it. It seems like it is having difficulty recovering from various wireless connection "mishaps".

Folks, I was having a very similar problem for the last 6 months. My connection was fine until June 2008, after which my Macbook and my Time Capsule would constantly conflict. If I rebooted or reset the TC, or the MB, things would be fine for a few minutes or sometimes a few hours and the problem would recur soon thereafter. About a month ago, I had to do a clean reinstall and the problem vanished for about 5 days, after which it reappeared. My MB never had a problem at work, or at someone else's home or with other routers, only with TC. Apple sent me a new TC, then they replaced my Airport card but the situation did not change ... UNTIL ABOUT AN HOUR AGO.
An hour ago, I called Apple for the nth time in the last 6 months, and the rep heard me out (just like the previous n-1 reps). He then asked me to to System Preferences --> Accounts --> Login Items and asked if Real Player Downloader showed up in my list. Indeed it did. He asked me to remove it, and told me that Apple had just figured out that the Real Player downloader was recently found to be causing a drop in the connection between Macbooks and the TC (as well Airport Express).
The problem I've been having baffled everyone. All the previous reps, the guys at the Genius Bars, nobody had a clue. Joe (the rep I spoke with this morning) seemed very confident that the removal of the Real Player Downloader from the list of login items would resolve the problem. So far, so good. My connection seems solid (its only been an hour, but earlier it would drop after 5 minutes of use).
I hope my problem that (literally!) used up hundreds of hours of my time has been finally resolved. I hope this solution will work for at least some of you as well. What gives me hope is that this solution is logically consistent with the history of my problems. I probably first downloaded Real Player in June 2008. And when I did a clean install, I remember downloading Real Player a few days after the reinstall. So I'm pretty hopeful that my issue has been finally resolved.
Shame on Real Player for putting out a defective piece of software. And thank you Joe!

Time capsule keeps losing internet connection

I seem to keep losing the internet connection, and this seems to be when Time Capsule is doing backups. It is fine most of the time, it seems to have an IP address, but I can't connect to the internet. This seems to happen when it is doing backups. Have I got the time capsule set up correctly? I am using it with BT Home Hub which is also a wireless router, and I have set up Time Capsule to join the same wireless network. Most of the time it works fine. It also works fine when connected via ethernet, so I don't think there is anything wrong with the Time Capsule, maybe just the way it's set up. Or does it always behave like that? Can anyone offer any suggestions?

I have Snow Leopard 10.6.3, I don't have 10.6.4 yet though am just about to install it, so it can't just be related to 10.6.4.
This morning when I booted up, I had lost my desktop background picture, the clock was wrong and my keychains seemed to be messed up. Nothing else seemed to be wrong, but I restored a backup anyway, and repaired the keychains. I don't know whether this had anything to do with Time Capsule or not, but I have my suspicions. At the moment I have connected the Mac to the Time Capsule by ethernet, and that seems to be OK, but I'd like to be able to put the Time Capsule in another room, to extend the range of the wireless network. I did wonder if there could be interference between Time Capsule and the Home Hub, as they are quite close to each other.
I do not seem to have any problems when using my Macbook Pro.

Airport Time Capsule keeps dropping out

I have just got an Airport Time Capsule to store my photos on from my mac book pro. TC is in bridge mode to my existing router and green light is on. Mac cant find the device. If I disconnect and then reconnect power to TC the mac finds it again for about 2 minutes and then it drops out again. Help!

They do seem to have some wan connection bugs.. It is not just your virgin media modem.. lots of cable modems are bad.. lots of fibre modems are bad.. some work and some not.
You can try and fix it.. sometimes using a crossover cable or a switch between the modem and the TC will fix it.. but IMHO the TC is expensive and this is not the kind of testing you should be doing as end user.. take it back and get your money back.

Time capsule keeps dropping ethernet connection to BT Voyager every minute

I have just bought a 1TB TC to get the benefit of better wireless and the backup facility all in one. Previously I used a BT Voyager 2110 as ADSL modem and wireless router. I have set up the TC to connect from the WAN port to the LAN port on the BT router, put TC in bridge mode, and disabled wireless on the BT voyager. This means the BT Voyager does all the DCHP config and PPPoA, transmits this to the TC via ethernet and then TC broadcasts this on wireless. So far so good.
The TC works with this ok, but for whatever reason keeps losing the ethernet connection every minute or so. Literally almost flickering from amber light ('ethernet cable unplugged' for about 1-2 seconds) then back to green light sometimes several times a minute. This means I get no continuous or stable connection, e.g. for downloading/gaming online. The same happens if the BT router is in bridge mode and the TC configures the PPPoA itself - it has to 'renegotiate' every minute or so, which is very frustrating.
The ethernet cable is fine (I have tried two different cables), and each works with no problem if iMac is connected to TC (no internet though obviously), or if iMac is connected via LAN to the router for direct internet access - the network settings in system preferences shows no similar frequent loss of connection. The problem only seems to arise as between BT router and TC via ethernet. I have done resets of both the TC and the router, both are on the latest firmware updates as well so I am now at a loss. If anyone can help it would be really appreciated! Thanks.

Hi there, thanks for your quick reply.
Well I'm not actually trying to get the TC to do that function, merely to wirelessly broadcast what has been negotiated by the BT Router. I.e. the router is not a bridge letting the TC do the work, but rather the router has all the settings and then this is just fed down the ethernet, just like it would be to a computer.
Connection settings have always been 'connect using' ethernet, and 'connection sharing' is off (bridge mode).
The thing is that this config clearly does work as I can get internet access, but I can't work out why the ethernet connection is dropped so frequently (and at all) which means I have no stable connection.
I have tried changing the router to PPPoE, which still gives me internet access but does not resolve the problem of the ethernet connection being dropped.

Speed drop page caused by Apple Time capsule????

hi all,
I have had BT infinity for about 2 months and prior to that I had regular 8MB broadband
the first fews days were great getting about 30-40MB
then the speed drops to below 1MB!!
I have an apple time capsule which is connected to the BT Homehub via ethernet for wireless printing, NAS drive, speakers and back up of my apple hardware (no windows based hardware in the home)
after numberous phonecalls to support this is what has happened:
reboot openreach hub and BT homehub brings speed back up again
First BT openreach engineers changed the white openreach modem
Second engineer said that everything was fine but the Time Capsule was the cause..
I have searched online and cannot see any reason as the time capsule is working fine.. it has never needed any re-boot etc etc
please any advice would help
Thanks
Bhav

You may be suffering http://community.bt.com/t5/forums/replypage/board-id/BTInfinity/message-id/51544 or a variant. Also summarised in http://community.bt.com/t5/BT-Infinity/BT-Infinity-2-Home-Hub-3-Speed-drops-to-less-that-1Mbit-Uploa...
It looks as if you will have to suffer occasional drops and reboots or similar (as in the threads) until BT fix the Hub firmware. Unlikely to be the Time Capsule.

The Apple time capsule provides disc memory, a wifi network, and router functions. It would normally be connected to the internet via cable modem. If I wanted to use a wireless cellular connection to the internet, how would I do that?

The Apple time capsule provides disc memory, a wifi network, and router functions. It would normally be connected to the internet via cable modem. If I wanted to use a wireless cellular connection to the internet, how would I do that?

If I wanted to use a wireless cellular connection to the internet, how would I do that?
The wireless cellular device would need to have an Ethernet port, to provide an Ethernet signal to the Time Capsule's WAN port.

I have an apple time capsule and am about to have xfinity cable and internet hooked up in my new apartment. The cable provider said I need a modem that is Docsis3 capable - will my time capsule do the job or do i need another modem? Thanks

I have an apple time capsule and am about to have xfinity cable and internet hooked up in my new apartment. The cable provider said I need a modem that is Docsis3 capable - will my time capsule do the job or do i need another modem? Thanks

will my time capsule do the job or do i need another modem?
The Time Capsule is only a router...with a built in hard drive. It does not have a modem built in, so you will need to use a separate modem with your new calbe service.
If the cable provider offers a modem with their service it would be good idea to use that device, as you know that it will be supported by your provider in the event of any Internet connection difficulties.
If the provider does not offer a modem, I am sure that they have a list of compatible modems on their website, or check with customer support for more information.

Use of Apple Time capsule as router on internet by at&t uverse.

I have installed the U-verse combo at my home. I also have an Apple Time Capsule which has a router. How can I use the router of my TC without using the router from at&t router. What I need is to access some websites that uverse is blocking.

How can I use the router of my TC without using the router from at&t router.
Well, the Uverse router needs to be in Bridge Mode in order for the Time Capsule to operate as a router for the network.
Unfortunately, the Uverse router.....(more accurately, the version of the router that Uverse uses).....will not allow the device to be configured as a Bridge.
The best that you might do is use the DMZ mode on the Uverse.....but this will still create a Double NAT error.....which will likely cause connection and browsing issues.....so DMZ might not be a solution at all.
What I need is to access some websites that uverse is blocking.
If Uverse is blocking connections now, they will still be blocked when you connect the Time Capsule.
For now, I would recommend that you check with Uverse Support and get them to un-block the websites that they are now blocking. They will likely deny that they are doing this, so you may need to ask for an upper level supervisor.

Access Time Capsule over the internet

Hey guys! I have a problem. I cannot access my Time Capsule over the internet.
I have a Time Capsule 2013 which connects to the internet using a PPPoE connection and which provides wireless connection to other peripherals in my house.
The TC is running the latest firmware and I've added my iCloud account in AirPort Utility settings, in order to access the TC over the internet, via Back to My Mac.
Whenever I'm away from home, I cannot access the TC.
I see it in Finder's sidebar, but whenever I press the "Connect As.." button I get the following error:
"There was a problem connecting to the server “Time Capsule”.
The server may not exist or it is unavailable at this time. Check the server name or IP address, check your network connection, and then try again."
I must add that I have a dynamic IP. Whenever the Time Capsule restarts, it gets a different IP.
Am I missing something?
Please help me. It's really important for me to be able to reach it when I'm away from home.

So the modem is bridged and the TC is doing the PPPoE authentication.. and it gets a public IP on the WAN interface.
The dynamic nature of the IP is not a problem with the BTMM and iCloud type system which should keep the intermediate connection in the cloud up to date.
What about the connection at the other side.. are you getting a public IP.. are you behind a firewall or restricted access? Remember both sides of this have to work.
See this thread.. you are not alone.. all is not sweetness and light unless you get a proper business account with static IP.
https://discussions.apple.com/thread/3699096?start=0&tstart=0
Apple info has a bit about issues that people experience.. and Tesserax has some setup info.
Remote Access
I would use the public IP and see if it works.. that means you need to check the IP before you leave home or use your phone tether and do the test at home so you can type in the public ip and use direct access .. at least to test it.

Time Capsule intermittently drops connection

Hello all.
Right around the release of Mountain Lion I started having issues with my Time Capsule. I'm not sure the issue has anything to do with Mountain Lion directly since I didn't actually update until today thinking it may help solve my issue. But basically, my TC intermittently drops the Internet connection just long enough to interrupt what I'm doing but comes back in just a few seconds. For example, if I'm playing a game, the game server will disconnect me. I wait about 30 seconds and then I can log back in. If I'm browsing a website the page will just freeze and go blank or came back in just a few seconds depending on how long the signal seems to be gone. The computer I'm on when this happens the most is not using wireless, I run an Ethernet cord directly to the TC since wireless is generally unreliable for gaming but I have experienced the issue on other devices.
My setup is my TC is being used as a router so it's connected directly to the modem from my ISP. There are a few other devices directly plugged into the TC and a few that use it wirelessly. I've done some troubleshooting and if I connect my computer directly to the ISP modem I have no issues, so I know it must be the TC. Nothing about my setup has changed in over a year and this problem just randomly cropped up. The only thing I can think of is a few weeks ago I reset my router to factory and renamed my network when I got rid of my Airport Express and started using Apple TV. But this issue started even before I set up Apple TV so I don't think it's that.
I've been researching the issue for days and can't seem to find a solution. Any suggestions would be appreciated.
Thanks!
Time Capsule 802.11n 3rd Gen
OS X Moutain Lion 10.8.1
Airport Utility 6.1 and 5.6 installed

My setup is my TC is being used as a router so it's connected directly to the modem from my ISP. There are a few other devices directly plugged into the TC and a few that use it wirelessly. I've done some troubleshooting and if I connect my computer directly to the ISP modem I have no issues, so I know it must be the TC. Nothing about my setup has changed in over a year and this problem just randomly cropped up. The only thing I can think of is a few weeks ago I reset my router to factory and renamed my network when I got rid of my Airport Express and started using Apple TV. But this issue started even before I set up Apple TV so I don't think it's that.
What modem (make and model.. and type of broadband) is it and is it working as a router.. when you say you test by plugging directly to the ISP modem .. what changes do you have to make for that to work?? Does the TC show a double NAT error when it is connected to the modem?
Gen3 TC have a nasty board fault.
Can you check the log and see if you are getting disconnection error messages.
Can you downgrade the TC firmware to 7.5.2 just to test? If you are correctly using it with a single router in the network,, either the modem router or the TC.. as the only router.. I have a pretty poor opinion of the later firmware. It is only a test and you can upgrade again to 7.6.1 without any big hassle.
But do save the configuration and do a full factory reset when you go backwards.
See board fault info here.
https://sites.google.com/site/lapastenague/a-deconstruction-of-routers-and-modem s/apple-time-capsule-repair/new-issue-with-a1355-gen-3-tc
What you are seeing is exactly how this fault first manifests.

What is the most reliable modem for my Apple Time Capsule.

ooking at getting a new modem because my Router/Gateway (Arris DG960) is not translating my port forwarding from my Apple TC. I have done a lot research and the general consensus is that the best router is the Motorola SB6141. That being said over 75% of reviews that involved Apple TC's stated that they had a lot of trouble with it working with the TC. Most suggestions led me to the Zoom 5341J. It seams to have a much better success rate with Apple TC. Any other modems that I should consider? Anybody else own, experienced these routers? I am looking for a modem only, no modem/router.
Service: TWC
Speed: 50D/5U (Ultimate)
Router: Apple Time Capsule 2GB ME177LL/A 802.11ac
TWC Approves these modems:
Vendor
Model
Firmware version
DLink
DCM301
99.555mp10.011
Motorola
SB6121
1.0.6.8-SCM01
Motorola
SB6141
1.0.6.12-SCM00
Motorola
SB6183
9.2.0.0-GA-00-19-NOSH
Motorola
SBG6580
SBG6580-6.5.2.0-GA-06-077-NOSH
Motorola
SBG6782AC
SBG6X82-8.5.0.0-GA-05-15-NOSH
Netgear
N450 CG3000Dv2
V1.00.05
Netgear
C3000-100NAS
V1.01.05
Netgear
C3700-100NAS
V1.01.05
Netgear
CMD31T
V504b
Zoom
5341J
5.5.4.9J
Zoom
5350
5.5.3.6
Zoom
5352
5.5.7.13
ZyXEL
CDA30360
3.1.3.6NA

I thought the Motorola SB6141 was the best choice about 8 months ago when all the glowing test reports said it was best, and I had always had good results from their products in the past. So, it might be the best.
But, I tried 3 different SB6141s over the first week and none would hold an Internet connection more than 3-4 hours. Might have been a bad run....it happens.....but 3 trips to the store was enough, and Time Warner support said they had been getting reports of problems at the time with a firmware mixup on the Motorola, so I decided to toss a coin and try to get some work done.
I had no idea what to try next, but my wife was with me when I went out modem hunting.....and she liked the appearance of the Netgear CMD31T because she thought that it matched the AirPort Extreme nicely. Reason enough. It was "best" in her mind.
So, we tried a Netgear. Operation has been flawless since we plugged it in. Not one single drop that I know of in 8 months.....not counting a power outage during an ice storm.
The last time that I posted on a similar question to say that I had had good luck with the Netgear, it was only a few hours before another user trashed it, saying that the Motorola was the better product by far. And it might be. But, stuff like that is normal for the forums.
The Netgear might explode tomorrow, but I would probably try another if it did.
I have no idea what your results might be with any modem that you choose.

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