WRT160N cable modem slowing down

Hello
I am going from ADSL to cable internet and got a docsys 3 - Touchstone TM702 modem. When i connect my PC directly to the modem no problem. I get 100% bandwidth. When i connect the router in between I get this result
Here im downloading at full speed 5,5MB
This is what i have done:
- Upgraded to the latest firmware
- Disconnected wireless
- Changing back to factory defaults
- Cloned my MAC adress
- Did the power cycle (PC off, router off, modem off, modem on, router on, PC on)
- Deinstalled antivirus
- Deactivated home defender
And still no go
I have no problems what so ever with my old provider (ADSL) which is 8mbit download.
What more can i do?
Message Edited by blackEyEz on 07-27-2009 02:59 AM

Try this :
Open an Internet Explorer browser page on your wired computer(desktop).In the address bar type - 192.168.1.1 and press Enter...Leave username blank & in password use admin in lower case...
On the set-up tab change the MTU Size to 1300 and click Save Settings...
Once you return to the set up page click on the Security tab and uncheck Block Anonymous Internet Requests and click on Save Settings...

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Cable provider slowing down my Mac

I use Charter and I notice in the evenings that my mac is dog slow. Even stuff that does not require internet access runs sluggish. Is this just a issue with Cable modem providers? This kind of reminds me of the soft modem days when they would slow down your entire Mac. Hard modems did not have this problem. Perhaps this may be one reason to use DSL over Cable. Am I correct?

Open Activity Monitor and check your CPU and RAM usage, it could be a program taking a lot of your resources. You can test your internet speed for Charter.

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Solved!
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Actually, I saw your posted solution on another problem to downgrade firmware to .008 and voila! It works. Three computers, three different cable modems, two different WRT160Ns; and the problem all boiled down to the latest version of firmware for this router. After my experience, I'm surprised the forum isn't flooded with these issues. Any idea when they're going to release the next update?

Cable modem link slowness w ISA570 and CLI "show tech" equivalent

Hi, I'm helping out a non profit that has a Mediacom 100mbs link, they get 90+ Speed connected directly to the cable modem, but anywhere past the ISA570 they only get 50-60mbs. They have switched cables, added a separate port, tried different PCs, results are the same, 50-60 mbs max.
Also it's their understanding the ISA570 can't do CLI, so how can they get the equivalent of a 'show tech' command to a file to send offsite for troubleshooting,
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Hello,
There is something similar to show tech on the ISA.
Log into the web GUI, go to Device Management >> Cisco Services & Support >> Send Diagnostics. At the bottom of that page is a Download button that will collect the config file, the logs, and some debug outputs into a zip file. You can use this to troubleshoot the device, although I usually prefer to be on the live device itself to look at things.
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Why is download so slow? on ITUNES 7?! I have Cable Modem!!

Had anyone noticed that the new ITUNES 7 is SOOO SLOW in downloading?? The videos used to download in less than a minute. NOW it is taking FOREVER for everything to download. And my computer is only 1 year old and I have Cable Modem - not slow dial up. Has anyone else had this problem? I usually LOVE software upgrades but I HATE the new ITUNES.
HELP anyone?

It doubful thats its your PC per se, alot of people are reporting the store being alittle on the slow side.
It won't last long, its just apple make all these changes 3-4 days ago, a week or 2 they will have it all str8.
You can overlook your network setup tho, make sure the connection isn't looping around thru ports on the router and slowing you down. I doubt thats it tho, iTUnes increased the resolution of there video, so in turn the files are bigger. This is why iTUnes now has a download manager in it so you can pause things when needed

Why has my native windows 7 Pro-64 network to a windows 7 Pro-64 VM has slowed to a crawl and freezes, after the new Arris cable modem was installed?

Please appreciate the details, so the complete situation can be visualized:
The office network:
New Mac Mini PC running Win 7Pro 64, (in boot camp), networked to an iMac running the same Win 7 Pro 64, VM, UNDER Fusion 7Pro.
To review: My treatment rooms former dell PC/running vista business/ running the server and network versions of my Dental practice mgmt & X-ray capture apps, had no probs WLAN to the front desk iMac running the same PC client dental network apps under the same vista business, & Fusion 4. The dell slowly fried its power supply .
I could not wait to replace it with a Mac mini/ boot camp/ win7 pro 64 bit, as it has to run natively to capture X-rays. The front desk iMac was also upgraded to os10.10.3/ Fusion 7pro/ and its own matching Win7 pro 64bit. The iMac is wired and WLAN connected to a netgear d600 router and a Time Warner Cable modem. The modem then failed and was replaced by an arris modem. As the Arris was configured out of the box, the network ran much slower slowed, as compared to the original modem. BUT- The Vonage 2 line phone system stopped working- no incoming or outgoing voices could be heard after it rang. Then twc remote configured it and the phone now works, but the network iMac slowed to a crawl, and now freezes when accessing the Mac Mini PC dental server to edit or enter data. The Mini perfectly accesses the internet via wifi. It accesses the front desk canon printer by wifi, and can print share they the iMac that is wired to the printer, as well, BUT, the network connection is a spinning pinwheel. The front desk imac easily finds the Mac Mini PC server on the network. It connects easily by entering the servers IPv4 address SHOULD THAT last value change. But if data isn't entered in slow motion, the window and app freezes, and has to be force quit by Task Manager!
Cause:
1. I think TWC switched the cable modem from the default- Non Bridged, to Bridged mode. Could this be the cause?
2. The network setting in fusion, on the iMac is auto detect, a setting that always worked with vista and with the new Win7 system, before TWC installed the new arris modem. 3. Switching to NAT does not work at all is there a different setting to use?
3. Does the Netgear Router have to have a port or pref configured so as not to block the Server.
4. might in need an Access Point (I have an extra netgear wdr3400) ).
5. Do I need an Extender that plugs into the AC LINE?
I hope this info helps.
PS:(some addtl info:
1. File sharing works fine between the minis -Mac and boot camp sides and between the iMacs- Mac and VM sides and between eother side to or from either of the 2 computers! 2. Also either office computer and all of my my home macs , (& my iPad, & iPhone), can access each other instantly and flawlessly, with splash top streamer and jump desktop remote apps, as controller or as client! In fact, the front desk iMac can remote control the mini PC AS IF YOU WERE DIRECTLY ENTERING INFO I TO IT!
SO I think it's either a misconfiguration in the TWC cable modem &/or some additional pref to config in the router? Thanks so much for your help, (been using VM's since VPC1. & Win95 in a iMac, 1999, DV MODEL! (TWC BLAMES VONAGE FOR NOT OPENING SOME PORTS IN THE TELE MODEM. Vonage blames TWC FOR NOTopeningj ITS PORTS IN THE CABLE MODEM, when they meant the ports on the Netgear. They have passed the buck for 6 weeks with not even a guess at what to do. VERY FRUSTRATING! Again, thanks to all!

Okay Saint Steven, I'll bite:
I read your description multiple times, very carefully, and I am still confused. May I suggest the following:
* Follow basic troubleshooting procedures. Isolate each individual problem. Don't try to get everything working at once. Make one change at a time.
* If I read your description correctly, the Netgear D600 (??) Router is the office LAN (not WLAN). Connect each piece on the LAN separately one-by-one, and test each piece individually. Get your LAN and its devices working first. Forget about the Vonage and the Arris Cable modem.
* Next, look at your Internet connection. Again, try each piece separately. Depending on how the original cable modem and the new Arris cable modem are configured, you may also have to adjust the configuration of the Netgear D600 Router.
* Finally, if you are still having problems, try to organize your thoughts and presentation before you post again. List each element in your network. List how each element is configured. Be systematic.
"Arris cable modem" does not help much - some are simple bridges, others are routers, etc.
To answer your questions:
1. I can't tell from your confusing description, but I don't think so. It seems like the problems are associated with the system changes you made (replacing Dell, etc.) and the problems seem to be isolated to the local LAN.
2. Auto detect should work, but it is easy to change and test, as long as you change one thing at a time.
3. No. The Netgear router should allow all communications on the local LAN. Could you have put the "server" in the DMZ?
Note: I could not find a Netgear "D600" model in a web search. Do you mean N600?
4. No. I doubt that you need an additional access point. Based on your description, everything appears to connect to the LAN.
5. No. See 4.
To repeat myself:
* Do careful, systematic troubleshooting.
* Provide carefully written, detailed description of your network and system configurations when you ask for help.
Good luck!

After upgrading to Yosemite, MF 820 ZTE Telenor USB modem does not start, system slow down dramatically / Macbook Pro Retina late 2012/. Also Thunderbolt plug in for Ethernet make the same ! Any idea ?

After upgrading to Yosemite, If i plug in my Zte MF 820 LTE modem into my Macbook Pro USB socket or a Thunderbolt USB Ethernet converter/ into my Notebook, it slow down dramatically the system, unusable, need to reboot and unplug the USB moderm or Thunderbolt interface. So it does work only without any plug in device..!?
Any idea ?

How To Run Telia ZTE MF820D 4G Modem On Lion
Open Network Preferences
Choose the ZTEUSBModem interface
Set “Configuration” to Default
Set “Phone Number” to *99#
Leave “User Name” and “Password” blank.
Check the “Show modem status in menu bar” checkbox for convenience.
Click “Advanced…”
Set “Vendor” to Other
Set “Model” to ZTE USB Modem.
Now click the little phone in the menubar and choose “Connect” from the dropdown.
Link: http://walternaeslund.com/how-to-run-telia-zte-mf820d-4g-modem-on-lion/
I'm using MacBook Pro Yosemite 10.10 and a MF820 too.I had a same problem before.But Now already fixed.
Hope this can help you.
Regrad
Amare YSL

IMac slows down wifi/LAN cable connection

Hello,
I came across a quiet unique and annoying problem, that I have not seen being discussed so far.
I spend the last 3 weeks trying to solve my internet/wifi connection following all kinds of posts here.
Problem: Wifi/Lan internet connection is slow (less than 0.8mbit/s)
Problem only appears when I login with an iMac via wifi OR lag cable
iMac, 2011 27`` Mac OS 10.7.5
Background:
I have a 20mbit/s internet connection with my provider. works fine on iPad, iPhone, appleTV HTC one mini, etc… BUT as soon, as I login with my iMac, the internet connection slows down to less than 1 mbit/s
I have tried following solutions:
- live box (router) was exchanged and is brand new
- security settings on router changes (wpa2 etc)
- all channels on router tested from 1-13
- keychain saved passwords for Wifi and router deleted, PRAM reset
- renewed lease of connected devices (no IP conflict)
- shut down wifi on iMac - connection with all devices great, as soon as i switch wifi on, all devices lose their high speed connection and go down to less than 1mbit/s
- connected iMac via LAN cable: same problem, all speed is lost
- iMac is not in the network - speed is great
- connected iMac via time capsule wifi, same problem. connected iMac via netgear extender, same problem
also, if I open network preferences and start the "assist me" app and run diagnostics, all dots are green except the ISP and server, bit most of the time they switch to green immediately, but connection is still slow.
Reception bar is on "3", so signal strength is no problem, and I´d like to emphasize that this is also happening on LAN cable. and again, if the iMac is disconnected from wifi AND / OR LAN, all other devices work fine.
Would love to hear your thoughts!
Thanks!

Although I have been on Mac OS for a while now, I have never had to troubleshoot faulty network in the mac itself.
OSX does apparently have a safe mode boot..
OS X: What is Safe Boot, Safe Mode?
Try that.. as that gives you the same thing as windows with all the extras left out, so you get a basic operating system only and you can see if the problem still exists.. if it does.. I would simply bite the bullet.. wipe the Mac.. reinstall the OS and then carefully reinstall your applications from original disks/downloads and move your operating files back .. but start a different user on the computer and copy back the min you need to get working again.
If the problem still happens even in safe mode boot then do a hardware test.. because it is possible something has actually failed at the hardware level.
Using Apple Hardware Test

IPad running slow on Xfinity cable modem

Is there anyway to tweak the cable modems to work better on I pads Desktop and laptop are running fine

My iPads work fine with my modem and router.
How slow is your iPad? Does it work OK at other locations?
~Lyssa

Slow Cable Modems - Everyone Please Read

I am a Broadcom employee. Broadcom makes cable modem chipsets. Some of these chipsets have a slight design flaw. I am not at liberty to divulge any technical details. However, I can tell you that using a cable modem containing one of these chipsets with your Mac will result in slow internet speeds. Apple is not at fault. I'm sorry to say that fixing these design flaws, which only affect Mac users is not a priority at this time.
I am a Mac user myself and am just as frustrated as you are with incompatible products. This is why I am coming forward and informing you of this problem with our products. Our chipsets are used in almost all of the most popular cable modems. I am including a partial list of the most recent and popular cable modems that use our chipsets which have this problem. I am unable to find any information about older and less popular cable modems. Please understand that I can not and will not divulge any more information. Thank you.
All Linksys Cable Modems
All Motorola Cable Modems except for the SB5120
All Scientific Atlanta Cable Modems

Maybe Broadcom can answer the question as to why the Cable modems are slower with Macs with cable modems that do not have TurboDOX.
I have spent hours on numerous forums reading many users complaints and many users solutions from changing DNS to using certain modems.
What I have found is this. All and EVERY cable modem that people have references as working at full speeds on a Mac had 1 thing in common. This 1 this is TurboDOX. I have just completed about four locations where the Macs were slow with Comcast Cable modems. The latest being today with a new installation with a new SB5101 modem. I had the client go and buy a new SB5120 instead. The speed with the 5101 was 2-3Mbps and the speed with the 5120 was 18Mbps!!! yes, 18.
So the question is Why does TurboDOX make a difference with the Mac and not the PC????
Also, another thing to note is that some routers cap the WAN to LAN interface at 6Mbps. For example, the COMSUMER grade Netgear routers (usually the silver plastic ones) are capped at 6, however the Business class routers have varying WAN to LAN speeds ranging from 15Mbps to over 50Mbps.
Our setups for residential clients include either the Netgear FVS114P or the FWG114P VPN Firewall Routers. I have had no issues with Macs being slow with either of these routers and a Motorola SB5120.
FWIW.
And about the Design Flaw theory, Why did this speed issue just start appearing recently? I saw a site test fine at 6Mbps when it first was installed then recently when we went back to do some work find it testing between 1-3Mbps. Just Odd.

Slow connection - Cable modem

All the topics discussing slow connection problems seem to include wireless equipment. I use an ordinary cable connection with external modem & 5Mb per second service from my cable company.
About a week ago, surfing different websites became extremely slow.
Loading this page to begin typing my thread took about 20 seconds. The status bar will go to about 30-40% immediately then hang for about 15-20 seconds before fully loading the page. Same with all websites no matter the time of day. The speedcheck gives numbers for downloads - 4.63 and 536.59 for uploads. Clearly, the modem is doing its job.
I emptied the history, cleared cookies but that's all my limited experience allows me to do on my own. Any ideas?

When you used one of the speedtest websites to check throughput, was that before or after clearing the browser's cache? Some bandwidth test sites (most of them, I think) store the results in the browser's cache, and if you forget to clear the cache before re-running the test, you can be temporarily dazzled by the immense increase in throughput! The "4.63" for downloads was Mbps, right? And this problem started in the last week or so, with performance before then being acceptable?
In System Preferences> Network, under the TCP/IP tab, do you have explicit DNS server IP numbers entered or is the box left blank? Since you're getting partial page loads before stalling, I don't think it's a cse of an ISP telling users to enter explicit IP DNS numbers, then changing their DNS servers without notice (that happened to me), but if you do have explicit DNS numbers in that box, note the numbers then try clearing the box to see if that makes a difference (a blank DNS server box pushes DNS request back to the ISP's servers, which should always respond with up-to-date server links).
Another unlikely-but-possible scenario (which also happened to me) is if your ISP changed their cable modem server hardware (e.g. from DOCSIS 1.0 to DOCSIS 2.0) without bothering to notify their customers. That caused random disconnects and inexplicable stalls seemingly at random when my ISP pulled that stunt. Calls to the ISP's national support center were no help; a chance remark by s counter worker while in the brick-and-mortar local cable company office elicited information about the change. That you bought a brand-new modem suggests your modem should be fully compliant with any current server hardware. However, there are known to be some incompatible and worse some partially-compatible modem brands that don't work properly under OS X --- even different model numbers in the same modem family (e.g. Motorola Surfboard) make a difference.
What manufacturer and model cable modem are you using? Try calling your cable company's local office and ask them when make/model modems are they handing out to new customers who rent their modems, also ask if the local people are aware of any recent server hardware or local cabling changes (they haven't been tearing up your street to install FiOS, have they?). The ISP's support website should have a list, which should also be available from the local cable office, of modem manufactures/brands that they've approved as compatible; while that list is invariably Windows-centric, it's still a good idea to stick to those makes and models.
If the ISP has tweaked things recently, you may be able to use the modem you already have by tweaking the MTU (maximum transmission unit) value from the usual value of 1500 to say 1420. You can do that manually in System Preferences> Network> Show: Built-in Ethernet> Ethernet tab --> Configure: manually (advanced) and changing the Maximum Packet Size (MTU) value.
IE is a dog under any conditions; try using Firefox instead as an independent check on Safari. There have been the usual reports of some users having problems with the new 2.0 release of Firefox (and others reporting wonderful things about it); you can try the stable 1.5.0.8 release from Mozilla's Firefox releases archive.

Internet connection slows down after a while

I have a wrt160n connected to an arris cable modem. When I set it up it works fine - after a period of hours the internet connection slows down a lot. If I then connect my computer directly to the modem it is is fast again. But to get the signal to the router working fast again I have to reset the modem and power cycle the router. Is there a conflict - is my router rationing access or what?

You should download and upgrade/flash your router's firmware...
Download the Firmware from here
Follow these steps to upgrade the firmware on the device : -
Open an Internet Explorer browser page on a computer hard wired to the router...
In the address bar type - 192.168.1.1...Leave the Username blank & in Password use admin in lower case...
Click on the 'Administration' tab- Then click on the 'Firmware Upgrade' sub tab- Here click on 'Browse' and browse the .bin firmware file and click on "Upgrade"...
Wait for few seconds until it shows that "Upgrade is successful" After the firmware upgrade, click on "Reboot" and you will be returned back to the same page OR it will say "Page cannot be displayed".
Now reset your router :
Press and hold the reset button for 30 seconds...Release the reset button...Unplug the power cable from your router, wait for 30 seconds and re-connect the power cable...Now re-configure your router...
If your Internet Service Providor is Cable follow this link
If your Internet Service Providor is DSL follow this link
Open an Internet Explorer browser page on your wired computer(desktop).In the address bar type - 192.168.1.1 and press Enter...Leave Username blank & in Password use admin in lower case...
On the set-up tab change the MTU Size to 1350 and click Save Settings...
For Wireless Settings, please do the following : -
Click on the Wireless tab
- Here select manual configuration...Wireless Network mode should be mixed...
- Provide a unique name in the Wireless Network Name (SSID) box in order to differentiate your network from your neighbours network...
- Set the Radio Band to Standard-20MHz and change the Standard channel to 11-2.462GHz...Wireless SSID broadcast should be Enabled and then click on Save Settings...
Please make a note of Wireless Network Name (SSID) as this is the Network Identifier...
For Wireless Security : -
Click on the Sub tab under Wireless > Wireless Security...
Change the Wireless security mode to WEP, Encryption should be 64 bit.Leave the passphrase blank, don't type in anything...
Under WEP Key 1 type in any 10 numbers please(numbers only and no letters eg: your 10 digit phone number) and click on save settings...
Please make a note of WEP Key 1 as this is the Security Key for the Wireless Network...
Click on Advanced Wireless Settings
Change the Beacon Interval to 75 >>Change the Fragmentation Threshold to 2304, Change the RTS Threshold to 2304 >>Click on "Save Settings"...
Now see if you can locate your Wireless Network and attempt to connect...

I don't have a DSL or cable modem to access the Internet ... just a mobile WiFi (there is no cable available at our house). How do I connect my Time Capsule to the Internet via the mobile WiFi?

I don't have a DSL or cable modem to access the Internet ... just a mobile WiFi (there is no cable available at our house and the mobile WiFi is our only option). How do I connect my Time Capsule to the Internet via the mobile WiFi?

LOL!!
I am in Australia and the ISP... I think both the main ones would fit your description to a T.. big T in particular.
Your router is really unsuitable.. if it is only wireless and no ethernet.. just buy an ethernet one.
Do a search on ebay.. 3g router.
But you can get the TC to join a wireless network.
It is a non-standard setup that Apple will not support.. the option is hidden.
If you are on Lion download the 5.6 utility. Go to the wireless set up page and hold down the option key whilst selecting wireless mode.. a new option, join will appear. You can then put in the ssid and passkey of the 3g router.
But please note the end result of this setup..
very slow speed. The TC is now a second wireless hop from your clients.. this will halve the speed.
In this mode the ethernet are deactived.. for reasons only Apple know, they decided you should not use ethernet when doing this.

Internet speeds keep slowing down to a crawl

I'm having a problem that has only developed in the past week which was during a time when I haven't changed any configurations in that period of time since my son was born a week ago yesterday and I obviously had more important things to do than mess with my network configurations. However, about 2 weeks prior to his birth, in the process of configuring a baby monitoring system with icam source, 3 weeks or so ago, I read that I might be able to improve my internet performance, I ran googles namebench a couple of times and added and re-ordered the DNS servers that had been listed prior to any problems developing based on its' reports. My internet speeds improved as a result of changing those DNS settings and stayed good until the past week. But of course, we now need to use the computer as part of our baby monitoring system and it's not working worth a **** and I'm getting frustrated since I can't put my finger on the problem and I don't really have time to spin around in circles right now. I'm sure it's probably something simple and I can't put my finger on it though. Sleep deprivation is new to me.......
I've kept running log of notes so this is a little deshoveled but I figured the more information I provide the better the chance someone might help me get this solved quickly.
In the last week, since my sons birth, my internet speeds would be okay after restarts and resetting everything, 2.5 Mbps or so but after a 10-15 minutes it starts to slow down to .2-.3 Mbps. I went thru all my network settings, restarted everything, repaired permissions, I've changed ethernet cables reset PRAM, firewall is running, stealth mode enabled, allow signed software incoming connections and my various other programs such as netsessionmac4f3c6b, skype, java, itunes, etc.
All sharing services off and pretty basic login items at startup including growl.
I had AT&T come out and check my DSL line and everything checked out on their end up to and out of the DSL modem based in their equipment tests.
The problem seems to start when I connect my imac (a fairly loaded 27" imac I got in Dec.) First off, as soon as the imac is connected to the modem via ethernet, the old ethernet modem flashes and continues to flash, even right after startup. So the tech thought something was running in the background and I can't figure out what. I looked through login items but don't see anything that would be a problem and am afraid to eliminate everything.
So I created a guest account to eliminate any login items (I think) and in I got 5.69 Mbps right off the bat. But after a minute or two, without changing anything my download speed slows down and I get for example .77 Mbps. The same thing happens with my administrator account on the imac. Fast speeds at startup and more importantly if I change the configuration by switching between ethernet and airport, I get fast speeds right after changing the configuration but after a minute or two I am well below 1.0 Mbps. I've got several network configurations with automatic, airport and ethernet set up in different ways including a clean ethernet connection with the original DNS settings.
I haven't set up an airport only account but that really isn't the way I want to hook up the computer that sits right next to the modem and runs my network. Restarting the old modem and direct connecting the computer to the modem results in the same thing happening.
I connected my ethernet from the (old?) modem directly to my ancient powerbook G4 and I got +5.6 Mbps download but it also slowed down to 300 kbps after 5 minutes or so the first time (old modem?)
Now to explain why I have "old?" listed above. I was then able to get a new DSL modem from AT&T, hook it up just fine, get enormously faster internet service in the 5,000 kbps only to have it slow back down to around 300 kpbs after connected for several minutes.
directly connected to imac-bypassing router
3,500 kbps
after 15 minutes-250 kbps
connected to imac thru router/time capsule with airport extreme
2500 kbps
after 15 minutes=166 kbps
directly connected to an older powerbook G4 with new modem
IP address of 192.168.1.64
5.65 Mbps on speedtest
after 15 minutes=5.67 Mbps
after 30 minutes= 5.59 Mbps
1 hour-5.66 Mbps
Very solid, stable readings for what I am used to. This would seem to isolate the problem to the imac.
directly connected to imac with new modem
IP address of 192.168.1.64
5.8 Mbps on speedtest
after 30 minutes= .60 Mbps-ping takes 250 ms
1 hour= .46 Mbps-ping takes 250 ms
Now a problem that only started last night after I hooked up the new modem and started up my old Time capsule/airport configuration, I got a message that said something to effect of "another device on this network is using computer IP address 192.168.1.64. So I tried manually changing last digit of the IP address on the computer to one number higher and it kept saying the start and end range were incorrect so I shut the airport station down since when it was connected, it would not allow the computer to connect thru the router via ethernet. I did a hard reset on the airport and I got it back up and running just fine but the internet speeds on the imacs' ethernet connections are so slow it's practically worthless. I also checked to see what was connected to my airport on any given occasion, 2 iphones, 2 pads, another imac running upstairs and a newer powerbook running icam source that is supposed to be the baby monitor. Except for the laptop everything can use "802.11n" but the powerbook only connects via 802.11g so I have set the airport to that limiting setting.
Any suggestions? Is there a way for me to log what is happening so I can report in more detail?

First thing is to check if the wireless is on a sensible channel: HomeHub doesn't always make sensible choices. Install inSSIDer on your laptop and see what other devices there are around and if there is any clash. Also, try moving the HomeHub around a little, even quite small differences can make a big difference to wireless signals.
You could run an ethernet cable from downstairs to upstairs. Easy to do, but can be a bit unsightly. If most of your devices are upstairs, you could use this cable to connect the modem to the HomeHub. If you have devices both up and down, you may want to keep the HomeHub downstairs and add a switch upstairs.
HomePlug may be suitable for you. If you search Amazon for HomePlug you will see a couple of kits for just over £30. Don't go for an 85Mbps one. A 200Mbps such as the TP-link or D-Link should be much better than wireless, but not as good as a cable.
Depending excatly how many devices you want to connect and where, you can pay more and have a builtin wireless at one end: http://www.amazon.co.uk/Devolo-1408-Wireless-N-HomePlug-Adapter/dp/B00472MMCQ/ref=sr_1_15?ie=UTF8&qi... Or it may be best for you to use the basic devices and add an old wireless router in switch mode.

WRT160N cable modem slowing down

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