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mrschultz02

join:2007-09-10
Media, PA

1 edit
reply to Melissa2009B

Re: [Speed] May have to switch to Comcast

said by Melissa2009B:

I tried googling them and was still a little confused. So the cable modem hooks up to the cable, and the router goes into that somehow ( wired or wirelessly? ) and then you route all your home devices through the router?

But doesn't that just add another speed bump or something to fail?

What everyone is saying is that an "all-in-one" modem+router+wifi unit is usually not as good as separate boxes. You already said the house might need a more powerful wireless transmitter so you would be better off renting just the modem from Comcast and getting your own wireless router.

So you would have 2 boxes sitting next to each other. The cable from the street would go to the Comcast modem, then a short Ethernet cable from the modem to the wireless router that you would buy and set up. If you get phone then there would be a phone jack on the Comcast modem.

The connection between a new modem and a new router would be minimum 100Mbps and most likely 1Gbps so no problem with it being a speed bump.

Oh, and as for another thing that might fail, the odds of one box going bad are pretty much the same as if you got an all-in-one and part of it going bad. Also you can replace or upgrade your own router as your needs change. If you get an all-in-one from Comcast your are stuck with what they give you.

Melissa2009B

join:2009-12-27
Denver, CO

2 edits
Great, thanks!

Edit: I'm looking around and see recommendations for a Docsis 3 modem and Wireless N router.

Look at this in a refurb:

»www.amazon.com/NetGear-WNR3500L-···-catcorr

Now I'm getting somewhere. Just called Comcast and they gave me:
»mydeviceinfo.comcast.net/

mrschultz02

join:2007-09-10
Media, PA
Are you getting phone service as well or did you change your mind on that? Also are you getting residential or business class service?

If getting phone service I'd rent the modem from Comcast since they will replace it if there is a problem. If getting only internet now but adding phone later you'll need to decide if you want to get your own modem now that can do phone so you don't have to replace it. (a normal modem doesn't have the phone jack)

As for that router, it looks OK, although I prefer ones with external antenna. Everyone will suggest different ones, I've had good luck with Buffalo:

»www.amazon.com/Buffalo-Technolog···9&sr=1-2

Melissa2009B

join:2009-12-27
Denver, CO
Gonna try the phone service too, and we're getting the Blast! residential service, so it appears I need a DOCSIS 3.0 Telephony Modem from that recommended list? Or will any DOCSIS 3.0 Telephony Modem do?

That router looks like a fantastic deal though, but will I ever need everything it can do? Doubt it. I don't even know what all that stuff is, they say it can do. LOL!

Here's something on the Rangemax. It doesn't appear to suffer from lack of external antenna:

»support.netgear.com/app/answers/···chnology

mrschultz02

join:2007-09-10
Media, PA
said by Melissa2009B:

Gonna try the phone service too, and we're getting the Blast! residential service, so it appears I need a DOCSIS 3.0 Telephony Modem from that recommended list? Or will any DOCSIS 3.0 Telephony Modem do?

You'll need a telephony one from that approved list. Since this is a new install maybe you should rent at first and then buy your own later to avoid the $7 a month rental fee. Especially since this is a new install, let them get everything working and if there are problems they can't tell you it's your modem that is at fault.

That router looks like a fantastic deal though, but will I ever need everything it can do? Doubt it. I don't even know what all that stuff is, they say it can do. LOL!

Well, you don't need to use all the features, but it should have the power to reach everywhere in your house. And it's new with a 3 year warranty, I didn't see what the warranty was on the refurb that was only $12 cheaper.

Melissa2009B

join:2009-12-27
Denver, CO
Just found a good price on the Arris TM822G Touchstone® DOCSIS 3.0 8x4 Ultra-High Speed Telephony Modem, at Amazon, but some people up until just recently said that Comcast won't activate it, then one said they can now.

That refurbed router with RangeMax says it can reach 500 feet.

mrschultz02

join:2007-09-10
Media, PA
Just looked on Amazon for that modem, only available from 3rd party sellers and they look shady.

If you like that router go ahead, you could get it now, set it up by plugging it into your DSL setup and get everything connected to it, then when Comcast is installed plug the router into the cable modem. That's what I did when switching from DSL to Comcast HSI, made the switch pretty quick and seamless.


NetFixer
Bah Humbug
Premium
join:2004-06-24
The Boro
Reviews:
·Cingular Wireless
·Comcast Business..
·Vonage
reply to Melissa2009B
said by Melissa2009B:

Just found a good price on the Arris TM822G Touchstone® DOCSIS 3.0 8x4 Ultra-High Speed Telephony Modem, at Amazon, but some people up until just recently said that Comcast won't activate it, then one said they can now.

That refurbed router with RangeMax says it can reach 500 feet.

Comcast only allows user owned telephony modems that are purchased from one of their authorized dealers (I think Bestbuy is one, but I doubt that Amazon is). As others have suggested, you may want to try using a Comcast supplied telephony modem first, and let the install tech get everything working properly with that modem. You can always replace it later with your own telephony modem from an authorized dealer to save the $7.00 per month equipment rental fee (and yes, Comcast can know if it was purchased from an authorized dealer by the serial number and the MAC address). The reason for that suggestion is that if you start out with your own modem, and there is any problem at all during the install, guess where Comcast is going to place the blame?
--
History does not long entrust the care of freedom to the weak or the timid.
-- Dwight D. Eisenhower

Melissa2009B

join:2009-12-27
Denver, CO
Oh ok, good idea. And if it works great, I may as well just buy one exactly like it and replace it.

Thanks!


PeteC2
Got Mouse?
Premium,MVM
join:2002-01-20
Bristol, CT
kudos:6
Reviews:
·Comcast
Melissa, not to complicate things (just the opposite) - a few "points?"

1. If you are getting internet only then bying your own modem makes a lot of sense. Buy either the Zoom 5341J (best recommendation) or the Motorola SB6121 (very close second). At any rate, you only want a Docsis 3.0 modem, and yes, it needs to be on Comcast's approved list. (even if someone says it "should" work...even if they are from Comcast...take that with a grain of salt!)

2. If you are going to get voice and internet...rent Comcast's eMTA modem...buying is very, very limited, and it is at best a crapshoot that you will save any money over renting. BTW, there is no guarantee that the Arris TM822g can be provisioned for Comcast. The only user-owned eMTA currently allowed is the Arris TM722G, and only if bought from an authorized Comcast re-seller such as select Best Buy stores - and it really is not all that good a deal.

3. Whether you go "wireless" or not, Comcast hooks you up to one cable entry point...there will be no additional cabling supplied past that point.

4. As you have already run your own network, setting up one for a Comcast connection is duck soup! As they say "So easy, even a cave man (woman) could do it!"

5. Along that line: I recommend avoiding refurb routers. Yes, you will spend a few more bucks on a new router, but keep in mind what an important role that router plays in your network (precisely why wireless gateways are such losers!). You have a lot of info flowing through your network for internet access, t.v. and movies, etc. If you want an absolute no-brainer, quality set up, consider the Linksys EA2700, 3500, or 4500 routers. Just my opinion, but do it once, do it right, and you will have no regrets later.

I know, logic would make you think that a single device such as a wireless gateway would simplify your set up and ensure more stable operation, being one less device in the chain...it is just the opposite!

If you stick with a separate modem (or eMTA if you have voice) and a stand alone router, you will find that you have better range, easier trouble-shooting if you do ever have an issue, and all around better flexibility to get the best set up for your home environment.
--
Deeds, not words

Melissa2009B

join:2009-12-27
Denver, CO
Pete,

I guess I resent that they only have a list of very old modems that are "approved" AND I have to buy them only at absolute retail price from an "approved" dealer? Sounds like they're trying as hard as they can, to make it where you HAVE to rent from them instead of buying. Yes, the prices on their older model "approved" modems may be quadruple what something like that TM822g sells for. What a coincidence.

Well if a cave man could do it, maybe a 63 year old electronics tech could even do it. LOL

And yes on the router! BUT it appears from the reviews, that in this one case ( NetGear WNR3500L-100NAS Rangemax Wireless-N Gigabit Router with USB (Factory Refurbished) ), you're getting new and wonderful guts in a refurbed router AND the Rangemax apparently means a 500 foot range, without an external antenna! Whoa!

So if I want that router, and voice, I guess I just rent their darned modem and use my own router like this one.

Melissa2009B

join:2009-12-27
Denver, CO

1 edit
I called Comcast. Bless them, they're open 24/7 here in Denver.
They said I don't have to buy from an authorized dealer, just make sure not to buy a used one where someone hasn't paid their bill and it cant be activated, so only buy new and from their list. If it's not on their list and I call for troubleshooting, I'm SOL. So that's good to know.

So I just spent half an hour calling Best Buy and getting transferred all over the place. It seems that they don't carry Comcast modems in all their stores and only one store in the area has a Comcast specialist. I called that store, she was busy, but will call me back.

But one guy said I need to make sure that whatever modem I get, not only has voice, but battery backup for it, so we don't lose phones if the power goes out. hadn't thought of that. Now I need to find one on their list that does all that.

On their list at »mydeviceinfo.comcast.net/
what do IMS NCS or SIP mean?

I cant reach the "Specialist" at Best Buy, she won't call me back. I cant deal with them, which is why I never shop there.

Can someone please recommend a good lower cost readily available modem with voice and L-ion backup battery, from the above list?


NetFixer
Bah Humbug
Premium
join:2004-06-24
The Boro
Reviews:
·Cingular Wireless
·Comcast Business..
·Vonage

1 edit
The information you got from the Comcast rep likely only applies to standard cable modems, not to emta voice modems (and that has always been true for standard cable modems). Unless Comcast has very, very recently changed their policy, you can only use an emta voice modem with their CDV service if you obtain it from them, or from one of their authorized resellers (such as Bestbuy..and as you have found out, not all Bestbuy stores are authorized Comcast resellers).

I think that most (if not all) emta modems come with an internal battery backup, but even if you found one that you can use that does not have an internal battery backup, you can always use an external UPS* device to power it. I have several UPS boxes for all of my modems, routers, switches, servers, cordless phone base station, etc, and I keep a charged spare UPS and several charged spare batteries.

* Uninterruptible Power Source
--
History does not long entrust the care of freedom to the weak or the timid.
-- Dwight D. Eisenhower

Melissa2009B

join:2009-12-27
Denver, CO
Yeah that's true, and yes I know what a UPS is. LOL

Don't know what EMTA is though, just that I seem to need one...


NetFixer
Bah Humbug
Premium
join:2004-06-24
The Boro
Reviews:
·Cingular Wireless
·Comcast Business..
·Vonage

1 edit
said by Melissa2009B:

Yeah that's true, and yes I know what a UPS is. LOL

Don't know what EMTA is though, just that I seem to need one...

Sorry, I thought that acronym had already been defined in this thread

EMTA = Embedded Multimedia Terminal Adapter

And here are definitions for some of the other acronyms from your previous post that you added after I replied:

IMS = IP Multimedia Subsystem

SIP = Session Initiation Protocol

This one may or may not apply to your question; it would help to know exactly where you saw the acronym used:

NCS = Network Control System

EDIT: Damn, my links keep disappearing, hopefully they are all still there now.
--
History does not long entrust the care of freedom to the weak or the timid.
-- Dwight D. Eisenhower

NightOwl2

join:2012-03-19
reply to Melissa2009B
(Embedded-Multimedia Terminal Adapter) A device that combines a DOCSIS cable modem and analog telephone adapter. The cable modem provides the data interface, and the telephone adapter provides the voice over IP (VoIP) interface for one or more analog telephones. The terminal adapter provides the conversion between analog voice signals and IP packets, delivers dial tone and manages the call setup.

I second NetFixer's and mrs schultz's advice. Go with the Comcast supplied EMTA for the install. There's plenty of time to purchase one later, after everything is running smoothly.

Melissa2009B

join:2009-12-27
Denver, CO
Thanks. I just called Comcast tech supt and they told me emta just means it does data and voice. Duh, huh?

They said that on their list, they recommend the TM722G and the SMCD3G-CCR, which would probably be the ones they'd bring out and install if I have them do it. Yay!


NetFixer
Bah Humbug
Premium
join:2004-06-24
The Boro
Reviews:
·Cingular Wireless
·Comcast Business..
·Vonage

1 edit
said by Melissa2009B:

Thanks. I just called Comcast tech supt and they told me emta just means it does data and voice. Duh, huh?

They said that on their list, they recommend the TM722G and the SMCD3G-CCR, which would probably be the ones they'd bring out and install if I have them do it. Yay!

Did you decide to go with the business class service after all?

The SMCD3G-CCR is their business class (non-wireless) gateway router, and I have never seen it used for a residential install. If you are still going to get the residential service, the TM722G by itself (along with your own NAT router) should be all you would need.

FWIW, some users have had problems using the SMCD3G-CCR with dynamic IP address accounts (its NAT implementation does have some problems with some applications, and it works best with static IP accounts, with another better quality NAT router behind it). Having given the obligatory SMCD3G-CCR warning message, allow me to say that I use mine both ways. I have some devices behind my SMCD3G-CCR using public static IP addresses directly, I have another NAT router (with a public static IP on its WAN) for most of my non-server devices, and I use the SMCD3G's NAT in front of my Vonage VoIP router (just so that particular IP address is not wasted)
--
History does not long entrust the care of freedom to the weak or the timid.
-- Dwight D. Eisenhower

Melissa2009B

join:2009-12-27
Denver, CO

2 edits
Oh ok, didn't know that. No I'm doing their Blast residential service.

Just talked to them. If I want them to install the equipment too, they will only install the gateway, not separate modem / router.

So I gotta decide - either buy my own TM 722G and wireless router, or accept their wireless gateway. AND if the router isn't theirs, they won't support that either, if I have problems.

Melissa2009B

join:2009-12-27
Denver, CO
Looks like we have to rethink this whole thing now. I just called to make sure everything was lined up for next Friday and the woman I talked to earlier was seeing if they could lock in some 6 month price breaks for us. Well now it turned out that they reneged on the whole price break deal. This rep just told me that they "have no promotions" and will be charging $120 a month for HSI and voice, which is $30 more than we even pay CenturyLink for phone and DSL now! And no 6 month break, right from the start!

This stinks!

mrschultz02

join:2007-09-10
Media, PA
No promotions at all or just for Blast? If you just want to stream HD you would do fine on Performance (16/2 here). There's almost always a promotion on for that level.

Melissa2009B

join:2009-12-27
Denver, CO

2 edits
Not sure what 16/2 is.

They told me they have 3 meg service and 20-24meg service ( the Blast ) and that's it. ( Oh, they said they have 12 meg service too, but it isn't fast enough for streaming movies. Huh? ) They told me I need 20-24 megs to do streaming movies, which sounds weird.

I've been watching streaming HDTV on 3 megs, though it's a pain because it skips at times. But CenturyLink told me all I need is 5 megs for streaming HDTV, which they cant provide here because of old phone lines. So I THOUGHT even 5 megs from Comcast would do it, but they say we need 20 megs for streaming movies in HD. Something sounds wrong somewhere, but I just canceled the install.

After all this trouble, no promotions and $120 a month?!

We pay $90 a month now, with tax, for phone & DSL with CenturyLink.

It was a mistake to think we could try Comcast again.

Update:

This is insane. I started digging at their site:

Performance - Special Offer

Get download speeds up to 20 Mbps and uploads up to 4 Mbps with PowerBoost®!

Download music, share photos, and stream video clips at super fast speeds.

XFINITY is the fastest Internet provider in the nation according to PC Mag!
Constant Guard™ - the most comprehensive online protection (a $360 value). Get Norton™ Security Suite and much more.
XFINITY Connect with 7 e-mail accounts, each with 10GB of storage.
More than 3,500 live games on xfinity.com/espn3.
Backed by the 30-Day Money-Back Comcast Customer Guarantee.

***This special price is for new customers who currently aren't subscribed to any XFINITY services.***

Special Offer!
$29.99 per month
for the first 6 months

So WTF ( what the frack ) guys?!

This is just nuts dealing with these people!

I called back the local office and told them about this and they said I'd have to buy it online then, because they don't have access to any promotions at this office. This is like dealing with Dr. StrangeLove, where the left hand doesn't know what the right hand is even doing.

Melissa2009B

join:2009-12-27
Denver, CO

1 edit
OK, are you ready for bizarro? This has been like dealing with a different planet! Here's my chat logs just now, with their agent!:

Chat log from 5-27-12 around 9 PM

Chris: Thank you for answering my questions. Based on the information you have provided, the Performance - Special Offer would suit your needs.

You: They said we could get HSI with no contract, and even add voice to it

Chris: The Performance plan is a great upgrade from DSL, and it offers value with faster Internet speeds so you can enjoy chatting with friends and downloading your favorite music and movies!Chris: Our Performance plan gives you up to 20 Mbps downloads with up to 4 Mbps upload with PowerBoost.

Chris: Our Performance Internet at this time has a promotion for the first 6 months at $29.99/month for New Customers!

Chris: When you continue using our Performance Internet from months 7 - 12 the pricing would be $44.99/month.

Chris: From months 13 and on the pricing of our Performance Internet is around $62.95/month stand alone.

Chris: The good thing about this plan is that it is not under contract which gives you the flexibility to modify your plan anytime and still take advantage of this offer while it is still available.

Chris: How does that sound?

Chris: May I ask if you usually make long distance calls or calls outside of the U.S?

You: We make LD calls, but not outside the U.S.
You: Usually under 200 minutes a month

Chris: Thank you for answering my questions. Based on the information you have provided, I would recommend our Performance Internet & XFINITY Unlimited bundle.

Chris: This bundle includes Performance Internet service (download speeds up to 20mbps and upload speeds up to 4mbps with PowerBoost) and our Comcast Unlimited phone service.

You: ok...

Chris: With the XFINITY Unlimited plan, you will receive unlimited local and long distance calling including 12 popular calling features for one flat monthly rate.

Chris: Unlimited local and long distance calling will include the U.S., Puerto Rico, U.S. Virgin Islands, Guam, Canada and certain other U.S. territories.Chris: Our Performance Internet with Xfinity Unlimited plan is $39.99/month for the first 12 months with a 2 year contract.

Chris: After the first 12 months, monthly charges are $59.99/month for months 13-24.
Chris: After 24 months, regular rates apply and is around $94.90 - $96.90/month depending on the area.

Chris: How does that sound?

You: Wonderful!

Chris: Let's go ahead and get you started.

Chris: What questions can I answer for you before we get started with the order process?

You: From what I found out from your local people, they'd come over & install a internet/voice gateway. We need wireless to all these devices, the 2 PC's and 2 rokus

You: How much is install?

Chris: There is a one-time installation fee of around $34.99 for professional installation.

Chris: Your installation includes our professional technician setting up both services.

You: Wow! For wireless like this? Again the local people were telling me much more

Chris: An EMTA modem device will be required for Digital Voice service and needs to be connected your cable outlet.

Chris: This fee covers the cost of setting up the EMTA Modem in your home and testing your phones.

You: great!

Chris: You would need to lease our modem for only $7 a month to lease our XFINITY Wireless Gateway which includes a router, cable modem and voice adapter in one device.

Chris: It allows multiple devices in the house to access the Internet at the same time with reliably fast speeds!

Chris: What additional questions can I answer for you before we get started with the order process?

You: yes I know, thanks
__________

CONCLUSION: DO NOT, REPEAT NOT DEAL WITH THEIR LOCAL OFFICE, ONLY ORDER ONLINE!!!

mrschultz02

join:2007-09-10
Media, PA
said by Melissa2009B:

CONCLUSION: DO NOT, REPEAT NOT DEAL WITH THEIR LOCAL OFFICE, ONLY ORDER ONLINE!!!

That's just the way it is for a lot of stuff now, especially with these gigantic corporations. Many promotions and the best deals you can only get online.

The 20Mbps download / 4Mbps upload speeds listed are for powerboost that kicks in for the first 20MB. For large files and streaming it will probably be 16 down / 2 up sustained speeds. That's still enough to stream 2 HD movies simultaneously and have some extra for web surfing, an HD Netflix stream only runs about 5-6Mbps. Even for the best Vudu HDX 1080 streams 9Mbps is what you need.

Melissa2009B

join:2009-12-27
Denver, CO
I've decided to sign up only for the HSI now, as it's without a contract. That's a nice bundle they offer with voice, but it's with contract too. Oh well. Keep CenturyLink for voice.

BUT for the future, I'm thinking I might could get the TM 722G modem and have EMTA capability for the future. Or a Zoom 5341J?

And then add the wireless router.


tshirt
Premium
join:2004-07-11
Snohomish, WA
kudos:5
That's a good plan and it's easy to upgrade as needed.


PeteC2
Got Mouse?
Premium,MVM
join:2002-01-20
Bristol, CT
kudos:6
Reviews:
·Comcast
reply to Melissa2009B
said by Melissa2009B:

I've decided to sign up only for the HSI now, as it's without a contract. That's a nice bundle they offer with voice, but it's with contract too. Oh well. Keep CenturyLink for voice.

BUT for the future, I'm thinking I might could get the TM 722G modem and have EMTA capability for the future. Or a Zoom 5341J?

And then add the wireless router.

You need wireless right away for your Roku and such, yes?

It makes no sense to get their wireless gateway - you wil not get good range on it - check out the Comcast forums on router issues...

If you want to rent their modem...ok, but you still need a router.

If you think that you may go Comcast voice in the near future, I'd stick with renting the modem, otherwise buy your own.

BTW, I recently got Comcast internet and voice at the performance tier (20Mbps down/4Mbps up with speedboost) and am not on a contract. (plenty of speed for multiple users & Roku/Netflix)

Earlier advice about getting any used modems is incorrect! You simply do not know if what you are getting will be provisioned by Comcast or not! Many of the used modems out there are stolen, there is no assurance that you can receive that ensures the modem will be useable. No one is going to tell you that they are selling a stolen modem after all...

As far as eMTAs, unless Comcast has re-set their eMTA policy, no, you can not just buy an eMTA any old place and expect Comcast to provision it...regular cable modems of course are much less stringent. They have to be from their "approved list" not for any nefarious reason, but they have to be specifically programmed for. Yes, Comcast reps sometimes are all over the place when asking them these questions, so beware.

Refurb routers? Pay your money and take your chances, but they were "refurbed" for a reason...they absolutely do not "replace the insides"...they would throw them away first! A refurbed router is essentially checked for proper firmware flash, tested briefly, prettied up, and put in a new box. No manufacturer actually repairs routers, there is no money in it. Sometimes you luck out and it was just a bad power brick, and often it was just user-error that was the problem...but otherwise refurb routers are in precisely the same condition as when they were returned.

They may be "ok", but they are not "good as new". Your router is the distribution point for all your on line data throughout your house, it usually is on 24/7/365...for that, I would want more than "ok".

PS - Your conversation with Chris sounds good. The prices and set-up described is spot on, and he sounds knowledgeable. I have found that not all Comcast reps are equally aware of their own products and policies
--
Deeds, not words

Melissa2009B

join:2009-12-27
Denver, CO
said by PeteC2:

said by Melissa2009B:

I've decided to sign up only for the HSI now, as it's without a contract. That's a nice bundle they offer with voice, but it's with contract too. Oh well. Keep CenturyLink for voice.

BUT for the future, I'm thinking I might could get the TM 722G modem and have EMTA capability for the future. Or a Zoom 5341J?

And then add the wireless router.

You need wireless right away for your Roku and such, yes?

Yes.

It makes no sense to get their wireless gateway - you will not get good range on it - check out the Comcast forums on router issues...

I understood that before, and would rather follow the advice here and get a modem and router and not have to rent.

If you want to rent their modem...ok, but you still need a router.

I mentioned that I found on Amazon.com, the NetGear WNR3500L-100NAS Rangemax Wireless-N Gigabit Router, which they say has a 500 foot range, for $33.

If you think that you may go Comcast voice in the near future, I'd stick with renting the modem, otherwise buy your own.

It doesn't look promising. They won't give any breaks on bundling, unless we do a 2 year contract, and we don't want contracts right now, because as I mentioned, we're expecting a global economic collapse at any time now.

BTW, I recently got Comcast internet and voice at the performance tier (20Mbps down/4Mbps up with speedboost) and am not on a contract. (plenty of speed for multiple users & Roku/Netflix)

How did you get them to do it without contract, unless you paid a bunch more? I mean, I could pay full price and have no contract on both of them, but it would be $120 a month, which is $30 more than CenturyLink's DSL and land line.

Earlier advice about getting any used modems is incorrect! You simply do not know if what you are getting will be provisioned by Comcast or not! Many of the used modems out there are stolen, there is no assurance that you can receive that ensures the modem will be useable. No one is going to tell you that they are selling a stolen modem after all...

Agreed.

As far as eMTAs, unless Comcast has re-set their eMTA policy, no, you can not just buy an eMTA any old place and expect Comcast to provision it...

They tell me I can. I talked to them about the TM 722G. As long as it's on their list and unlocked, they said fine. This is where I'm afraid of traps with them. They're a big corp and obviously the right hand doesn't even know what the left is doing, so they could very well tell me OK on this, and then not allow it, in which case I'd be furious at them. ( not that they would care )

regular cable modems of course are much less stringent. They have to be from their "approved list" not for any nefarious reason, but they have to be specifically programmed for. Yes, Comcast reps sometimes are all over the place when asking them these questions, so beware.

The TM 722G is on their list and the claim it's supported.

Refurb routers? Pay your money and take your chances, but they were "refurbed" for a reason...they absolutely do not "replace the insides"...they would throw them away first! A refurbed router is essentially checked for proper firmware flash, tested briefly, prettied up, and put in a new box. No manufacturer actually repairs routers, there is no money in it. Sometimes you luck out and it was just a bad power brick, and often it was just user-error that was the problem...but otherwise refurb routers are in precisely the same condition as when they were returned.

Hmm.

Well have a look, read the reviews:

»www.amazon.com/NetGear-WNR3500L-···6DYQXVYN

They may be "ok", but they are not "good as new". Your router is the distribution point for all your on line data throughout your house, it usually is on 24/7/365...for that, I would want more than "ok".

Hmmm...

PS - Your conversation with Chris sounds good. The prices and set-up described is spot on, and he sounds knowledgeable. I have found that not all Comcast reps are equally aware of their own products and policies

Yeah well, and he even speaks english.