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JediCheese

join:2006-07-26
Phoenix, AZ

[AZ] Modem Choice

With the speed upgrade that Cox recently gave us in the AZ market, I've been bumped up to 25 mbps. They recommended moving up to a Docsis 3.0 modem. Right now, I have a SB5101n.

I already have a router, so there isn't any need for me to get a higher end modem.

I'm wondering if it's worth purchasing a SB6121 or DPC3010. Both are basic Docsis 3.0 modems. Unfortunately, I have no found any reviews that compare the two. Does anyone have any suggestions on which would be the best to purchase?


Anonguy

@cox.net
said by JediCheese:

With the speed upgrade that Cox recently gave us in the AZ market, I've been bumped up to 25 mbps. They recommended moving up to a Docsis 3.0 modem. Right now, I have a SB5101n.

I already have a router, so there isn't any need for me to get a higher end modem.

I'm wondering if it's worth purchasing a SB6121 or DPC3010. Both are basic Docsis 3.0 modems. Unfortunately, I have no found any reviews that compare the two. Does anyone have any suggestions on which would be the best to purchase?

get a Moto 6180, 6141 or the Cisco 3010.

The 6121 is already obsolete with only being able to bond 4 down streams.

Of the 3 i suggest I would give a slight edge to the Cisco. But you can;t go wrong with any of them

brad152

join:2006-07-27
Phoenix, AZ
Reviews:
·CenturyLink
reply to JediCheese
I have the 6580, and been using it for a year or so with no issues seeing 60+Mbps even over WiFi.

The only reason i'd say go with that is if your router is a little older you're going to have issues doing anything over 15Mbps or so if it's a Wireless G box.


Optimus2357
Premium
join:2010-11-21
West Warwick, RI
kudos:3

1 recommendation

I, and most power users, don't recommend modem/router combo's. The RAM and Flash is shared between the two units, harder to isolate network issues, and since when does Mototola make good AP's? Not to mention it keeps you from having personal control over the firmware. I wouldn't be caught dead with one. JMHO


Anonguy

@cox.net
said by Optimus2357:

I, and most power users, don't recommend modem/router combo's. The RAM and Flash is shared between the two units, harder to isolate network issues, and since when does Mototola make good AP's? Not to mention it keeps you from having personal control over the firmware. I wouldn't be caught dead with one. JMHO

+1

PinkyThePig
Premium
join:2011-05-02
Tempe, AZ
Reviews:
·Cox HSI
reply to JediCheese
»www.amazon.com/Zoom-DOCSIS-Cable···063K4NN6

I've been using this one and have loved it so far. The best first-world-problem-fixer about the whole thing is that it has a power button so power cycling is just that much easier


ikyuaoki

join:2011-04-12
Wichita, KS
Reviews:
·Cox HSI
reply to Anonguy
said by Anonguy :

The 6121 is already obsolete

that is not true. it is not obsolete. the SB6120 or SB6121 provides powerhorse performance that works very well. I am still have the two SB6120 modems so I've got bonded 4x4 enabled online.

your saying is so ridiculous.


Anonguy

@cox.net
said by ikyuaoki:

said by Anonguy :

The 6121 is already obsolete

that is not true. it is not obsolete. the SB6120 or SB6121 provides powerhorse performance that works very well. I am still have the two SB6120 modems so I've got bonded 4x4 enabled online.

your saying is so ridiculous.

Obsolete it is when you compare it to the other available modems.

I didn't say it wouldn't work.


ikyuaoki

join:2011-04-12
Wichita, KS
Reviews:
·Cox HSI

1 edit
If i would like to buy a newer 8x4 cable modem but... there's missing: where's the eight bonded channels upsteam available as the 8x downsteam?

I decided to skipped the 8x4 off and move forward to the newer modern DOCSIS 3.1 cable modem that provides much more efficient spectrum channels than previous 4x4 and 8x4 cable modems. that's what i am aim for at is more efficient spectrum per channels that which can provides up to 10Gbits/1Gbits available at higher efficient yield available.

i will be buying the two DOCSIS 3.1 modems afterward that.

i am glad i did not wasted on the another one 8x4 set.

-----------------------------------------------------------

EDIT:

Why? my standard is much higher and I put a copies of network components into the RAM drive and it is linked via the variable sets for cleaner fuel and make my computer pretty much less lag.

brad152

join:2006-07-27
Phoenix, AZ
Reviews:
·CenturyLink
reply to Optimus2357
Motorola AP's are the only ones that never gave out when i did tech support for apple, their VPN seems to always kill a WiFi router prematurely.

My 6580 has been rock solid, never looses connection, and WiFi file transfers seem to be ~30MBps. The only time it had an issue was when a cox tech support agent pushed the wrong firmware to it and luckily someone here on the form was able to fix that for me.

This is over WiFI from the 6580 through three brick walls..


JediCheese

join:2006-07-26
Phoenix, AZ

2 edits
reply to JediCheese
Thanks all!

I did mean the Motorola SB6141 but accidentally typed SB6121. Just searching through the boards here, the Cisco DPC 3010 is more popular and comes highly recommended.

I assume that a new Cisco DPC 3010 through amazon should work on the Cox network. From what I've read on the Cox website, they don't sell this model but it's approved for use. Thus a brand new modem should work out of the box (after activation)?

I don't have any need for the router function. I run a Cisco 2691 as my primary router (with an Asus EAN66 for wireless). I love being able to pull true SNMP data from the router. Makes viewing network stats and status very easy and quick,


Anonguy

@cox.net
reply to ikyuaoki
said by ikyuaoki:

If i would like to buy a newer 8x4 cable modem but... there's missing: where's the eight bonded channels upsteam available as the 8x downsteam?

I decided to skipped the 8x4 off and move forward to the newer modern DOCSIS 3.1 cable modem that provides much more efficient spectrum channels than previous 4x4 and 8x4 cable modems. that's what i am aim for at is more efficient spectrum per channels that which can provides up to 10Gbits/1Gbits available at higher efficient yield available.

i will be buying the two DOCSIS 3.1 modems afterward that.

i am glad i did not wasted on the another one 8x4 set.

-----------------------------------------------------------

EDIT:

Why? my standard is much higher and I put a copies of network components into the RAM drive and it is linked via the variable sets for cleaner fuel and make my computer pretty much less lag.

But we aren't talking about you.

We are talking about someone that is going to buy a modem soon. Not when the 3.1 modems are out.

Considering only what is avalable today the 612x is obsolete.

mattybaby

join:2003-05-14
Phoenix, AZ

1 recommendation

reply to JediCheese
I was in the same boat as you JediCheese. Same plan, DOCSIS 2.0 modem.

I picked up a used Cisco DPC3010 8x4 on ebay for $34 and then sold my sb5101u for $21. After fees, it was $17 to upgrade to DOCSIS 3.0

The only benefit I have seen with the DPC3010 is being about to sustains the high speeds (max 34Mbits down) during prime time hours. I get 6 channels down and 3 up. My guess is the other channels are used for the DOCSIS 2.0 modems.

I can not speak for the other DOCSIS 3.0 modems. The $34 used DPC3010 has been flawless in the past few months.


odog
Cable Centric Vendor Biased
Premium,VIP
join:2001-08-05
Atlanta, GA
kudos:14
Reviews:
·Comcast
reply to ikyuaoki
said by ikyuaoki:

said by Anonguy :

The 6121 is already obsolete

that is not true. it is not obsolete. the SB6120 or SB6121 provides powerhorse performance that works very well. I am still have the two SB6120 modems so I've got bonded 4x4 enabled online.

your saying is so ridiculous.

Not ridiculous, actually rather sound logic.

The 4x4 DOCSIS3.0 modems are going to be the "D1.0" modems of the current generation of hardware. We have 16x4, and 24x8 modems on the way 4x4 is the bare minimum. The price delta between the SB6121(4x4 single tuner), and SB6141(8x4, dual 96MHz tuners) is $10 and buys you a much better modem.

lilstone87

join:2009-04-09
Portsmouth, VA
kudos:3
Reviews:
·Cox HSI
said by odog:

said by ikyuaoki:

said by Anonguy :

The 6121 is already obsolete

that is not true. it is not obsolete. the SB6120 or SB6121 provides powerhorse performance that works very well. I am still have the two SB6120 modems so I've got bonded 4x4 enabled online.

your saying is so ridiculous.

Not ridiculous, actually rather sound logic.

The 4x4 DOCSIS3.0 modems are going to be the "D1.0" modems of the current generation of hardware. We have 16x4, and 24x8 modems on the way 4x4 is the bare minimum. The price delta between the SB6121(4x4 single tuner), and SB6141(8x4, dual 96MHz tuners) is $10 and buys you a much better modem.

I will upgrade from my 8x4, when cox starts supporting 24x8 modem's. Still when will cox be upgrading it's network more? As we all know the 1ghz plant, is one of the main limiting factors for more channel's. Also imo the 16x4 modem's will be rather a waste at this point, no thanks on a 4 to 1 ratio between downstream, and upstream channel's on a modem.

JediCheese

join:2006-07-26
Phoenix, AZ
reply to mattybaby
Thanks for your experience.

I've ordered a Cisco DPC3010 from Amazon. Yes, it's more than what I could find on ebay but I *hopefully* won't have to worry about a counterfeit or one that isn't able to be activated on the network. An extra $50 isn't too high of a price for a new piece of equipment that shouldn't give me any headaches vs something that is an unknown.


Optimus2357
Premium
join:2010-11-21
West Warwick, RI
kudos:3
reply to odog
I would like to state my opinion that there is more to quality and performance of a DOCSIS connection then max channels bonded. Kind of how a routers max wireless connection rate does not determine a routers worth. Also, the SB6120 had superior case design which I think gave it better thermal dynamics. I think that lead to it having a more stable connection overall. And I would bet, and though I don't have any hard data, that the quality of parts decreased as Motorola had to complete with the many other manufactures that started making D3 modems. My point being I think that all things considered equal, with a service level under 50Mbps, the SB6120 would demolish the SB6141 in latency and stability of transfer rate.


odog
Cable Centric Vendor Biased
Premium,VIP
join:2001-08-05
Atlanta, GA
kudos:14
Reviews:
·Comcast
said by Optimus2357:

My point being I think that all things considered equal, with a service level under 50Mbps, the SB6120 would demolish the SB6141 in latency and stability of transfer rate.

They are effectively the same chipset, TI PUMA5. The SB6141 is just a newer, more advanced version of it. They are so similar, they even use the same firmware.

m8trix

join:2003-12-24
Phoenix, AZ
kudos:4
Reviews:
·Cox HSI
reply to Optimus2357
as some one who upgrade from a 6120 to a 6141 i can say the 6141 is better in my experience and runs much cooler. my 6120 never gave me and issue but the latency is a little bit less on the 6141 and again is much cooler to the touch.

the other nice bonus is if you get cox whole home dvr the 6141 has a built in moca filter for added protection

phxuser

join:2010-03-16
Scottsdale, AZ
I also upgraded from a SB6120 to a SB6141 three months ago. There was a good market for used SB6120's so the upgrade price was very reasonable.

I might mention that the downstream signal levels on the SB6141 are 1-2 db lower than the SB6120. The Moca filter on the 6141 may be the reason.


ikyuaoki

join:2011-04-12
Wichita, KS
Reviews:
·Cox HSI
reply to odog
Well, i am planning go forward to DOCSIS 3.1 what it will buy me a better ones that is more efficient spectrum of bandwidth at while reducing the 1Ghz bandwidth range, not increasing above beyond the 1Ghz bandwidth range spectrum that's goes buy me into DOCSIS 3.1 where i am looking forward.

In other words, that DOCSIS 3.1 can provides up to 10Gbits/1Gbits that is better width band.


bbeesley
VIP
join:2003-08-07
Richardson, TX
kudos:5
said by ikyuaoki:

Well, i am planning go forward to DOCSIS 3.1

unless you are building your own cable network you will be wasting your time

3.1 is not yet a standard and if and when it does become one, it will introduce new mechanisms for increasing bandwidth such as mid-splits to add upstream carriers above 85Mhz as well as OFDM signalling that will increase downstream capacity

but until then standard is ratified, and vendors go through certification and your service provider deploys new CMTS equipment and makes the necessary upgrades to the RF infrastructure, a 3.1 modem will gain nothing over your current 3.0 modem


ikyuaoki

join:2011-04-12
Wichita, KS
Reviews:
·Cox HSI
That OFDM signals are more efficient spectrum channels over the old QAM channels. unlikely the QAM, the OFDM does not use the big 6Mhz channel or 8Mhz channel in europe of an width band per channel.

that's what i am looking forward to the DOCSIS 3.1 specification.


Optimus2357
Premium
join:2010-11-21
West Warwick, RI
kudos:3
reply to m8trix
Perhaps "demolish" was too strong a word. I have just found newer is not always better. Without going into too much detail, I believe the build quality of a 6120 is better then the SB6121, the main difference being the case for better brand clarity (SB901 looking like the SB6120). Consider that along with the fact that some manufactures find ways to reduce cost while still keeping the same product specs to increase profit margin as the product line matures, I believe the SB6120 is superior in any market that does not have more then 4 channels downstream available yet. I know there are many other variables too, my point was just don't count the ol' boy out quite yet.