Should we have a Docsis 3.0 capable modem?

Author	All Replies
m29a join:2012-06-10 Indiana, PA 1 edit	Should we have a Docsis 3.0 capable modem? In september we upgraded from Performance speed tier to Blast! and we still have the old modem which is the Arris TM502G. I have read threads on the forums that have said that if you are on the Blast tier or above, you should have a DOCSIS 3.0 capable modem. Well today we tried to call and the guy said we go to speedtest and test our connection. The problem is, since we upgraded from Performance to Blast the speed has been the same ever since. And also I would think we should have a Docsis 3.0 capable modem considering we are no longer on the Performance speed internet tier. I thought that maybe it's because we are still using the same modem ever since. Can anyone give some information on this?
	to forum · permalink · 2012-06-10 16:55:07 ·

KevTech Premium join:2002-08-22 Seattle, WA	If your speeds have not changed then maybe your modem is not receiving the correct config file.
	to forum · permalink · 2012-06-10 17:35:50 ·
m29a join:2012-06-10 Indiana, PA	I have contacted ComcastSteve to possibly help me. But I can't help but wonder what's going on and what I need to do when I read threads like this that fit my situation perfectly: »forums.comcast.com/t5/Connectivi···/1307983
	to forum · permalink · 2012-06-10 17:45:53 ·
PeteC2 Got Mouse? Premium,MVM join:2002-01-20 Bristol, CT kudos:6	As long as you are in a Docsis 3.0 area, then absolutely, they need to swap you a Docsis 3.0 modem. Now that you have contacted ComcastSteve he should get this straightened out. -- Deeds, not words
	to forum · permalink · 2012-06-10 17:48:31 ·
EG The wings of love Premium join:2006-11-18 Union, NJ kudos:9	reply to m29a Have you tried resetting the Arris using the recessed reset button on the rear. Depress and hold it in until you see the front panel indicator lights begin to cycle, then release it. Now give it the time that it needs to re-sync with the system. This may help to pull the new config file if it is already queued / present on the local system CMTS. FWIW, technically it is not absolutely necessary to have a D3 capable modem for the Blast speedtier, but they themselves do recommend it.
	to forum · permalink · 2012-06-10 17:50:46 ·
m29a join:2012-06-10 Indiana, PA	Well my speeds when I was on performance usually fluctuated around 20/2. Now 9 months into having Blast! with the TM502G, my speeds fluctuate between that number and sometimes goes up to above 25/3. I just power cycled the modem I believe and let it re-sync and I used the Shaper detection module and this is what I got: DiffProbe release. January 2012. Build 1008. Shaper Detection Module. Connected to server 64.9.225.179. Estimating capacity: Upstream: 1124 Kbps. Downstream: 33302 Kbps. The measurement will take upto 3.0 minutes. Please wait. Checking for traffic shapers: Upstream: No shaper detected. Median received rate: 1120 Kbps. Downstream: Measurement aborted due to high packet loss rate. I don't even know what config I'm getting because I've looked at the event log and I don't really see anything on it that includes a config. I just want to know if everything is where it should be, and if I should worry about still having a D2 modem.
	to forum · permalink · 2012-06-10 18:16:14 ·
EG The wings of love Premium join:2006-11-18 Union, NJ kudos:9	said by m29a: I just power cycled the modem I believe and let it re-sync Did you reset it with the button as instructed ?
	to forum · permalink · 2012-06-10 18:30:40 ·
m29a join:2012-06-10 Indiana, PA	Yes.
	to forum · permalink · 2012-06-10 18:31:09 ·
boyered join:2011-06-06	reply to m29a When I had gotten blast service (25/4) in November they had given me a D2 modem. Around February I packed up my modem, went to the local office, and ask for a D3 modem. I was told it wasn't required and wouldn't see any speed difference, they didn't want to do it. All I did is say that I wanted the D3 modem for channel bonding and a more stable connection, few minutes later I was out the door with a D3 modem. Make a trip down and ask. Take everything you would need to give back to them. EDIT: Getting the D3 modem did increase the speed I would get with powerboost. 30/5 with the D2 and 36/6 with D3.
	to forum · permalink · 2012-06-10 19:24:49 ·
SysOp join:2001-04-18 Douglasville, GA Reviews: ·voip.ms ·T-Mobile US 3 edits	Thank you for posting this. I had the same question and wanted to know the speedtest before and after done with a D2 vs D3 on the same computer, on the same node. The million dollar question is did it cut your latency in half? If not, your webpages load exactly the same. Large file transfers only get PowerBoost for the first 20mb? So a 20% faster PowerBoost? So you should buy the D3 if you plan to buy one. Simple as that. But if you already have a D2 and are not above Blast!, D3 seems unnecessary.
	to forum · permalink · 2012-06-10 20:32:01 ·
plencnerb Premium join:2000-09-25 Elgin, IL kudos:2	said by SysOp: But if you already have a D2 and are not above Blast!, D3 seems unnecessary. I do agree with your statement. However, do you need a D3 modem in order to properly get the config files for IPV6? While I don't need a D3 modem for my current speed package (Performance), I want to make sure that the modem I have won't have any issues with IPV6 when it is rolled out in my area. --Brian -- ============================ --Brian Plencner E-Mail: CoasterBrian72Cancer@gmail.com Note: Kill Cancer to Reply via e-mail
	to forum · permalink · 2012-06-10 20:51:06 ·
SysOp join:2001-04-18 Douglasville, GA	My Motorola SURFboard SB5101U DOCSIS 2.0 Cable Modem supports IPv6.
	to forum · permalink · 2012-06-10 20:58:31 ·
m29a join:2012-06-10 Indiana, PA 1 edit	reply to boyered said by boyered: Make a trip down and ask. Take everything you would need to give back to them. There isn't a service area near me though, that's the thing. I also can't buy a D3 modem (actually I did buy the SB6121 but I had to return it because I guess it won't work with comcast voice also because I have the comcast voice cord going into the modem and I guess modems with the voice port are rare). When I called today, the guy said that most of the time a new modem swap is not necessary and I ended up ending the call after trying to explain to him that Comcast recommends a D3 modem and I have this old D2 modem from when I was on Performance. I found this on the status page from my modem: RF Parameters Downstream Freq/Power: 603.000 MHz -4 dBmV Signal to Noise Ratio: 36 dB Modulation: QAM256 Upstream Freq/Power: 23.750 MHz 45 dBmV Channel Type: DOCSIS 1.x (TDMA) Symbol Rate: 2560 kSym/sec Modulation: QAM16 This is the event log: Date Time Event ID Event Level Description *** 20000200 3 No Ranging Response received - T3 time-out * 20000300 3 Ranging Request Retries exhausted * 20000200 3 No Ranging Response received - T3 time-out * 20000300 3 Ranging Request Retries exhausted * 20000200 3 No Ranging Response received - T3 time-out * 20000300 3 Ranging Request Retries exhausted * 18000200 3 UCD invalid or channel unusable * 20000200 3 No Ranging Response received - T3 time-out * 20000300 3 Ranging Request Retries exhausted * 20000200 3 No Ranging Response received - T3 time-out * 20000300 3 Ranging Request Retries exhausted * 20000200 3 No Ranging Response received - T3 time-out * 17000400 3 SYNC Timing Synchronization failure - Failed to receive MAC SYNC frame within time-out period * 17000100 3 SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing * 17000400 3 SYNC Timing Synchronization failure - Failed to receive MAC SYNC frame within time-out period * 17000100 3 SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing * 17000400 3 SYNC Timing Synchronization failure - Failed to receive MAC SYNC frame within time-out period * 17000100 3 SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing * 17000400 3 SYNC Timing Synchronization failure - Failed to receive MAC SYNC frame within time-out period *** 20000200 3 No Ranging Response received - T3 time-out
	to forum · permalink · 2012-06-10 22:10:52 ·
Mike Wolf join:2009-05-24 Beachwood, NJ kudos:3 Reviews: ·Comcast	reply to plencnerb You need a D3 modem to recieve an IPv6 address from what it has been said, though there may be a few D2 modems that might support IPv6. Here is the list of approved modems that Comcast says supports IPv6 »mydeviceinfo.comcast.net/?s=i&so···1&sc=626 Keep in mind that this list is constantly growing as Comcast Labs tests devices.
	to forum · permalink · 2012-06-10 22:22:48 ·
plencnerb Premium join:2000-09-25 Elgin, IL kudos:2	That is what I figured. Now, we all know that June 6th was the big day for IPv6...keep that in mind, as I explain things... Back on May 18 of this year, I went into my local Comcast office and added Comcast Digital Voice to my service (I had an AT&T POTS Line, and ported the number over). In doing this, the local office told me that I would need a "new" modem. At the time, I had a Scientific Atlanta By Cisco, model # DPC2100R2. So, the local office gives me the "new" modem. I take it home, swap it out with my old one, and get everything up and running. Phone does not work yet, as it takes about 3 business days to port the number over. But, that's not a big deal, and when the switch took place, I had no issues getting everything running. The new modem I got is a Thomson Internet Voice Modem, Model # DHG536. I don't know if mine is NCS or IMS, from the list you linked to. However, this is a D2 modem, and the list currently shows that it does not support IPv6. So, my question then becomes this...obviously on May 18th, Comcast was less then a month (19 days to be exact) away from turning on IPv6. Why would they swap my old modem out for one that apparently does not support IPv6? I know I needed a different modem then the one I had, as that did not support Comcast Digital Voice. But, I would have thought they would have given me a modem that supported both Digital Voice, and IPv6. Should I go back in there and ask for another modem? If so, which one should I try to get? The local office is not far from me (less then 1 mile), so its not that big of a deal to go over there. --Brian -- ============================ --Brian Plencner E-Mail: CoasterBrian72Cancer@gmail.com Note: Kill Cancer to Reply via e-mail
	to forum · permalink · 2012-06-10 23:30:34 ·
m29a join:2012-06-10 Indiana, PA	Okay I just got off chatting with Comcast support and I am going to be going to a service center and attempt swapping my modem for a Docsis 3.0 modem. I will post how speeds change (hopefully) and I hope I'll have the correct config when I setup my new modem.
	to forum · permalink · 2012-06-10 23:57:19 ·
Mike Wolf join:2009-05-24 Beachwood, NJ kudos:3 Reviews: ·Comcast	reply to plencnerb said by plencnerb: Should I go back in there and ask for another modem? If so, which one should I try to get? The local office is not far from me (less then 1 mile), so its not that big of a deal to go over there. To be completely honest I would purchase my own D3 modem because renting a separate D3 modem plus a voice modem tends to add up. I know that in some areas serviced by Comcast you can purchase your own voice modem from BestBuy but I don't know where those would be and if you are in such an area and if those that are sold support D3 as well. I've read from others on the forum that they have both a D3 modem that they own on their account as well as renting a voice modem from Comcast. Maybe that is an option to consider? said by plencnerb: So, my question then becomes this...obviously on May 18th, Comcast was less then a month (19 days to be exact) away from turning on IPv6. Why would they swap my old modem out for one that apparently does not support IPv6? I know I needed a different modem then the one I had, as that did not support Comcast Digital Voice. But, I would have thought they would have given me a modem that supported both Digital Voice, and IPv6. Ok, to answer this part. Comcast payment offices, technical support on both the phone and online chat, installers, and technicians literally have no idea what the engineers are doing two days in advance. The left hand (the part that deals with the public) and the right hand (the part that actually makes the decisions and make things happen) never talk to each other. This issue has been experienced many times when trying to find out the cause of service interruptions, system upgrades, channels being added or removed, when Docsis 3.0 service will be brought into an area, speed increases, dealing with the emergency alert system upgrades, what set top boxes and modems are available for rent in any given area. In my experience at least, the payment offices have no publicly listed incoming phone number either so you have to call the 800 number which doesn't get you far when trying to find out specific information. Some say exact dates and timeframes are not given to the public in case something comes up that causes delaying of a scheduled rollout, such as the IPv6 debacle with the Netgear modems in California.
	to forum · permalink · 2012-06-11 00:13:23 ·
plencnerb Premium join:2000-09-25 Elgin, IL kudos:2	said by Mike Wolf: To be completely honest I would purchase my own D3 modem because renting a separate D3 modem plus a voice modem tends to add up. So, if I understand you correctly, Comcast does not offer a D3 Voice Modem to rent at all? If I were to rent totally from them, I would have to rent a D3 modem (so I could get faster speeds, improved performance, and IPv6 support) as well as my current D2 Voice modem? In that case, would I then have to split the Coax coming into the house on the data line? Right now, on the back of the house, my line is split outside..one line goes to my room where the Voice Modem is, and the 2nd line goes to feed the 2 TV's in the house (which, does have a 2nd split, but its downstream from the 1st). If I were to have 2 actual modems, would I have to split the data line myself? Seems kind of a pain to me, not to mention I would have 2 physical cable modems. It just does not seem right to me..I would think that someone would make a D3 Voice modem, that I can either purchase outright(and be supported by Comcast), or rent directly from Comcast. said by Mike Wolf: Comcast payment offices, technical support on both the phone and online chat, installers, and technicians literally have no idea what the engineers are doing two days in advance. The left hand (the part that deals with the public) and the right hand (the part that actually makes the decisions and make things happen) never talk to each other. I do totally agree with you on this point. It's sad really when you think about it. In a perfect world, both of these groups would know what the other is doing, and all kinds of issues and problems could be eliminated. --Brian -- ============================ --Brian Plencner E-Mail: CoasterBrian72Cancer@gmail.com Note: Kill Cancer to Reply via e-mail
	to forum · permalink · 2012-06-11 07:46:59 ·
Markart join:2012-05-24	reply to m29a You must have a Docsis 3.0 cable modem if you want to access at Docsis 3.0 speeds and Blast speedtier is based on Docsis 3.0. For example, if one has a cable modem that only supports DOCSIS 2.0, and the system is running 3.0, the connection will be established at DOCSIS 2.0 speeds. And DOCSIS 2.0 modems do not support IPv6 only DOCSIS 3.0 supports IPv6. Arris TM502G only supports DOCSIS 2.0. So there is no use in resetting or troubleshooting your modem.
	to forum · permalink · 2012-06-11 08:54:29 ·
nate1234 join:2008-08-21	There are actually some DOCSIS 2.0 devices that support IPv6. "The 'DOCSIS 2.0 + IPv6' specification also allows support for IPv6 on DOCSIS 2.0 cable modems (via a firmware upgrade)"
	to forum · permalink · 2012-06-11 08:59:12 ·

US Cable Support > Comcast HSI > Should we have a Docsis 3.0 capable modem?