ftth_freak
join:2005-06-17
Ballwin, MO
| reply to lengyelc
Re: YOUR WRONG
Obviously you are technically lacking in VoIP knowledge. Cable Co's like Comcast, Time Warner, Charter, Cox and others use an entirely separate CMTS and separate return and forward signal than their cable modem system. This insures the QoS for the cable co's VoIP/phone service. For all of you P2P defenders, this mean when you are sucking up all of the upload and downoad capacity in your neighborhood with your cable modem, the VoIP/phone CMTS will not be affected. When using a third party VoIP like Vonage, Vonage piggy backs off of the same bandwidth as your cable modem and thus will be affected by the users bandwidth habits.
For instance, a user who pays for the lowest level of modem speed and uses Vonage will hear a degraded quality of voice and could also experiance dropped call if the down/up load a large file at the same time.
FYI...all things are not created equal in reality...only in your mind. |
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fatmanskinny
Premium
join:2004-01-04
Wandering | That was a great post. Thanks for educating me. I sure as hell didn't know that!
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The only place where Success comes before Work is in the dictionary. |
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MacLeech
The one and only
Premium
join:2001-07-14
SoCal
2 edits | reply to ftth_freak
said by ftth_freak  : Cable Co's like Comcast, Time Warner, Charter, Cox and others use an entirely separate CMTS and separate return and forward signal than their cable modem system. Cable co's COULD do that, but the most don't.
Most setup separate service flows over the same upstream/downstream channels the cable modems use. Phone services are given higher priority and guaranteed bandwidth so general internet use doesn't impact phone service.
If the cable companies were using separate CMTSs or even just separate upstream/downstream channels they couldn't provision eMTAs to allow for both internet access and phone service from the same unit as current DOCSIS 1 and 2 modems can't tune to more than 1 upstream and 1 downstream channel at a time.
Companies that REQUIRE seperate phone and internet modems may be using separate channels or CMTSs but that's pretty rare.
The nice thing about cable co's VOIP implementations is that they DON'T route voice traffic over the internet like 3rd party VOIP providers HAVE to. Cable can keep the traffic on their own private network (on it's own VLAN) until they hand it off to PSTN providers if needed for an off-net call. Some cable providers also have agreements and links with others so they can directly hand off traffic to each other without 3rd party network involvement. If both ends of the call are on cable VOIP, the call traffic may not even leave the cable providers' networks.
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funchords
Hello
Premium,MVM
join:2001-03-11
Washington, DC
 ·Verizon Online DSL
 ·Skype
| reply to ftth_freak
Re: YOUR WRONG ... and so are you ... and who cares?
said by ftth_freak :Obviously you are technically lacking in VoIP knowledge. I think the above sentence ought to be banned from DSLReports. We're all here to learn. Otherwise we're just showing off.
said by ftth_freak :Cable Co's like Comcast, Time Warner, Charter, Cox and others use an entirely separate CMTS and separate return and forward signal than their cable modem system. Comcast has elected to use the same return as their High-Speed Internet. But then they use DOCSIS service flows to carve out space (in the already crowded upstream) for it.
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Robb Topolski -= funchords.com =- Hillsboro, Oregon
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Anonymous
Premium
join:2004-06-01
IA | reply to ftth_freak
Re: YOUR WRONG
Not only it has dedicated bandwidth it's also a lot more secure.
Cable co in my area charges $29.99/mo if you bundle all three services so it's worth $5 extra just to have these benefits. |
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Matt
Gone playing Dragon Age Origins
Premium
join:2003-07-20
Jamestown, NC
·North State Commun..
| reply to ftth_freak
Additionally, the MSOs VoIP product never touches the internet. It flows over their own network to the facility where they have their PSTN connectivity. They can control the quality end-to-end, whereas an Indie VoIP provider is subject to the delays of the internet.
FYI, I have an Indie VoIP phone. (Nuvio nPBX w/ a Polycom 501) |
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funchords
Hello
Premium,MVM
join:2001-03-11
Washington, DC
·Verizon Online DSL
·Skype
| said by Matt :Additionally, the MSOs VoIP product never touches the internet. Except on Comcast, where it does -- albeit it never leaves Comcast's network but where it does ride on Comcast's network, that network is part of the Internet.
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Robb Topolski -= funchords.com =- Hillsboro, Oregon
More fun, more features, Join BroadbandReports.com, it's free...
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Matt
Gone playing Dragon Age Origins
Premium
join:2003-07-20
Jamestown, NC
·North State Commun..
| said by funchords :said by Matt :Additionally, the MSOs VoIP product never touches the internet. Except on Comcast, where it does -- albeit it never leaves Comcast's network but where it does ride on Comcast's network, that network is part of the Internet. Comcast controls the QoS on "their" network. Who cares if their network is attached to the internet or not, it never leaves their backbone so no, it never traverses the internet. |
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jester121
join:2003-08-09
Lake Zurich, IL | reply to funchords
:boggle: |
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funchords
Hello
Premium,MVM
join:2001-03-11
Washington, DC
·Verizon Online DSL
·Skype
| reply to Matt
said by Matt :Comcast controls the QoS on "their" network. Who cares if their network is attached to the internet or not, it never leaves their backbone so no, it never traverses the internet. I didn't mince the words in that way, I said that the VOIP upstream of Comcast Digital Voice does ride on the Internet. It's not like Time Warner, which uses a dedicated chanell, Comcast uses the same uplink as HSI.
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Robb Topolski -= funchords.com =- Hillsboro, Oregon
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bsr64000
@rcn.com
| reply to ftth_freak
no youre wrong!
cable co's use the SAME frequency and cmts as cable modem. but the voice packets are prioritized over data packets.
said by ftth_freak :Obviously you are technically lacking in VoIP knowledge. Cable Co's like Comcast, Time Warner, Charter, Cox and others use an entirely separate CMTS and separate return and forward signal than their cable modem system. This insures the QoS for the cable co's VoIP/phone service. For all of you P2P defenders, this mean when you are sucking up all of the upload and downoad capacity in your neighborhood with your cable modem, the VoIP/phone CMTS will not be affected. When using a third party VoIP like Vonage, Vonage piggy backs off of the same bandwidth as your cable modem and thus will be affected by the users bandwidth habits. For instance, a user who pays for the lowest level of modem speed and uses Vonage will hear a degraded quality of voice and could also experiance dropped call if the down/up load a large file at the same time. FYI...all things are not created equal in reality...only in your mind. |
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Network Guy
join:2000-08-25
New York
·PHONE POWER
·Broadvox Direct
·Verizon Online DSL
| reply to ftth_freak
said by ftth_freak : Cable Co's like Comcast, Time Warner, Charter, Cox and others use an entirely separate CMTS and separate return and forward signal than their cable modem system. This insures the QoS for the cable co's VoIP/phone service. For all of you P2P defenders, this mean when you are sucking up all of the upload and downoad capacity in your neighborhood with your cable modem, the VoIP/phone CMTS will not be affected. MSOs do not signal the VoIP traffic separately. They use the same QAM modulation, merely different channel. That means when the local node becomes saturated with more voice traffic than allocated on that fiber strand, you will get similar conditions to routing VoIP over public Internet.
Also, MSOs don't always necessarily hand off directly to PSTN. They may use someone like Level3 who then turns around and hands it off.
This has always been the major difference between cable VoIP and third-party carrier VoIP. Personally, choppy calls via CLEC VoIP are often rare and far between that it hardly matters and justifies the $15 price mark-up. |
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DonLibes
Premium,ExMod 2001
join:2003-01-19
| reply to Anonymous
said by Anonymous :Cable co in my area charges $29.99/mo if you bundle all three services so it's worth $5 extra just to have these benefits. But what about next year when the promotion ends and they jack up the rates? |
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baj475
join:2004-11-02
Chico, CA
·Future Nine Corpor..
| reply to Network Guy
Network Guy,
Are you saying that a $15 price mark-up is justified because choppy calls via CLEC VoIP are rare and far between? If so, I guess that depends how choppy the alternatives are. The difference in voice quality between my previous ILEC landlines and my Magicjack and Future Nine VOIP lines is almost nil. Clearly not worth spending $15 more for a slight possible improvement. |
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Network Guy
join:2000-08-25
New York | You read that wrong.
I prefer the cheaper CLEC alternative both because in my experience the difference is negligible and because of price.
And I just personally prefer not to give the evil local MSO one more penny for anything. |
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baj475
join:2004-11-02
Chico, CA | Network Guy,
I wondered if I was reading it wrong.  |
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Network Guy
join:2000-08-25
New York |  |
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Anonymous
Premium
join:2004-06-01
IA | reply to DonLibes
I've had it for almost 3 years now. Also this is regular pricing. |
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DonLibes
Premium,ExMod 2001
join:2003-01-19
| said by Anonymous :I've had it for almost 3 years now. Also this is regular pricing. Please identify the cable company to which you are referring, preferably with a website that posts the rates so we can all see them. |
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MacLeech
The one and only
Premium
join:2001-07-14
SoCal
1 edit | said by DonLibes :said by Anonymous :I've had it for almost 3 years now. Also this is regular pricing. Please identify the cable company to which you are referring, preferably with a website that posts the rates so we can all see them. Try here:
»www.mediacomcable.com/phone.html |
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