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Discussion in 'TiVo Series3 HDTV DVRs' started by kosherbacon, Sep 25, 2007.
Wow, you registered just to post that?
You'll forgive me, I hope, for not understanding the technical minutiae of the super-special Comcast Motorola "digital voice" modem. But I hope you'll also recognize that what I said is only "incorrect" inasmuch as I failed to understand that the VOIP side functions as another modem rather than as a VOIP router.
The point was that Comcast service is VOIP, and that, just like adding a Vonage router to your setup, changing to the "Triple Play" won't affect the cable cards.
Actually I registered because I just got my Tivo HD because I was sick of using the SA 8300 that I had, though I still have a few of them in the house. And I do forgive you, maybe I was a bit rough in my reply there, I apologize. I just dislike misinformation. Also probably it was because I was posting at work.
Anyway, I hate the motorola EMTA's for unrelated issues.
It actually serves basically the same purpose as the phone boxes verizon installs when they to their Fios service, since FTTP can't supply power like the old copper lines used to.
So if you can forgive me for being annoying in my first post that would be great
I was a little grouchy this morning, myself... I should never log in to TCF or AVS before I finish my coffee... sorry so snarky.
In either event, glad you registered for a better reason than to smack me down! Welcome to the community!
Just because it doesn't go over the internet doesnt mean it's not VOIP. Voice over IP works on closed wan systems all over the world. Many companies have switched their internal PBX systems to save costs and also connect their national or global company together with it.
Comcast's VOIP solution is hybrid. They separate a completely different frequency on their cable infrastructure for a separate and dedicated quasi/tuned IP stream for their digital voice telephone system. It's my understanding and my personal experience that phone usage is not impacted by any broadband usage in my home, nor in my neighborhood because of this...separate frequencies. It also never goes out to the internet, it hooks right into the standard telephone network at a variety of nodal points within it's national infrastructure....which is how they can offer free long distance...every call is almost essentially a locally switched call.
It's actually quite slick, and in some case superior to standard over the internet services like Packet8, Vonage, etc., because it does not have to share bandwidth with all the other standard traffic...so even the best QoS capabilities still have deal with percentage of available broadband pie.
That's an excellent description of how it works, the Voice data also has priority on the network as well, internet speeds/service will degrade before voice is impacted, it would take a severe network issue to actually impact voice quality. 99% of all the problems tend to be in the customers home, either inside wiring or between the drop and the house (the former being technically the customer's "problem" the latter comcasts) I had to run new lines in my house for my modem and my HD boxes because the old cable was just not up to par for the signal requirements.
I've had the CDV now since it became available in my area, which I believe has been 6-7 months now, and it has only actually gone out once, when the pittsburgh switch actually went down impacting the entire region, it was back up in a few hours that time.
Just nitpicking, but that's not entirely true.
Cox's original phone service was not IP-based, although in practice it's a distinction without a difference. I think other companies are in the same boat
Their current offering is IP based and uses DOCSIS just like the cable modems, and probably uses the same carrier. Whether you separate out the voice traffic onto a different frequency or prioritize the voice traffic doesn't make a difference in practice..the effect is the same.
My understanding is that they haven't replaced all the old equipment, so some customers are still on the TDM system.