It appears he is suggesting OPEN ACCESS agreement whereas the customer is
allowed to choose which company they want to get their news, email, and
service from.
The CMTS belongs to whichever cable company installed it. If they are
utilizing Cisco GSRs and UBRs, they will most likely be using MPLS and VPN
to accomplish this. I would check to see what the downstream and upstream
are running. Big difference between QPSK, QAM 16 and QAM 64.
They will not be overbuilding the CMTS to accomplish this. The service
company brings in their connection to the HeadEnd (OC3, OC12 whatever). If
your company wants to overbuilding the CMTS you are talking about alot of
work and money. I do not know what cable company you are dealing with but I
doubt they would just give away channels as they lose revenue with TV when
doing so. You are taking a channel away both in the upstream and
downstream.
The billing will be the service provider's issues. The cable company will
charge for the bandwidth utilized. (depending upon the agreement).
As this is a shared network, I would check the numbers of homespassed per
node. This can range from 75 to 3000. Cablelabs recommends 500 homes passed
per node. I would also check the number of subscribers per Blade card on
the UBR. Cisco recommends not to exceed 1000 customers per blade.
The cablemodem receives the permission to come on line from a LDAP server
and usually uses a 10.X.X.X IP address and the customer will receive an IP
from the Whom The cable company or the service provider? This as well
needs to be reviewed.
I know that cable companies are striving to achieve QOS but right now it is
best effort. In your readings I would recommend Michael Adams book
OpenCable Architecture from CiscoPress. I would also look at the Service
Level Agreement with the cable company you are dealing with. It is amazing
what happens when they change the cable plant around and not tell you what
they are doing.
I hope this helps.
Curtis
----- Original Message -----
From: "Donald B Johnson jr"
To:
Sent: Wednesday, May 23, 2001 9:23 AM
Subject: Re: Cable Multiservice Operators [7:5246]
> Couple of questions;
> Do you want to run DOCSIS?
> What do you mean the cable infrastructure is Cisco? Aren't you going to
> provide your own gear. Then you can combine/split the signal at the
headend.
> What do you mean they are going to sell you a frequency range? You should
> have only one DOCSIS downstream QAM per physical plant, hence only one
> frequency is needed not a range. It should be a standard 6 MHz ntsc
channel.
> Start at 555 MHz and count 6 MHz either way and these are your center
> frequencies. EX 549, 555, 561, 567 etc... Or if you are not in North
America
> you probally run an 8 MHz carrier. Never worked with Euro-DOCSIS, but it
> aint much different. You will also need a frequency for the upstream
> somewhere between 5 and 42 MHz, look for something 30 MHz and above. This
> will give you the friendliest environment for running the wide-boy 3.2 Mhz
> in the upstream.
> DOCSIS is a shared medium, this PVC MPLS-VPN you are talking about are ATM
> technologies (I Think) you can't run them on a DOCSIS network, security is
> provided through BPI or BPI+. Physical seperation means a separate cable
> plant, a cable company is not going to overbuild on themself just to
provide
> DOCSIS which runs on one of many frequencies.
> Can't do guaranteed service or QOS until DOCSIS 1.1. I would check into
that
> first and make sure all your gear is 1.1 compliant or else no QOS or BPI+.
> If you want give me a call if I haven't answered your questions fully. We
> will be offering voice soon on our DOCSIS networks, also.
> Don
>
> ----- Original Message -----
> From: "Alec Smiths"
> To: "Donald B Johnson jr"
> Sent: Tuesday, May 22, 2001 11:34 PM
> Subject: Re: Cable Multiservice Operators [7:5246]
>
>
> > Hi Don,
> >
> > We have a CATV partner. We will begin to give cable
> > internet services very soon. I want to ask about
> > logical and physical seperation issues. My company
> > wants to rent a frequency range from CATV operator, so
> > we will be able to operate on that freq. range. We
> > want to control our own customers. We want to give
> > guaranteed bandwidth. We try to find a way that they
> > shouldn't sell the same frequency range lots of ISPs.
> > We don't care about the extra investments, we have
> > enough budget. Cable Internet infrastructure is
> > totally Cisco. I read a document from Cisco and it
> > says some tradeoffs about physical seperation. But
> > they do not say technically impossible, they just say
> > it's not recommended. I want to know what are the real
> > difficulties about physical seperation, instead of
> > having a PVC or MPLS VPN through CMTS network.
> > --- Donald B Johnson jr
> > wrote:
> > > Yeah what do you want to know. I work for an MSO
> > > running DOCSIS.
> > > Don
> > >
> > > ----- Original Message -----
> > > From: "Alec Smiths"
> > > To:
> > > Sent: Monday, May 21, 2001 7:01 AM
> > > Subject: Cable Multiservice Operators [7:5246]
> > >
> > >
> > > > Hi group,
> > > >
> > > > I need to speak with a networker who has cable
> > > > operator experience. My company (ISP) will become
> > > a
> > > > partner with a CATV operator and will begin to
> > > give
> > > > data services over CATV network. But I have some
> > > > questions to discuss with group members who are
> > > > experienced about this type of network. please
> > > reply
> > > > if you have something to say about Cable
> > > Multiservice
> > > > Operations.
> > > >
> > > > Cheers,
> > > >
> > > > Alec
> > > >
> > > > __________________________________________________
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> >
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