Cable InternetPosted by ERMURAT 2015-04-13 22:32:31Cable Internet Services via DOCSIS SYSTEMS :TOWN, CAMPING, HOTELS, CAMPUS
What are the main advantages of using docsis cable modem service?
First and foremost, the main advantage is the speed. With bi-directional access (two ways) the customer is receiving speeds up to 25 Mbps and transmitting (sending) at speeds up to 20 Mbps. Also, a bi-directional cable modem has a constant connection to the Internet.What's required for Internet cable on the provider side?
At the “Head End” you will need, a broadband Internet connection, such as DSL or cable, T1 or wireless. In most cases you will need an "always on" type of connection with a bandwidth of at least 50 Mbps on both upload and download you will need an Ethernet router connected to, the broadband connection. LAN side of the router you need to connect a CMTS and a provisioning server. You will connect your CMTS to your cable network.
The Network need to use two ways amplifiers and will be ended by the distribution taps at the end of the network. The subscriber access point will be connected to one output of the nearest TAP.
At the user side juste a cable modem is needed to access internet services and an EMTA if in addition VOIP services are needed.What Damery offers you for Internet cable systems?
DAMERY SA is able to offer the globale solution for Cable Internet including, CMTS, Cable modems, Provisioning & Monitoring software and support services to install, make work and maintain the system. Damery offer is focused on the small and middle sized networks and compliant with the latest Docsis specifications.
DOCSISPosted by ERMURAT 2015-04-13 21:36:27
How DOCSIS systems work?
The term DOCSIS,
itself an acronym for Data Over Cable Service Interface Since its initial
release in 1997, DOCSIS has been better known as the technology behind cable
broadband services offering transparent IP traffic between the Ethernet
interface and user interface.
Different variants of the DOCSIS standard are
used by different broadband providers, which may confuse some consumers and put
some on quest to understand their broadband options better.
There are three
different levels of DOCSIS specifications, 1.x, 2.x, and 3.x, each one tends to
improve performance and/or offer additional features over the last. This means that 3.x tends to be a better
standard than 2.x, which in turn is generally better than 1.x.
There are a few
exceptions to this, and of course a working definition of ‘better’ would
probably be helpful. Some areas serviced
by second-tier cable companies still use older DOCSIS 1.x systems, but most
top-tier providers using 3.x, but tend to charge more money for greater
For the purposes of
fostering a productive discussion on the subject, greater features and
performance will generally be considered ‘better’ than great value. After all, prices for the same level of
service tend to fall over time and thus value is relative and highly dependent
specification can be broken down into at least two layers, the physical layer
(PHY) and the media access control (MAC) layer
DOCSIS Physical Layer
The physical layer
is the easiest to understand as it refers to things that people can see and
touch, in this case wiring and routing equipment. The physical layer also specifies of the
frequency at which data is transmitted over the wires of a cable modem system
and DOCSIS-compliant network. The faster
the transmission speeds, the greater the performance tends to be, but there are
limitations on distance. Limitations on
distance restrict the areas in which DOCSIS-based cable modem services can be deployed
their speed, and their pricing.
DOCSIS MAC Layer
The MAC layer is
used to handle the massive packet switching requirements of a cable network and
ensure that there are fewer traffic jams caused by signals collision.
In effect, the MAC
layer is something of a traffic-cop that helps maximize the performance of a
network. Not all MAC layers are created
equal, however, and understanding how MAC affects a major network is
There are dozens,
perhaps hundreds of homes within a housing sub-division that are serviced by
dedicated DOCSIS networking hardware provided by the broadband service provider
Think of the
problem faced by network architects this way: imagine data on a DOCSIS network transmitted
by each user at the same time on the same frequency channel.
Nobody can receive
the data correctly as there is a mix up of the signals. The only way to avoid
this chaos is the transmitter of the modems to obey to certain rules to
transmit, and they do not always work 100% of the time.
There is no
guarantee that only a single sub-division is serviced by one terminal, but for
the purposes of simplification, the example should suffice. Each device has its own specific address and
name, referred to as an IP address and MAC address respectively.
The MAC address is
used for intra-network signal timing rather than actual data transmission and
reception. The central DOCSIS manager
called CMTS will make rules in order to allow the transmission from one user at
a time using the MAC address and a centralized timing system.
CMTS is the hard and brain of the DOCSIS
Understanding the Different
The original DOCSIS
1.0 standard offered support for a single channel, a trend that continued up
until the introduction of the most recent DOCSIS standard, DOCSIS 3.0. The differences between DOCSIS 1.0 and 1.1
are mostly academic, and relate to the number of consumers that can be serviced
and their range from hardware operated by a cable provider. The official throughput for DOCSIS 1.x
systems was limited to a usable 38 Mbps downstream and approximately 9 Mbps of
upstream. These rates are shared amongst
multiple consumers in most cases, and are practical. Some hosts provide higher specs, specifically
42.88 Mbps downstream and 10.24 Mbps upstream, but these fail to calculate
network overhead and are not necessarily honest figures.
As competition with
DSL and other forms of broadband services, a new standard was needed to deliver
greater speeds to a greater number of consumers who were believed to be using
upstream and/or downstream numbers as a guide to making purchasing decisions.
A standard that
offered substantially higher bandwidth and that standard became known as DOCSIS
2.0 and eventually DOCSIS 2.0 + IPv6.
DOCSIS 2.0 actually kept the already impressive downstream speeds, but
tripled the upstream performance to 27 Mbps.
The logic behind this decision was simple: take a 100 customer region as
an example. How many of these consumers
are downloading at full-speed at any given moment? If individual download speeds are capped at 9
Mbps, then 4 could be using every last iota of network performance. Of course, what are the chances that
consumers or businesses could even find something that would tax 9 Mbps of
downstream for any sustained duration?
It quickly became
apparent that usage patterns pointed out that downstream speeds were already
sufficient, but more customers could be serviced by increasing upstream speeds;
the disparity between DOCSIS 1.x’s 38 Mbps downstream and 9 Mbps upstream was
too great, but DOCSIS 2.x’s ratio of 38/27 Mbps was more desirable. Of course, the advances made by DSL providers
and fiber optics would eventually cause the birth of DOCSIS 3.0.
What makes DOCSIS
3.0 different from its predecessors is that it is able to support multiple
channels and bind them together to increase performance. More channels means greater speed, and there
is a 4-channel minimum requirement for DOCSIS 3.0 approved hardware. Each channel offers a familiar 38 Mbps
downstream and 27 Mbps upstream, but there are no limits to how many channels
can be used. This opens up a lot of
performance possibilities, a great example of which is the 100 Mbps DOCSIS 3.x
service available from most ISP to the business customers, in selected areas.
Of course, a DOCSIS
3.0 cable modem with 4 channel support is theoretically capable of downstreams
greater than 100 Mbps, but it is only a matter of time until faster services
are deployed that will be capable of utilizing more channels effectively. Customers would do well to match the right
DOCSIS 3.0 cable modem to the appropriate service, or risk paying for a
broadband service that they are not fully capable of utilizing.
VOIPPosted by DAMERY 2015-03-24 10:25:03
Make & receive telephone calls over the Internet using "Voice over Internet"
VoIP (Voice over IP) enables you to
make cheap telephone calls over a broadband cable Internet connection, or DSL, or
You can connect to regular telephone numbers locally or anywhere else in
the world, by using a VoIP service from an "Interconnected VoIP
In addition, you will usually have low international phone call rates to
other countries. The savings can be substantial, with lower fees and
taxes levied by traditional telephone carriers. Plus, most VoIP providers
offer services with "unlimited" calling plans and an array of
features all for one monthly fee.
A requirement for a VoIP connection is a high speed internet connection,
without packet loss and jitter.
does VoIP work?
1. Analog to digital conversion:
First Voice is converted by an “IP phone” or
an “EMTA” or an “ATA” (Analog Telephone Adapter)
from an analog signal to a digital signal.
2. Digital data transmission :
then sent over the Internet in data packets to a location that will be close to
the destination using Docsis CMTS and Soft- Switch.
3. Digital to Analog conversion :
Then it will be converted back to an analog signal for the remaining
distance over a traditional circuit switch (PSTN) (unless it is VoIP to
VoIP). Your call can be received by traditional telephones worldwide, as
well as other VoIP users.
VoIP to VoIP calls can travel entirely over the Internet. Since
your voice is changed to digital (so that it can travel over the Internet),
other great features such as voice messages to email, call forwarding, logs of
incoming and outgoing calls, caller ID, etc., can be included in your basic
calling plan all for one low price. Many of these special features are great
for the small business person who relies on their phone service to be more an
information center rather than just a telephone.
For more info Contact us
Provisioning & MonitoringPosted by DAMERY 2015-01-29 15:12:44Damery “true-bandwidth usage analyzer"
is making possible the tiered pricing
which is a winning model for consumers
"True, Simple, Fair" : Three
bandwidth usage analyzer from DAMERY allows you the possibility to monitor true
subscriber bandwidth usage, establish the right and neutral bandwidth
management policies that will reduce costs while providing opportunities for
increased revenue.WHY TO USE IT?
The analyzer uses IPDR (Internet Protocol Detail Records). The
bandwidth usage measurement is accurate; what you see is what is really used by
Currently the service
providers offer packages based on speed.
The cheapest package attracts many consumers with a speed that meets
their needs. But these customers on low price
levels may also be some of the highest
bandwidth users, and like most others, they
use these resources during peak
It is possible
to implement monthly data limitations, but that doesn’t avoid that your network
becomes overloaded every day in the early part of the month.
This can be avoided by increasing the network
However , if the subscriber bandwidth usage is not
analyzed and smoothed in the time, and if the higher bandwidth users do not pay
in function of the bandwidth usage, the provider has to take in charge the
totality of the cost for network improvement investment.
This will lead to big financial losses in a long term
The “DAMERY Subscriber Bandwidth usage analyzer» gives
you the ability to accurately measure subscriber bandwidth usage by service
flow and establish for each subscriber a daily and a monthly bandwidth usage
Knowledge of the usage profile
by subscriber will allow you not only to apply right bandwidth management
policies to your subscribers, but this will also allow to adapt your network
capability face to bandwidth demand.
Knowing the daily usage profile of your
subscriber, you will be able to limit the bandwidth usage during the peak hours
by a right pricing policy and extend the life time of your network.
You can now delay to later your investment
to increase the network bandwidth capacity.
usage analyzer Summary
Ø IPDR based data
Ø What is measured is really what is used
Ø Daily monthly subscriber bandwidth usage profile
Ø Possibility to fix bandwidth usage limit to each
subscriber and take required actions when there is an overflow.
Ø Right bandwidth management policies based on the real
Please contact our sales department
Tel: +32 65 22 60 64
Triple PlayPosted by DAMERY 2015-01-29 13:16:55
Damery Triple Play Architecture
Internet / VOIP / IPTV
communication platform based on DOCSIS is able to meet the bandwidth demand
required by the triple play applications.
Complete internet /
VoIP/ IPTV solution based on standard Docsis.
The DAMERY Docsis system offers up
to 800 Mbits bandwidth to the services :
Ø Live TV
Ø Video On Demand
Ø Interactive TV
Ø IP telephony
Meet us to discuss with us your specific demands and how you can
improve data transmission via your network. We are looking forward to meeting