A new Class of Service for DSL
Up to eight Classes of Service are now available in the IPVPN
product portfolio. CoS is also now available on ADSL access to
IPVPN.
Our converged solutions portfolio has recently been upgraded and
is now able to provide our IPVPN customers with options for up to
eight Class of Service (CoS), This is a first for UK
telecommunications providers.
A new CoS offering is also now available on ntl:Telewest Business
IPVPN DSL services, which range in speed up to 8 Megabits per
second (Mbps). The service has been optimised for real-time
traffic, such as voice over IP. The upgrade ensures that staff in
smaller offices and other smaller business premises can also now
benefit from the application performance improvements that traffic
prioritisation can provide.
With Next Generation Networks (NGNs) now enabling more
sophisticated converged data and voice technologies, the need for
businesses to ensure that their network is delivering the speed and
performance required is becoming increasingly more important. The
availability of eight CoS means organisations have far greater
flexibility than previously in the way in which they protect
their most critical or performance-sensitive network traffic, such
as voice and video, from other less crucial data.
“For the first time, businesses can exert the same control over
traffic on their DSL lines as the rest of the network,” said
Stephen Beynon, MD of ntl:Telewest Business. “This makes the use of
IP voice and other performance-sensitive applications a reality to
all users of the network, not just those on the core. It will mean
businesses really can capitalise on these applications for their
home workers and smaller offices.”
“This level of sophisticated traffic prioritisation puts us head
and shoulders above other UK telcos in our ability to offer next
generation traffic controls. By responding to the fast-changing
needs of our customers, we hope to provide them with the
flexibility and agility they need to support the applications
required for collaborative working in an increasingly mobile
workforce, now and in the future,” said Mr Beynon.
The eight Classes of Service are:
-
Real Time 1: Voice media (real time). These are
typically variable rate applications that require low jitter and
packet loss, plus very low delay. Normally these are Voice over IP
(VoIP) and sensitive video applications that do not have the
ability to change encoding rates, or to mark packets with different
importance indications.
-
Real Time 2: Video media (real time). This is
recommended for delay-sensitive and jitter-sensitive video
applications such as IPCCTV.
-
Customer Control: This is best suited for
peer-to-peer and client-server signalling and control functions,
using protocols such as SIP, SIP-T, H.323, H.248 and Media Gateway
Control Protocol (MGCP).
-
Application 1: Multimedia video streaming,
which are not purely real-time in nature, or business-critical
applications.
-
Application 2, 3 and 4: Business-critical
applications. These three classes are best suited for applications
that require bandwidth and loss guarantees but have a reasonable
level of tolerance for jitter and latency. The application classes
are equivalent to each other in terms of priority; however each can
be guaranteed bandwidth independently of one other.
-
Standard: The Standard service class is for
applications that have not been identified as requiring
differentiated treatment and is often referred to as best
effort.
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