||The DNX is a family of Multiservice Access
Concentration platforms that provide solutions for the access network
needs of wireless and wireline service providers. The DNX product suite
has helped revolutionize the way services are delivered. This
breakthrough technology has enabled over 100 service providers worldwide
to deliver services more cost effectively by providing the power of a
mammoth digital cross-connect in a compact and scalable platform, and by
combining unique edge networking features not found in traditional DCS
systems at a fraction of the cost.
All DNX products can accommodate
both narrowband (DS0 to T1/E1) and
broadband (DS3/STS1 to OC3/STM1) applications and are adaptable to a
wide range of networks – wireless service providers, network
overbuilders, IXCs, ILECs, Independents, ISPs, SS7 providers, and
international carriers. Within each of these carrier networks, the DNX
has been employed to solve many different network problems – grooming
and service delivery, port concentration, backhaul consolidation – while
providing the remote test access functionality required to secure
As networks migrate from copper to optical and circuit-switched to
cell-based technologies, the DNX family facilitates these transitions. By
copper-based edge facilities to optical core infrastructures and providing
port concentration and grooming for protocol-based platforms, the DNX
the bridge between present networks and those of the future.
Architecture: Each member of the DNX product family employs a
common mid-plane architecture. At its core, the system features a narrowband
(1/0) switching fabric that has been distributed throughout the system while
incorporating broadband/wideband switching (DS3/DS1/VT/VC) within the same
fabric. The non-blocking switching fabric can accommodate more than 600 T1
or 500 E1 interfaces, 24 DS3 or STS1 interfaces and up to 8 OC3/STM1
interfaces. Additionally, all interfaces can be protected on an N+1 or 1+1
basis depending on the interface type, along with 1+1 redundancy in the
common elements. The DNX is a true carrier class product with NEBS-Level 3
compliance and an array of network management options.
System Management: Network Operations personnel can perform
configuration, provisioning, and a wide variety of diagnostic tests from a
menu-driven user-interface or a comprehensive element management platform.
The DNX provides an embedded multi-level security scheme through a
craftsperson interface, telnet, SNMP, or dial-up (internal modem)
interfaces. Audit trails, circuit naming and configuration uploads and
downloads are just a few of the features included. System enhancements are
made available online at no charge and are facilitated using TFTP and Flash
memory, making the DNX cost of ownership lower than competitive offerings.
Reliability and Redundancy: The DNX family offers redundancy at
all levels of operation. Redundant System Management Controllers (SMCs)
provide central control and offer internal stratum 3 timing with holdover
and hitless switchover, ensuring no service interruptions. The DNX-11 and
DNX-88 can be configured with AC or DC redundant load sharing power supplies
with independent inputs from power distribution panels. Power supplies are
monitored and provide alarming in the event of a failure.
Protection Switch provides redundancy on electrical interfaces including
T1/E1, DS3 and STS1 on an N+1 basis. This allows the DNX to be optionally
deployed with redundancy without burdening the base system cost. The PSX,
used with the DNX-11 or DNX-88, ensures that service outages due to
equipment failure will not jeopardize a carrier’s desire to provide 99.999%
Application modules interface with the
Manager modules by means of twin communication busses on the DNX
midplane. Utilizing redundant paths to control modules within the DNX nest
is another way to ensure that access to system modules and interfaces is
available when needed.
All of the systems modules are Hot Swappable. Utilizing non-volatile
FLASH memory, the DNX Application, Interface and System Manager modules can
be readily upgraded as new features are made available.