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Below is the abstract for Anue
Systems' white paper titled "Performing Next Gen SONET Testing using
a Network Delay Emulator " To download the entire white paper,
please click the underlined title above
Performing Next Gen SONET Testing
Using a Network Delay Emulator
In the world of data communications, high speed networking over
large distances is the wave of the future. Everywhere, information is
moving faster. Data rates are rapidly increasing from 100 megabits per
second (Mbps) to 1 gigabit per second (Gbps) to 10 Gbps. At the same time,
the world is shrinking. Sending digital information around the globe will
soon become as easy as sending it across the office.
Communications technology companies have made great strides in their networking
products, which is accelerating the move to higher speed communications.
In addition, service providers have laid enormous amounts of high-speed
fiber optic cable to transmit data over long distances. However, these
efforts have been limited by a significant gap between two well-established
but separate methods for transmitting data:
Ethernet, the dominant method for sending data over short distances, such
as local area networks (LANs), and
SONET, traditionally used to carry voice traffic over long distances (i.e.,
thousands of miles) of optical fiber.
SONET is circuit based; Ethernet is packet based. SONET is continuous;
Ethernet is “bursty.” SONET bandwidth is defined by OC rates
(see Table 1) that do not match the 10/100/1G/10G Ethernet rates. Nonetheless,
both SONET and Ethernet are pervasive and here to stay. There are hundreds
of SONET Rings in operation today, and in 2002, 450,000 OC-48 SONET ports
were added worldwide. The Ethernet market is even larger. Already a multi-billion
dollar market, Gigabit Ethernet (GigE) equipment revenue could reach $44
billion by 2005.
Though developed to carry voice traffic, SONET is now being adapted to
carry data. Promising new technologies have been developed to send packetized
data over the huge installed base of SONET rings around the world. In
addition to Ethernet, other protocols -- such as IP, ATM, SDL, HDLC, Fibre
Channel, etc. -- can be transmitted over long distances via SONET using
these new technologies. In particular, Generic Framing Procedure (GFP),
Virtual Concatenation (VC) and its associated Link Control Access System
(LCAS) are open standards that have been dubbed “The Holy Grail
of SONET” by industry experts. These open standards enable the sending
of high-speed data (like Ethernet) over SONET.
Since 1997, Gillaspy Associates has built
a solid reputation for developing strong relationships with our customers
by providing quality solutions and ongoing support.
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Gillaspy currently offers the following training courses:
SAS
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