Verizon is undertaking field-tests of XG-PON, which can transmit data at 10 Gbps downstream and 2.4 Gbps upstream, four times as fast as the current top transmission speeds supporting the company’s all-fiber FiOS network.
The XG-PON signal was tested independently on a dedicated passive optical network (PON) as well as overlaid on a fiber providing FiOS service to a customer. The overlay test verified there was no interference between the XG-PON signal and the regular FiOS signal using gigabit passive optical network (GPON) technology and running at 2.5 Gbps downstream and 1.24 Gbps upstream. The test was conducted recently in southern Massachusetts. Previously, Verizon tested the XG-PON signal in the company’s Waltham laboratory.
The XG-PON trial consisted of a new optical line terminal (OLT) installed in the Verizon central office, generating a 10 Gbps XG-PON signal transmitted over a wavelength, or color of light. Two tests were conducted: One test transmitted the XG-PON signal by itself on a separate PON fiber between the central office and a new optical network terminal (ONT) device at a customer’s home. In the other test, the XG-PON stream was merged as a separate wavelength onto an already-operating live fiber running FiOS with GPON at 2.5 Gbps to provide a total downstream flow of 12.5 Gbps. At the customer’s house, the XG-PON and GPON signals were received by ONT devices, showing that the network can simultaneously deliver the GPON and XG-PON signals on the same fiber at the two speeds, without any degradation in service.
Verizon said that XG PON could be used to meet the emerging customer demand for a wide variety of devices and applications that require a network capable of transmitting large amounts of data at very high speeds. The devices and applications could include unicast HD video streaming, ultra-high-definition video, 3D video, user-generated content distribution, video conferencing, and new high-speed data services for medium- and large-business customers.
Final technical standards for XG PON aren’t expected until mid 2010. These initial tests used XG PON equipment from Huawei Technologies. Verizon plans to test and validate the next generation of fiber-to-the-premises (FTTP) technologies from various vendors to help accelerate standards activities.
“From the earliest stages of the FiOS design, we knew we could repeatedly and progressively leverage the immense capacity of fiber to carry more and more data in support of customer applications,” said Mark Wegleitner, senior vice president of technology for Verizon. “Now we’re already working on the best way to take the next leap forward in capacity.”http://www.verizon.com
