Verizon is moving toward a technological upgrade of its FiOS system to XG-PON technology and plans to issue a request for information (RFI) at the end of this year after conducting more technical trials with XG-PON equipment from various vendors.

Verizon said it just wrapped a second successful field trial, this one using Motorola's XG-PON technology, establishing a 10 Gbps downstream connection to a FiOS customer.

FiOS was originally rolled out using BPON, and was then upgraded to GPON when that technology became commercially available. Verizon gets its GPON products from Motorola and Alcatel-Lucent.

XG-PON is another name for 10 Gigabit PON. Verizon's first XG-PON trial was last year, using equipment from Huawei.

The latest trial, using Motorola technology, was designed to simulate what two different customers in the same household might experience while using their PCs to download, upload or share files. During the test, the installed optical network terminal (ONT) received a 10 Gbps feed (2.5 Gbps upstream) and provided two simultaneous streams to two different PCs through two separate data ports. Combined, the two ports delivered approximately 1.85 Gbps in aggregate bandwidth in each direction, Verizon said.

Speed tests were performed to Verizon's speed test server located more than 400 miles away in Reston, Va. (the test home was in Massachusetts), and realized speeds of up to 915 Mbps between the PC and the speed test server, according to Verizon.

Verizon's latest groundbreaking field test used Motorola equipment deployed with dual fibers from an OLT (optical line terminal) in a Verizon switching facility to a combiner that coupled the XG-PON system with the existing GPON system, Verizon explained. This is an approach covered in the standards. The dual fiber linkage is seen as a way to reduce the overall costs of XG-PON and is under investigation by suppliers and service providers. On the customer-facing side of the network, the test data traveled over a single FiOS fiber link to the customer test location.

"We continue to explore technologies that will allow Verizon to further evolve our FiOS network toward the functionality and speed the market will require," said Mark Wegleitner, senior vice president of technology for Verizon. "As an example, it would take a customer less than three minutes to download a 20-gigabyte Blu-ray movie over a 1 Gbps link, as opposed to close to four and a half hours over a 10 Mbps Internet connection. A business customer using this service could backup data on an online server every night in just a few minutes, as opposed to hours."

Separately, Verizon said it completed a field trial carrying 100 gigabit-per-second Ethernet traffic on a metropolitan Ethernet infrastructure. Using Alcatel-Lucent equipment deployed in Verizon's Switched Ethernet Services (SES) network, the trial successfully transmitted data over 7.9 miles of field fiber in the company's Dallas area network.

The trial used existing Alcatel-Lucent 7450 switching equipment with new plug-in cards to place native 100 GE traffic on a single fiber, creating the high-speed links.

"Our goal is to show 100 GE can be carried on a metro network and do it with current equipment that avoids major changes – and the associated costs – to the existing network infrastructure," said McManus.

Alcatel-Lucent's 7450 ESS nodes used 100 GE service interfaces with 100G BASE-LR10 optics, which provide low-cost, high-bandwidth transport over distances of up to 10 kilometers (6.2 miles). Verizon is at the forefront of accelerating the availability and adoption of 100 GE technology.

More Broadband Direct 6/23/10:

•  Comcast's thePlatform extends reach to OTT, IP devices
•  RGB Networks buys RipCode
•  Verizon open to 10G PON bids in 2011
•  Cox Business' security suite goes nationwide
•  Report: Hulu in talks with CBS, Viacom ahead of subscription fee launch
•  FCC OKs Verizon divesture to AT&T
•  CTIA ditches San Fran over handset rule
•  Broadband Briefs for 06/23/10