Technology and business drivers for passive optical LANs

2012-10-23 11:49:17

Passive optical LAN (POL) technology platforms optimized for enterprise LAN environments have become available only in the last couple of years from such companies as Tellabs and Motorola (recently acquired by Google). Yet, this technology – which enables a singlemode fiber-to-the-desktop architecture for the LAN – is quickly gaining traction in the market.

POLs are finding their place deeper within the LAN to meet the needs of very large and demanding Layer 2 switched applications. And it’s easy to see why1:
scalability and reliability
2.ease of use and administration savings and environmental sustainability
4.high-bandwidth connectivity
5.advanced security
disruptively low total cost of ownership (savings in initial capital equipment cost as well as ongoing operational cost).
Decision makers are increasingly choosing to forgo the status quo and take advantage of what POLs have to offer for the long-term benefit of their organizations.

Mature and reliable technology
POL network equipment is compliant to the ITU-T G.984 Gigabit Passive Optical Network (GPON) technology standard. PON technology was developed for and deployed in the U.S. by Verizon (for FiOS triple-play services) and by many other telecom operators around the world. The FTTH Council Europe estimates that PON architectures currently make up 20% of FTTP/H access networks around the world, and that number is growing.2 And in the U.S., over 64% of broadband FTTH deployments use PON technologies, 51% of which is GPON.3

POL customers benefit from the widespread adoption of ITU G.984-compliant GPON equipment for FTTH in three ways.1.Equipment prices are being driven down by world demand.
2.POL equipment has been designed to the highest specifications in the harshest outside plant environments and typically achieves the stringent so-called five-9s of reliability (99.999% uptime) to meet telecom operators’ standards. (Typically, Ethernet switches are designed to less stringent requirements.)
3.FTTH deployments have scaled to support millions of users and diverse services while enabling very efficient remote management and maintenance for the entire network via software features. POL vendors offer the same robust server and client network element management software (albeit with added enterprise-centric software enhancements) for the enterprise environment, which provides powerful operational, administration, and maintenance (OAM) functionality. In addition, POL vendors typically offer various scalable software licensing packages to optimize their offerings relative to the size of the network.
Environmental sustainability POL technology’s energy savings and environmental sustainability stem not necessarily from what it has, but from what it doesn’t have.

A typical large Layer 2 switched Ethernet campus network (as depicted on the left side of Figure 1) requires multiple levels of aggregation at the campus distributor, building distributor, and floor distributor/communications closet. Multiple layers of switches are required to aggregate the traffic back to the core-routed network. The layers are also required because the various cabling media choices used with traditional active Ethernet networks are limited in performance over a specified distance due to signal attenuation and other performance parameters (as per IEEE and TIA standards specifications). Cat 6A copper cabling for the horizontal links, for example, is specified to support 1 or 10 Gigabit Ethernet up to a 100-m limit (328 ft), while multimode dual fiber connections for the backbone links can support 10 Gigabit Ethernet up to 2 km.
The above information is edited by 10GTEK.
10GTEK TRANSCEIVERS CO., LTD (Hereinafter refered to as 10GTEK) is specialized in developing and manufacturing Fiber Optical Transceivers and High Performance Cables which are wildly applied in Datacom, Telecom and CATV, providing customers with top quality and cost effective products. Our High Speed Cables cover Passive SFP+ Cable, Active SFP+ Cable, QSFP+ cables, MiniSAS (SFF-8088) Cables, CX4 Cables, Harness cables, Breakout Cables, Patchcords. We also manufacture Fiber Optic Transceivers like 10G XFP, 10G SFP+, SFP DWDM/ CWDM, GBIC, etc. The prompt response and excellent customer support contribute to clients‘ full satisfaction.Today, 10GTEK has been growing fast in the optical field for its unique and competitve excellence which has got a high attention from datacom and telecom.
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