Technology

BTI Systems addresses the increasing demand for packet services, greater optical capacity, dynamic networking, and management simplicity in service provider and enterprise networks.

Expanding the capacity of a single fiber pair up to 400Gbps, BTI’s Intelligent Service Edge solutions enable high capacity wavelength and packet-based delivery of video, storage, wired data, wireless data and voice, and media where and when it’s needed. Comprehensive packet optical capabilities leveraging innovative technology and modular platforms allow BTI to address a diverse range of applications within metro access, metro, and regional network environments. BTI’s solutions provide the means for network operators to affordably increase service network capacity on-demand and cost-effectively.

Packet Optical Networking

Packet optical networking converges Carrier Ethernet and optical service delivery capabilities with fully-featured Wavelength Division Multiplexing (WDM). BTI’s solutions provide Layer 0/1/2 integration in a single platform with extensive SONET/SDH/OTN network interoperability functionality, performance monitoring, and protection capabilities to deliver comprehensive, service-oriented networking.

Leveraging the latest optical technologies BTI solutions provides the best combination of versatility, performance, cost, and space.

Carrier Ethernet

BTI’s entire portfolio is certified by the MEF (Metro Ethernet Forum), and is designed to deliver Carrier Ethernet services to enterprise and service provider customers. Layer 2 architectures such Ethernet Line (E-LINE), Ethernet Local Area Network (E-LAN), and Ethernet Tree (E-TREE) can be implemented in order to deliver the set of Ethernet Services that meet your organization’s unique requirements. These services include: Ethernet Private Line, Virtual Private Lines, Ethernet Internet Access, Multipoint Layer 2 Virtual Private Networks (VPNs), Transparent LAN Service, Multicast networks, Rooted Multipoint L2 VPNs, Broadcast Networks and Telemetry Networks.

The beauty of Carrier Ethernet is that it extends the reach of Ethernet LANs, which is by far the most widely deployed technology in today’s commercial networking environments. The services described above are resilient and extremely versatile, allowing them to be deployed in a variety of environments such as healthcare, government, education, business and residential.

Enhanced Network Performance with G.709 OTN

G.709 OTN provides a digital wrapper that enables efficient multiplexing, provisioning, and switching of packet-oriented, high bandwidth optical services and offers integrated 1+1 50ms facility protection and an in-band General Communication Channel (GCC). G.975 Forward Error Correction (FEC) improves the optical link budget by providing a proactive method to correct errors at the receiver and thereby also reduces regeneration requirements, limiting network costs. Leveraging the Reed-Solomon RS (255/239) coding technique allows correction of up to eight bytes per codeword. BTI utilizes the General Communications Channel (GCC0) byte in the OTN frame overhead to provide in-band management communications.

Simplified Network Interoperability with SONET/SDH

Interoperability with existing network infrastructure is critical; BTI client service modules provide SONET/SDH wavelength encapsulation for transparent interconnection over existing networks. SONET SDH line mapping offers UPSR/SNCP 50ms ring protection switching and ring-based distributed add/drop networking where wavelengths can be shared between multiple sites on a WDM ring and client signals to be cross connected between any location.

Efficient Packet-Oriented Service Delivery with GFP/VCAT

Generic Framing Procedure (GFP) is defined by ITU-T G.7041 and ANSI T1-105.02 standards and is the BTI Systems approach to transporting IP, Ethernet, and Storage traffic efficiently and enabling simplified network interoperability. Framed GFP (GFP-F) is optimized for bandwidth efficiency encapsulating complete frames with a GFP header. Transparent GFP (GFP-T) is used for low latency transport of block-coded client signals such as GbE, Fibre Channel, and FICON.

Virtual Concatenation (VCAT) provides increased granularity to enable services to better fit client bandwidth requirements to allocated WAN bandwidth. This technology allows for increased WAN efficiency as well as expanded market applicability for connectivity services based on the ability to sub-rate bandwidth offers (ie: 300Mbps Gigabit Ethernet Private Line service).

Increased Capacity with WDM Virtual Fiber

BTI’s wavelength plans provide Coarse Wavelength Division Multiplexing (CWDM) and Dense Wavelength Division Multiplexing (DWDM) options. 16 Channel ITU-compliant CWDM provides cost-effective, moderate fiber capacity gains for span requirements up to 100km. 40 Channel ITU-compliant DWDM offers a high-capacity fiber gains or capabilities to extend wavelengths beyond standard optics reach leveraging amplification technologies. Both wavelength plans offer 10 Gbps channel solutions (a new capability in CWDM solutions) providing immense capacity gains over direct-on-fiber alternatives.

BTI’s filter plans provide scalable, low initial first cost by leveraging 1, 2, and 4 channel Optical Add Drop Multiplexers (OADMs) as well as high capacity add-drop with band-based mux-demux WDM filters that can be cascaded to address the entire wavelength spectrum. A 40ch DWDM mux-demux, covering the entire DWDM spectrum, is also available.

Improved Reach Extension

BTI addresses the complex effects on extending the reach of optical signals such as power, Optical Signal-to-Noise Ratio (OSNR), and Chromatic Dispersion with a portfolio of amplification and dispersion compensation modules.

An optical signal transmitted through optical fiber suffers from attenuation due to the physical characteristics of optical fiber, splice loss and connector loss in the transmission cable. Different technologies can amplify the optical signal to compensate for this attenuation, depending on the operating wavelength.

Erbium-Doped Fiber Amplifiers (EDFA) are used to amplify signals in the DWDM wavelength spectrum (1528 nm to 1615 nm). This is achieved by transferring the energy from power laser diodes at 980 nm or 1480 nm to the optical signal. When the erbium ions within the amplifier are excited to a high energy state the doped fiber changes from a passive medium to an active amplifying medium.

Dispersion is a phenomenon that causes the separation of a wave into spectral components with different wavelengths. There is both material dispersion and waveguide dispersion and both variants may be present within a WDM system. Material dispersion comes from a frequency-dependent response of a material to waves. Waveguide dispersion occurs when the speed of a wave in a waveguide (such as an optical fiber) depends on its frequency for geometric reasons. Their combination leads to signal degradation in optical fibers based on the difference in arrival time between different components of a signal at the receiver.

BTI network technology leverages Dispersion Compensating Fiber (DCF) and Fiber Bragg Grating (FBG) dispersion modules to compensate for the effects of dispersion and improve optical reach performance.

Simplified Network Adaptation

BTI provides innovative solutions to address all physical network situations and deliver 16 CWDM or 40 wavelength DWDM network capacity. The passive filter portfolio provides:

Single fiber bi-directional networking capabilities to fully maximize fiber plant infrastructures
1310nm + WDM combiners to integrate legacy connectivity solutions
Hybrid xWDM modules to leverage both CWDM and DWDM on the same fiber infrastructure
larryC-band red/blue filters to maximize optical reach performance

BTI simplifies and expands deployment capabilities to outside plant facilities with extended temperature capable modules. BTI solutions are compliant with the industrial temperature limit requirements (-20°C to +65°C) specified in GR-3108 (Generic Requirements for Network Equipment in the Outside Plant (OSP).

Comprehensive Performance Management

BTI offers comprehensive Performance Monitoring (PM) and alarming across the entire portfolio of client service modules and packetVX™. Performance monitoring, which is available for physical, Layer 1, and Layer 2 attributes (where applicable, based on RMON 2819 Ethernet Statistics), is reviewed in real time or from a historical perspective and provides:

Quality of Service (QoS) statistics
Fault isolation with respect to provisioned service section, line, and path
Automatic protection switching using SONET/SDH or OTN mechanisms
Upstream fault propagation

PMs are essential to Service Level Adherence (SLA) contracts, allowing operators to consistently monitor a network’s load and performance. The BTI 7000 Series supports the collecting and reporting of statistical information that can be used to assess system performance and network health. The operator can retrieve current and historical performance metrics. Historical PMs (also known as bins) for various entities in the shelf can be stored at 15-minute, 24-hour, and untimed intervals. The data collected in 15-minute bins for the most recent 8 hours, one 24-hour bin, and one untimed bin might be available for retrieval. Configurable alarm thresholds are also available for particular PMs.