CWDM Supplement
COE Group plc COE develops and supplies analogue and digital video surveillance (CCTV) systems for complex and robust applications. These end to end systems include fibre transmission, analogue and digital switching, control, display, and network video recording. COE's high quality solutions are well regarded and deliver high performance year after year in rugged environments. Our established digital range has been used in high profile installations worldwide to enhance existing analogue systems, reaping the maximum benefit from the installed analogue base. The digital suite of products includes the X-Class codec - the first card in the industry to offer 4CIF MPEG4/MJPEG at 25fps. With over 16 years of expereince in the CCTV industry. COE s engineers provide extensive services in design and commissioning and have been involved in designing some of the most complex CCTV networks in operation today. Our systems are live in high profile installations worldwide including urban centres, traffic control, mass transit, military and industrial sites across Europe, Asia and the USA. Contents COE X-Net CWDM Concept...3 Features & Benefits...4 COE X-Net Optical Modules...5 COE X-Net CWDM Modules...6 CWDM Applications...7 CWDM Order Codes & Descriptions...10 CWDM Product Specification Summary...11 2
X-Net CWDM System COE X-Net CWDM - The Concept COE X-Net is a comprehensive video transmission and management system for fibre optic and Ethernet based networks. It employs the latest laser and digital encoding techniques for the transmission of video and associated signals, therefore guaranteeing video image quality even on the longest links. Optical multiplexing technology successfully employed in very large system deployments (London Congestion Charging or Delhi Metro Rail Corridor for example) has now been incorporated into the COE X-net range. This supplement to the X-Net Product Brochure describes the technology, its applications and benefits. Optical Multiplexing Optical multiplexing is commonly referred to as DWDM or CWDM technology: Dense Wavelength Division Multiplexing or Coarse Wavelength Division Multiplexing. As the acronyms suggest, each method provides a number of different wavelengths that can be used for information transmission within the fibre and both may be deployed in optical surveillance networks. Both DWDM and CWDM lasers are highly tuned devices that allow the optical spectrum form 1270nm to 1610nm to be split into a number of "optical channels". These channels, or wavelengths, can then be used by COE X- Net to send video and data thus multiplying the video channel count by the number of wavelengths employed within the same fibre. This has a dramatic effect on the video channel count available since traditional optical techniques would dictate two wavelengths only: 1300nm and 1550nm. The choice of CWDM and DWDM is defined by channel requirements and cost considerations. Typically CWDM is the lower cost option as the lasers are not as highly tuned. However, there are only 18 wavelengths available as opposed to DWDM where up to 96 wavelengths are available. 3
Features and Benefits Multiple wavelengths are available on the same optical fibre - The COE X-Net system can support up to 144 video channels on the same fibre thus expanding the fibre capacity dramatically. Uses industry standard wavelengths - Ensuring long term support and flexible transmit power options to suit a variety of transmission distances (Optical budgets up to 37dB are supported). All COE X-net video modules support the technology - Low risk, low cost and fast upgrade path for existing network with little disturbance to existing field deployed fibre system. Supports video, audio, data, Ethernet and contact closure transmission - No limit to signal types across the fibre network Interchangeable industry standard SFP (Small Form-factor Pluggable) optical fibre interfaces - can be swapped on-site, thus allowing for flexible re-configuration or repairs of the system and reducing the spares holding costs. Complex fibre networks can be constructed - Dual redundant, duplex, star, linear and ring topologies may be realised. State of the art SFP optics and LC connectors Small Form-factor Pluggable (SFP) optics are rapidly becoming the de-facto standard for all Ethernet switches and telecommunications fibre transmission. X-Net is the first product to embrace this new technology within the CCTV fibre transmission arena. SFP optics offer numerous advantages: Easy on-site optical replacement In-built laser status diagnostics The individual alignment approach in the LC consistently results in superior insertion and return losses for both multimode and singlemode applications - typically <0.1dB. The fibre spacing in the LC provides an inherently better transceiver connector for both multimode and singlemode applications. A single duplex or twin fibre module can be presented in the same housing allowing for greater flexibility and cost options. 24 million LC connectors were shipped worldwide by a single vendor alone by the middle of 2004. 4
COE X-Net Modules COE X-Net Optical Modules The X-Net optical transmission system incorporates the latest digital transmission and laser optic technology to provide high quality video transmission for PAL or NTSC analogue video signals with associated data, audio and contact closure channels. Aimed at the professional CCTV, Surveillance and Transport video markets, the range of X-Net Optical modules meets all key specifications of these demanding environments. Following are a few of the variants from the X-Net Optical Module family: Video I/O (BNC) Contact Closure (RJ45) Audio Ch1 (RJ45) Audio Ch2 (RJ45) Data Ch1 (RJ45) Data Ch2 (RJ45) Optical I/O (LC) Video I/O (BNC) Data Ch1 (RJ45) Contact Closure (RJ45) Optical I/O (LC) X-Net OPT-1 X-Net OPT-4 X-Net OPT-1T/R - MAX X-Net 1 x simplex video channel transmitter or receiver module, including 2 x duplex data, 2 x duplex audio, 2 x duplex contact closure channels - Utilises 1 rack slot. X-Net OPT-4T/R - PTZ X-Net 4 x simplex video channel optical transmitter or receiver module, including 1 x duplex data, 2 x duplex contact closure channels - Utilises 1 rack slot. Video I/O (BNC) Video I/O (BNC) Data Ch1 (RJ45) Data Ch2 (RJ45) Data Ch1 (RJ45) Data Ch2 (RJ45) Contact Closure (RJ45) Audio Ch1 (RJ45) Contact Closure (RJ45) Audio Ch1 (RJ45) Optical I/O (LC) Audio Ch2 (RJ45) Optical I/O (LC) Audio Ch2 (RJ45) X-Net OPT-4D X-Net OPT-8 X-Net OPT-4T/R - MAX X-Net 4 x simplex video channel optical transmitter or receiver module, including 2 x duplex data, 2 x duplex audio, 2 x duplex contact closure channels - Utilises 2 rack slots. X-Net OPT-8T/R - MAX X-Net 8 x simplex video channel optical transmitter or receiver module, including 2 x duplex data, 2 x duplex audio, 2 x duplex contact closure channels - Utilises 2 rack slots. 5
COE X-Net CWDM Modules COE X-Net CWDM Modules Aimed at the professional CCTV, Surveillance and Transport video markets, the range of X-Net CWDM modules meet all key specifications of these demanding environments. Following are a few of the variants from the X-Net CWDM Module family: X-Net CWDM-4/8 These passive optical modules can provide 4 or 8 optical ports tuned to different CWDM wavelengths. Wavelength selection is defined at point of order to suit system requirements. A common optical port is provided for connection to the trunk fibre.- Utilises 1 rack slot or can be housed within an X-Net Box. X-Net CWDM-12/16 These passive optical modules can provide 12 or 16 optical ports tuned to different CWDM wavelengths. Wavelength selection is defined at point of order to suit system requirements. A common optical port is provided for connection to the trunk fibre.- Utilises 2 rack slots or can be housed within an X-Net Box. X-Net Add & Drop Multiplexer ADD/DROP multiplexer. This passive optical component is a wavelength specific optical coupler for breaking out or adding in specific CWDM optical wavelengths to the trunk fibre. Please contact COE for wavelength selection - Utilises 1 rack slot or can be housed within an X-Net Box. X-Net Optical Switch Two-way optical switch option for automatic dual redundant fibre management. Switches from primary to secondary fibre in response to optical alarms from X-Net OPT Receive units. 6
COE X-Net CWDM Applications In order to understand the flexibility of CWDM technology, we have provided several application examples below. Each employs the technology in a slightly different way. It is impossible to show all options within the scope of this brochure and we would encourage you to contact us with your specific design needs where our Technical Services team will be happy to help you. Example 1: Point to Point High Channel Count Link Figure 1 below shows a simple point-to-point system where 8 optical wavelengths have been employed to provide two-way transmission on one optical fibre. Standard COE X-Net modules have been used for the interfaces to the various video and data signals. Each COE X-Net module is fitted with a CWDM laser TX/RX unit. The individual optical connections are fed to the X-Net CWDM optical multiplexer module for multiplexing onto the trunk fibre. This configuration enables the User to: Increase video channel count from 8 to 144 (using COE X-Net OPT-8T modules) Increase auxiliary data/audio/contact channels as required Channels may be configured for transmission in either direction Keep within one 4U X-Net chassis space Figure 1. This example provides a very flexible point-to-point link with high channel count at low cost increments. 7
Example 2: Multipoint to point airport system In this example, the use of a passive optical coupler enables a split system to be realised. Through careful selection of the individual wavelengths, see Figure 2, three discrete locations are connected. Each location has video/data comms channels available and channel count/configuration may be easily changed by simply swapping the X-Net modules around. Transmission may be in either direction of course so that a complex video communications system can be realised. Figure 2. Further transmission points may be added and the number is only dictated by the optical budget limitations of the fibre network This configuration enables the User to: Build a multiple point surveillance network utilising just one fibre Allocate video/data channels as required Build in capacity expansion for future requirements Realise a low cost, flexible optical network with the minimum of components 8
Example 3: Linear, dual redundant railway transmission system In this example the use of wavelength dependent ADD/DROP multiplexers (ADM's) enables us to realise a two-fibre dual redundant video network. Figure 3 shows the design. Each Station uses two wavelengths to transmit/receive video and data. Two ADM's are employed at each Station to manage the allocated wavelengths. The ADM's are low loss devices to ensure maximum optical path loss is available for the trunk fibre. Each Station also employs a 2:1 optical coupler and splitter for MAIN/BACK-UP fibre signal integration and the selection of which fibre to use is carried out at the Control Room via the X-Net CWDM & Optical Switch module. This module has an automatic selection control system for live fibre selection, therefore upon the failure of a fibre route automatic switch-over is achieved. Figure 3. This design may be expanded in many different ways including incorporating the techniques from the previous two examples. Hence complex topologies may be realised. Example 4: Perimeter security optical infeed system In this example the use of wavelength dependent ADD/DROP multiplexers (ADM's) enables us to transmit camera video and control signals from multiple locations onto a single fibre optic cable. Figure 4 shows the design. Each collection point uses two wavelengths to transmit/receive video and data. In this example two seperate fibre system are interlaced to provide an additional level of fibre redundancy. The design may be expanded to incorporate up to 8 collection points per fibre. Figure 4. 9 9
CWDM Product Order Codes & Descriptions COE Part Code Description X-Net CWDM Modules: X-Net CWDM4* X-Net CWDM4R* X-Net CWDM8* X-Net CWDM8R* X-Net CWDM12* X-Net CWDM12R* X-Net CWDM16* X-Net CWDM16R* X-Net 4 channel Coarse Wave Division multiplexer module (TX Location)- 9/125um Singlemode, LC Connectors - utilises 1 rack slot X-Net 4 channel Coarse Wave Division multiplexer module (RX Location)- 9/125um Singlemode, LC Connectors - utilises 1 rack slot X-Net 8 channel Coarse Wave Division multiplexer module (TX Location)- 9/125um Singlemode, LC Connectors - utilises 1 rack slot X-Net 8 channel Coarse Wave Division multiplexer module (RX Location)- 9/125um Singlemode, LC Connectors - utilises 1 rack slot X-Net 12 channel Coarse Wave Division multiplexer module (TX Location)- 9/125um Singlemode, LC Connectors - utilises 2 rack slots X-Net 12 channel Coarse Wave Division multiplexer module (RX Location)- 9/125um Singlemode, LC Connectors - utilises 2 rack slots X-Net 16 channel Coarse Wave Division multiplexer module (TX Location)- 9/125um Singlemode, LC Connectors - utilises 2 rack slots X-Net 16 channel Coarse Wave Division multiplexer module (RX Location)- 9/125um Singlemode, LC Connectors - utilises 2 rack slots X-Net Multiplexer Modules: X-Net A-xx* X-Net AxxDyy* X-Net A-xx-TR* X-Net Add Multiplexer cassette - 9/125um, Singlemode LC Connectors - Utilises 1 rack slot. X-Net Add & Drop Multiplexer cassette - 9/125um, Singlemode LC Connectors - Utilises 1 rack slot. X-Net Twin redundant Add Multiplexer cassette including optical splitter - 9/125um, Singlemode LC Connectors - Utilises 1 rack slot. X-Net A-xxD-yy-TR* X-Net Twin Redundant Add & Drop Multiplexer cassette including optical coupler/splitters - 9/125um, Singlemode LC Connectors - Utilises 1 rack slot. X-Net Optical Switching: X-Net OPT-SWITCH X-Net Optical Switch-- 9/125um Singlemode, LC Connectors - utilises 1 rack slot (Note: X-Net NMS module required). X-Net CWDM SFPs: X-Net SFP CWDM-xx* X-Net SFP Upgrade Module, Twin LC Connectors, Wideband Receiver, 1270-1610nm Laser, 19dBm optical budget. X-Net SFP CWDM-xx-HP* X-Net SFP Upgrade Module. High power version, Twin LC Connectors, Wideband Receiver, 1270-1610*nm Laser, up to 37dBm optical budget Box Kits: X-Net BOX-Single X-Net BOX-Double X-Net Module box housing kit - Single Unit X-Net Module box housing kit - Double Unit *18 wavelengths are available. Please contact COE for wavelength selection. 10
CWDM Product Specification Summary COE X-Net Part Add Drop CWDM4 CWDM8 CWDM12 CWDM16 Wavelengths 1270nm -1610nm @ 20nm Spacing Optical Loss Insertion Loss <1.5dB <2.5dB <3.5dB <5.5dB <7dB Through Loss <1.5dB <1.5dB <1.5dB <1.5dB <1.5dB Return Loss >45dB >45dB >45dB >45dB >45dB Temperature Operating (deg C) 0 to 70 0 to 70 0 to 70 0 to 70 0 to 70 Storage (deg C) -40 to 85-40 to 85-40 to 85-40 to 85-40 to 85 Connectors LC Mechanical X-Net Rack Slots 1 1 1 2 2 X-Net Box- Single - - Dimensions (mm): 170 x 180 x 33 X-Net Box - Double - - - Dimensions (mm): 170 x 180 x 63 For further information regarding the COE X-Net product range please consult the X-Net Product Brochure or contact COE directly using the contact details provided overleaf. 11
COE Locations COE Limited Headquarters Photon House Percy Street Leeds LS12 1EG Email: sales@coe.co.uk Web: http://www.coe.co.uk Tel: + 44 113 230 8800 Fax: + 44 113 279 9229 Asia Pacific Branch Office No. 3 International Business Park #03-25 Nordic European Centre Singapore 609927 Tel: + 65 6325 6018 Fax: + 65 6223 0372 Brochure Revision 1 Release Date August, 2006 12