Passive Optical LAN Design Guide
Contents
1. room on e 4 A48 port patch Ist floor panels 1 EEE l EE f nT e Core switch router e Fiber patch panel e 1 Rack e 1 Fiber strand from splitter e 4 Category 6 cables with patch 1 ONU cords from switch e Copper patch cords A ae 6 switch ports in telecom close e Bandwidth available 1GB cialis aad a e Bandwidth available 1GBps e Bandwidth needed lt 100Mbps to support IPTV VolP e Bandwidth needed lt 100Mbes to irae ceca support IPTV VoIP Internet access Table 5 This compares a POL solution versus the traditional switch solution for a hotel project BICSI 2013 21 Using a traditional design the telecom room on the main floor would need one core switch router four 48 port switches four 48 port patch panels and 168 Category 6 drops Each floor would require a rack in the telecom room four 48 port switches four 48 port patch panels and 168 Category 6 drops Compare this to the POL design which would need only one OLT and one fiber patch panel in the telecom room Each floor would need a fiber wall box with passive splitter and one SMF lead to the ONU for each room The POL design was able to replace the edge switches on each floor by passive optical splitters eliminating the need for a separate telecom room on each floor The reduced equipment and corresponding space as well as network installation time and maintenance savings have a significant posi2. Easy and flexible deployment e Nonblocking architecture e 2x SCM e 2 x PSM 48VDC e 2 x LIM line interface module of either eight ports of 1GE card or four ports of 1OGE card e 8x PIM of eight ports of 1G EPON card or 2 5G GPON card e 960Gbps switching capacity e Maximum power consumption 520VV e PON optics support laser class B C e PON Ranging typical 20km maximum of 60km e EEE 802 3ah 1G EPON compliant e ITU T G 984 2 5G GPON compliant The C9264 supports almost every feature currently available to IT administrators flexible VLAN contiguration statistical trattic monitoring and Quality of Service QoS control The 19 inch 8RU chassis features front access for easier maintenance and full redundancy for all critical components including the PSM SCM and LIMs The C9264 can be contigured as either GPON or EPON networks and all modules are hot swappable for easy upgrades The PIMs of C9264 are fully compatible with those of the C9016 OLT C9500 The C9500 OLT is a high density high capacity and highly featured GPON OLT Figure 5 It can support up to 80 1Gbps or 1OGbps EPON ports or up to 5120 ONUs with up to 160Gbps uplink bandwidth Built on the latest Layer 3 switch platform it provides all the equipment needs for today s TPS Enhanced capacity and traffic management capabilities enable future services as well Fulltredundancy SCM and PSM design also improve system and service reliability Additionally the C9500 offe
3. For EPON environments CommScope offers the CS 6204W CS 8001A and CS 8004A desktop ONUs The CS 6204W provides four RJ45 Ethernet ports IEEE 802 3 10 100 Base TX and IEEE802 11 b g n WiFi ability as well as two plain old telephone service POTS interfaces It comes with a 12Vx2A power supply and has a maximum power consumption of 12VV The CS 8001A not shown is a single user ONU that provides one RJ45 IEEE 802 3ab 10 100 1000 Base T Ethernet port It uses a 6Vx2A power supply with maximum power consumption of OVW The CS 8004A is similar to the C 8001A except the CS 8004A provides four 10 100 1000 Base T ports 10 ONU models are periodically introduced and discontinued so check the CommScope website for the most up to date information Selecting the appropriate desktop ONU will depend entirely on the unique requirements of your environment All CommScope EPON ONUs for the desktop are IEEE 802 3ah compliant and support explicit 1 Gbps symmetric upstream and downstream link Some such as the CS 8001A also support Turbo EPON allowing EPON to run at 2Gbps down 1Gbps up data rates for certain applications Some are DoD JITC certitied for use in U S military and government applications Some are also certified for DOCSIS Provisioning ot EPON DPoE by Cablelabs for use in cable service provider applications This ensures interoperability among other DPoE compliant units and increases the number of vendor choices available for
4. ditterent POL intertaces They are not interchangeable The right type of connector must be used for each interface 13 a og rA A a b c d le LG AUPE SG Ue SC APC LC SAPC SC APC LC APC duplex simplex simplex simplex mechanical splice simplex Figure 10 These types of fiber connectors can be used in the POL system Figure 10 a The interface for OLT uplink transceivers 1Gbps SFP 10Gbps SFP or 10Gbps XFP uses a duplex LC UPC ultra physical contact fiber connector Figure 10 b All OLT PON transceiver interfaces and most workgroup ONUs accept simplex SC UPC fiber connectors Figure 10 c All desktop ONUs use a simplex SC APC angled physical contact fiber connector Figure 10 d Within the ODN LC APC connectors are recommended for all connections to ensure a low return loss RL and minimal RL induced noise and effect on laser stability Although both SC APC and LC APC versions of optical splitters are available the LC APC version is recommended for higher port density Figure 10 e For field terminations CommScope offers a high performance no polish mechanical splice quick connector that is installed with a simple and reliable field tool Please refer to corresponding product documents on our websites for detailed information Other fiber optic accessories Other fiber optic accessories needed when designing an ODN include fiber patch panels Tip wall mount fiber enclosures wall outlet fiber face
5. for video overlay are needed to evaluate the insertion loss IL and RL of each optical link An optical time domain retlectometer OTDR is also a good tool for troubleshooting optical links There are many optical laser source and power meters that can be used for ODN testing Figure 15 shows an example of a combined laser source power meter designed for POL ODN testing The laser sources include 1300nm 149Onm and 1550nm The power meter has an integrated OTDR meter Detect Live POW Measure PON Power din Fitz PON Sienulatar Feeder OTOR Test 1625 nm TER rd TEE using CW Source obs iln 1490 or 1520 m imi OFL 280 7103 PLAS 703 Figure 15 A POL ODN test schematic diagram is illustrated Because POL is still relatively new in the market the standard organizations are in catch up mode The Telecommunications Industry Association TIA has added some POL related content TIA 568 C 0 2 20 12 Generic Telecommunications Cabling tor Customer PremisesAddendum 2 General Updates published August 2012 includes a definition of the splitter and channel attenuation with a splitter It also adds PON technologies to SMF application tables which provides guidelines for PON application support over distances Secure features of PON The POL solution has multiple contigurable system alarms providing reliable information security For example POL systems enable IT personnel to identity and quarantine rogue ONUs and provide
6. media access control MAC filtering for blacklisting and whitelisting end user devices There are also security solutions for government facilities requiring communication networks with physical security and alarm monitoring In cases where network cabling is used to transmit unencrypted classified National Security Information NSI through areas of lesser classification or control a POL solution can be combined with either hardened or alarmed carriers For more information on secure PON or SPON refer to other CommScope literature specitic to that subject 18 Network management CommScope POL solutions provide network administrators three options for accessing and managing their EPON or GPON networks Command line interface CLI e Element management system EMS e Simple network management protocol SNMP Each of these methods enables administrators to manage configuration settings active components alarms and more Command line interface CLI CLI enables the IT support staff fo use thousands of commands to control and configure the POL Command lines can be connected directly to the OLT system control unit or ted remotely using a Telnet connection through a TCP IP network Please refer to the reference documents OLT C9016 User Manual and OLT C9500 User Manual for detailed CLI information Element management system EMS Element management system EMS is an optional standalone GUl based network management package tha
7. numbers of the output ports and sends it downstream to the ONUs For upstream trattic the splitter serves as a passive aggregation point combining the 1300nm optical signals trom the ONUs to the OL Although there are different passive optical splitting technologies available today the planar lightwave circuit PLC based optical splitters are usually chosen for FTTx deployments This is mainly because PLC optical splitters are based on a quality repeatable semiconductor water process which results in uniformly high performance and low cost high volume production Typical split ratios trom commercially available splitters range trom 1x2 to 1x64 and beyond Due to the compromise of link loss budget and the bandwidth sharing requirements the typical ratio for POL is 1x32 Figure 9 below illustrates a few of the optical splitters within the CommScope POL portfolio They include the 1000 Series LGX splitter and the rack mount IRU splitter Each is available with variety of split ratios and either SC APC or LC APC connectors As stated earlier the split ratios should be determined by the geographic distribution of the user groups shared bandwidth expectations and optical link loss budget Pee eeeeeeeeeenean a 1x16 LGX SC APC splitter b 1x32 TRU LC APC splitter Figure 9 Here are examples of CommScope optical splitters Fiber connectors Several kinds of SMF connectors shown in Figure 10 are designed to be used with
8. the BOM for a campus business building project In this project one EPON C9264 OLT is required with six eightoort 1Gbps EPON PIU cards and 48 total EPON ports with 45 of them connected to 1x32 splitters at different locations A total of 1036 fourport ONUs are required for this initial deployment A total of 4144 users can be supported with this deployment Please refer to the CommScope product catalog for actual product ID and detailed product information BRAND DESCRIPTION PRODUCT ID u m QUANTITY TeraSPEED Panel 1 Aaah Black With 6 Duplex SC PNLBK 012 AFA SCO2 GR Uniprise SC APC Qwikll Connectors No Polish Connector SCAPC SM Flat 760184689 PKG 4 Splice 250 900 25 package SFC SCF 09 8A 25 PACK SYSTIMAX ONU Unit 4 Port 760168914 EACH 1 036 SYSTIMAX OLT Cards based on 8 Ports Each Line Card PIM 8E EPON Interface 76016901 1 EACH Ll 2 3 unpre 2Pos facts RASABok i ena a Table 4 This gives an example of a BOM for a campus building project 20 Example 2 Five story hotel Table 5 shows the equipment comparison of the POL solution versus the traditional switch solution for a hotel project The hotel has five stories and 42 rooms per floor POL DESIGN TRADITIONAL NETWORK DESIGN e 1 PON OLT e 168 Category 6 drops w 12 3 14x42 e 1 Fiber patch e 4 48 port switches panel JOTT BALILIN ilii Mai e 4 48 port switches ain equipment 1 Rack e 4 A48 port switches
9. use in enterprise environments All CommScope GPON ONUs are ITU T G 984 compliant for support 2 5Gbps downstream 1 25Gbps upstream asymmetric data rates Workgroup ONUs Workgroup ONUs are designed to provide shared bandwidth to all users or devices within a specified area and feature more user ports than the desktop ONU CommScope workgroup ONwUs shown in Figure 7 provide either eight or 24 ports CommScope workgroup ONUs can be tlatmounted or rack mounted In either case it is strongly recommended to use a secured enclosure that provides physical mechanical and environmental protection for cable fiber and copper and components CM6008A CM6024A e Desk tlat surface mount e 1U 19 rack mountable e Eight fast Ethernet FE ports e 24 FE user ports 1OOBase TX e One fixed EPON uplink port e 2 EPON uplink modules CM8024A CM 7024A e 1U 19 rack mountable e U 19 rack mountable e 24 FE user ports OOOBase IX e 24 FE user ports with PoE e 2 EPON uplink modules e 2 EPON uplink modules Figure 7 Workgroup ONUs provide shared bandwidth to all users or devices within a specified area 11 The CM 6008A flat mount ONU features eight fast Ethernet FE IEEE802 3 10 100Base TX user ports and has a builtin fixed 1 25Gbps uplink EPON port All other workgroup ONUs feature 24 user ports and space for up to two 1 25Gbps uplink EPON modules Both the CM 6024A and CM 7024A support 24 FE ports IEEE802 3 10 100Base TX while the CM
10. 7024A also features Power over Ethernet PoE and is IEEE8O2 3at compliant The CM 8024A supports 24 end user ports of 1O 100 1000Base T Gigabit Ethernet IEEE8O2 3ab In addition to normal workgroup ONUs CommScope offers a unique SFP ONU solution that enables operators to continue using their current Ethernet edge switches when deploying a POL This ONU shown in Figure 8 takes the form of a regular SFP transceiver and can be plugged into any SFP enabled Ethernet switch router or modem The ONU and the Ethernet switch are managed by the OLT just like a regular workgroup ONU and the switch can be contigured in the in band mode This unique solution turther reduces CapEx and provides significant cost advantages over other PON systems Figure 8 SFP ONU lets operators use their current Ethernet edge switches when deploying a POL Optical distribution network ODN Many of the potential benefits of a POL stem from the use of the ODN which uses passive optical splitters to replace the middle layer of active switches in a traditional Ethernet network An ODN is mainly composed of SMF cabling optical splitters fiberoptic connectors and some other fiber optic accessories such as patch panels and face plate The ODN can account for as much as ZO percent of the total cost of the POL network Taking time to carefully design a costettective network that meets the needs of your actual current environment and provides room for growth is critical to
11. 802 3ah 1G EPON compliant e ITU T G 984 2 5G GPON compliant The C9016 has a compact 2RU form factor Its front access design allows rapid installation and reduced maintenance time The C9016 OLT can be used for various PON applications such as FITD FITH FITB and FITC It is designed to accept 1xSCM 2xPSMs 2xPIMs The SCM has builtin 4 x OOOBase X SFP ports and 2x1 OGBase R SFP ports for uplinks The PSMs are hot swappable and support load balancing The PIMs can be either 8x1G EPON ports or 8x2 5G GPON ports depending on the system configuration OLT C9264 The C9264 OLT shown in Figure 4 is another high density high capacity multitunctional PON OLT It can support up to 64 1Gbps EPON or 2 5Gbps GPON ports and up to 4096 ONUs with up to 80Gbps uplink bandwidth The C9264 built on a high capacity Layer 3 switch platform is an efficient and costettective solution optimized for reliable triple play service TPS and beyond The C9264 features fully redundant SCM and PSM for improved availability and reliability Additionally the C9264 offers Layer 2 switching Layer 3 routing QoS OAM and security features as well Total of 64 GPON or EPON ports e Support up to 4096 ONUs e Up to 80Gbps uplink bandwidth Figure 4 CommScope C9264 OLT is a high density high capacity multifunctional PON OLT Features e All front access e 19 inch chassis BRU 12 slots e Future broadband capable platform and multislot chassis e
12. COMMSCGPE Design Guide Passive Optical LAN POL Contents Introduction Passive optical LAN POL Benefits limitations and uses Network planning Optical line terminals OLT OLT C9016 OLT C9264 OLT C9500 Configuring and installing the OLT Optical network units ONUs Desktop ONUs Workgroup ONUs Optical distribution network ODN Fiber cable Optical splitter Fiber connectors Other fiber optic accessories Optical link budget Deployment topologies ODN testing Secure features of PON Network management Command line interface CLI Element management system EMS Simple network management protocol SNMP Bill of material examples Example 1 Campus business building Example 2 Five story hotel Making the right decision References OONA amp O BW O amp Introduction As enterprise networks continue to change and evolve budget pressures are pushing most IT managers to look at new network architectures Many are considering the use of passive optical networks PON within a local area network LAN environment As a pointto multipoint solution PON uses passive optical splitters as opposed to active Ethernet switches to distribute all data voice and video signals throughout the enterprise A single strand of singlemode optical fiber enables network administrators to converge existing networks including voice video data wireless access security surveillance and building automa
13. cifications the actual link distance optical split ratios and link losses from all connections Keep in mind a 3dB loss margin is always a good practice for a long term reliable optical network This buffer of loss margin is designed to tolerate not only the environmental effect and the lifetime effect on the passive optical network but also that of active electronics The OLT ONU transceiver link budget is listed in Table 1 Table 2 lists the attenuation for the most common optical splitters Table 3 provides information on the loss factors for fiber cables and connectors which must be accounted for including upstream and downstream link pass Note that the ONUs also have a maximum receive power If the distribution fiber does not have enough loss i e does not run through a splitter then an inline attenuator may be needed to avoid damaging the optics and ensure the power is within the receiver limits Please refer to CommScope s website for enterprise cable installation guide 2 for detailed part number and specifications DOWNSTREAM 1490nm UPSTREAM 1310nm 20km EPON SFP 28dB 28dB SOK ER ONI RR 31dB 32dB Table 1 This shows the EPON OLT ONU transceiver power budget SPLITTER Se eins fas fe a Table 2 This table shows the attenuation for common optical splitters SMF SMF FUSION SPLICE SC LC APC 1490nm 1310nm CONNECTOR ATTENUATION d Table 3 Here are optical link loss factors for fiber cables an
14. cope com 3 Broadband Applications amp Construction Manual www CommScope com A OLT C9016 Hardware Installation Guide www CommScope com 5 OL C9264 Hardware Installation Guide www CommScope com 6 OLT C9500 Hardware Installation Guide www CommScope com 7 OLIT C9016 User Manual www CommScope com 8 OLT C9264 User Manual www CommScope com 9 OLT C9500 User Manual www CommScope com 23 We re proud to be a part of your network s story Here at CommScope we embrace our role as a trusted resource partner and facilitator We create the infrastructure that connects the world and evolves with every advance in technology By investing all of our capabilities resources relationships and products into your toughest challenges we continue our long history ot solving problems together paving the way for new ideas and tresh ways of thinking We re a trusted resource and partner around the world because we re invested in you your people your networks your success It inspires us to build relationships and intrastructure connect people and technologies across protocols oceans and time zones and share what we learn along the way This is our promise to you This is CommScope COMMSCOPE www commscope com Visit our website or contact your local CommScope representative for more information 2014 CommScope Inc All rights reserved All trademarks identitied by or ar
15. creating a reliable network structure that can satisfy your long term IT and business requirements When designing your ODN some things to keep in mind include e When calculating the link loss budget trom the OLT to the ONU include an additional margin to ensure network reliability e Statistical bandwidth demands for any group on a single PON port above and beyond the link loss budget is the major factor in determining split ratios e To save fiber cables splitters should be placed as close to the user groups as possible e Special security systems or harsh environments may require the use of certain protected features within the ODN e To provide redundancy and support future expansion the ODN should include extra fibers per strand or extra cables e Keep 10G PON in mind when investing the 1G 2 5G PON ODN initially 12 Fiber cable POL uses SMF as opposed to multimode fiber MMF or unshielded twisted pair UTP cables which are used in most current LANs Bend insensitive SMF is not required standard SMF cables will work Please refer to the reference documents CommScope Enterprise Data Center Design Guide and Broadband Applications and Construction Manual tor help in choosing appropriate SMF cables for the installation space Optical splitter Besides the SMF cables another major component of the ODN is the optical splitters These are purely passive devices that divide the 1490Onm optical input signal trom the OLT equally among
16. d connectors 15 Deployment topologies A POL can be deployed using a number of different architectures within the enterprise network Figures 12 13 and 14 illustrate three typical configurations The centralized split architecture Figure 12 employs a single splitter for each OLT PON port Based on the location of the OLT and the end user groups one or more multitiber cables may be used to connect the OLT PON ports to each splitter closest to the end user groups The example shows a single 1 32 ratio splitter where the link loss will be the loss of the 1 32 splitter plus fiber cable and connections Assuming a 500m fiber cable from the OLT to the ONU and six pairs of LC APC connectors in the link then the link loss would be as following Downstream O 1 25dBifiber 1 5dB connectors 1 8dB splitter 3dB margin 22 6dB Upstream O 175dB fiber 1 5dB connectors 1 8dB splitter 3dB margin 22 7dB Figure 12 This illustrates a centralized split architecture with a single splitter for each OLT PON port Figure 13 This shows a distributed split architecture 16 Figure 14 This is an illustration of a distributed tap architecture In a distributed split architecture illustrated in Figure 13 the OLT is located in a data center or other distribution point At the first split the trunk cabling is divided into multiple runs each fo a separate user group Once close to each user group the signal is split again in
17. e registered trademarks or trademarks respectively of CommScope Inc This document is for planning purposes only and is not intended to modify or supplement any specifications or warranties relating to CommScope products or services CommScope is certified according to ISO 9001 TL 9000 and ISO 14001 TP 107657 EN 07 14
18. irelessly or via twisted pair data cable to a variety of Internet protocol IP enabled devices such as computers wireless access points VVAPs and Voice over IP VoIP phones Benefits limitations and uses In designing any LAN solution that delivers the desired technical pertormance as well as the required CapEx and OpEx savings performance and cost savings depend on the specitic environment in which the solution is deployed as well as how it is deployed In the case of a POL the following are some examples of factors that should be considered e Choosing the OLT size how many users need to be supported e Geographic distributions of user groups e Types of network services to be supported such as data video voice surveillance etc e Bandwidth requirement of each user group or individual user e Optical distribution network topology optimization e Shortterm CapEx and longterm OpEx evaluation e Placement of the ONUs at the work station It is also important to understand which benefits such as potential cost savings and simplified deployment stem from the use of passive components versus active Ethernet switching equipment and are therefore unique to POL However other benefits like high bandwidth low electromagnetic interference and green technology are due to POL s use of fiber and can therefore be realized in a fiber based Ethernet setting as well Network planning Detailed planning based on the above facto
19. ity but also supports Turbo EPON mode that allows EPON to run at 2Gbps down 1Gbps up data rates Configuring and installing the OLT The first step to contigure an OLT is to plug in the SCM PSM PIM or other modules into the corresponding labeled slots of the chassis Although all the modules are hot pluggable ESD precautions still need to be taken during the transportation and installation process If the PSM is dc powered a 48Vx20A dc power supply is recommended for each PSM When connecting to the dc power supply make sure the polarity is connected correctly according to the label The two dc power supplies on one OLT chassis are recommended to be plugged into separate UPS power banks for power redundancy to prevent simultaneous emergency power outage When one power supply is down a critical yellow light warning will signal the operator to check the system Customers are recommended to refer to the approved vendor list to purchase the uplink transceivers they need for the LIMs which include 1Gbps SFP 1OGbps SFP or 1OGbps XFP Customers can add PIM cards as their organization grow The PIM cards for C9016 and C9264 are exchangeable All PIM cards will come with corresponding GPON or EPON transceivers The OLT location should have good air ventilation to prevent the system from overheating The surrounding area should have adequate space for efficient fan ventilation The C9016 has air intakes exhaust on the sides
20. order to feed the individual ONUs The cascade of splitters with different ratios provides great network design flexibility and reduces fiber counts in the cables However the link loss calculation has to take the losses of both splitters into consideration Using the above example assuming the total fiber cable length from OLT to ONU is 2km and eight pairs of LC APC connections the link loss is calculated as following Downstream O 5dBifiber 2 OdB connectors 8 OdB 1 4 splitter 1 1 5dB 1 8 splitter 3dB margin 25 OdB Upstream O 7dBifiber 2 OdB connectors 8 OdB 1 4 splitter 1 1 5dB 1 8 splitter 3dB margin 25 2dB A third architecture known as distributed tap Figure 14 uses uneven power splits or optical taps to make the most of the existing fiber capacity For example instead of splitting one fiber into 32 equally loaded fibers it is split into two unequally loaded fibers The distribution fiber retains 80 percent of the optical power while 20 percent is diverted to the drop fiber This network topology allows for high fiber utilization and should be used only when covering long distance The link loss calculation is similar to the above examples except that the fiber cables to each ONU need to be calculated separately 17 ODN testing ODN testing during field installation should be done on both upstream and downstream directions For EPON or GPON laser sources of 1310nm 149Onm and sometimes 1550nm
21. orts voice ports and Wi Fi connections CommScope has a variety of EPON GPON ONuUs from single user desktop ONTs to rack mounted workgroup ONUs that provide high quality low cost solutions All CommScope ONUs comply with IEEE 802 3ah and ITU T G 984 industry standards feature logical link identifiers LLID and provide optical signal strength feedback to OLT for accurate fault diagnostics Customers can select the features according to their specific communication demands Desktop ONUs Desktop ONUs are designed to be located on a desktop tlatmounted on a wall or placed inside an enclosure CommScope manufactures a variety ot desktop ONU models Figure 6 shows some examples for use in GPON and EPON environments CS 9004A GPON CS 6204W EPON CS 8004A EPON Figure 6 These are some examples of CommScope desktop ONUs Features e One to four user ports e Supports Ethernet data VoIP and analog voice video e 802 3ah EPON or G 984 GPON compliant e Four logical link identifiers LLIDs e Link quality feedback ability e Security features e QoS control e Internet group management protocol IGMP snooping The CS 9004A ONU is designed for use in a GPON network It provides four 10 100 1000 Base T subscriber ports and supports the IEEE 802 3ab standard The maximum power consumption is 8VV and it uses a 12Vx1 5A power supply The CS 9014A GPON ONU not pictured is identical to the C 9004A and adds an RF video port
22. plates and short fiber cables During installation of the ODN using professional structured cable i UKJ accessories can help ensure network reliability Please refer to the CommScope website for detailed product information on fiberoptic decessores la b c Fiber patch panel Wall mount fiber Fiber wall outlet face enclosure plate Figure 11 These additional fiber optic accessories may be required when designing an ODN Figure 11 a An example of fiber patch panels used for managing the fiber cables from the OLT to each floor Figure 11 b Fiber enclosures used for pigtail splitters on each floor Figure 11 c Fiber face plates on the wall close to each desk for fiber outlet to connect to each ONU 14 Optical link budget The POL system is adapted from Class B FTTX PON which has a reach of up to 30km For most enterprise applications link spans are typically less than 500 meters This means the transceiver has adequate power to support the required number of ONUs per OLT while maintaining a satety margin Even still users must be diligent in calculating optical link loss and make sure the actual loss measurements agree with the calculations This will ensure the fiber network is installed properly and the actual link loss is within the transceiver performance range for the given environment a key factor to ensure a reliable system Optical link loss should be calculated using the manufacturer s hardware spe
23. r a Service lt gt Provider i gt Networks a Figure 2 POL can converge voice video and data networks onto a single fiber network in a multistory hotel OLTs are typically located at the telecommunication room where the service provider cable from central offices access to Multi SMF riser cables are used to connect the OLT EPON or GPON ports fo each floor and then to the optical splitters Singletiber SMF horizontal cables are installed on each floor to connect the optical splitter ports to each ONU located on or close to users desks The number of optical splitters needed for each floor and the split ratios for each splitter are determined by the number of user groups on each floor and their bandwidth demands and the link loss budget which will be explained later Fiber patch panels can be used close to the OLT and close to the optical splitters on each floor Please refer to the CommScope Enterprise Data Center Design Guide for detailed instructions on how to install riser and horizontal cables Optical line terminals OLT When choosing an OLT the user has two options EPON and GPON The good news is that CommScope s OLT family can be configured to support both Another question is whether to use 1Gbps or 1OGbps The CommScope C9500 EPON OLT can handle 1Gbps and 10Gbps simultaneously providing great network design flexibility The key questions for customers at the network designing stage are e How many use
24. rs Layer 2 switching Layer 3 routing QoS OAM and advanced security features enabling it to adapt to specitic network operation policies and configurations Total of 80 1Gbps or 1OGbps EPON ports e Support up to 5120 ONUs e Up to 160Gbps uplink bandwidth Figure 5 CommScope C9500 OLT is a high density high capacity and highly featured GPON OLT Features e All front access e 19 inch chassis 1ORU 14 slots e Future broadband capable platform and multislot chassis Easy and flexible deployment Nonblocking architecture e 2x SCM e 2x PSM e 2 x LIM supports an eightport 1Gbps card or eightport 1OGbps card e 10x PIM GPON interface module supports an eightport 1Gbps card or eightport 1OGbps card e 1920Gbps switching capacity e Maximum power consumption 1 SOOVW e GPON optics support laser class B C PON ranging typical 20km maximum of 60km IEEE 802 3ah 1G EPON compliant IEEE 802 3av 10G EPON compliant CommScope s POL offers operators a highly efficient poinHo multipoint network solution that combines voice data and video services onto a single passive network Customers can choose our EPON or GPON solutions with various deployment sizes to meet their budget and business demands Our ERPON GPON systems are U S Department of Defense DoD JITC certitied for use in U S military and government applications They are also CableLabs DPoE certified which not only guarantees multivendor interoperabil
25. rs does the network need to support and where are they located e What services does the network need to provide e What are current and future total bandwidth requirements for the groups The OLTs enable customers to save CapEx by deploying the basic structure then upgrading with additional cards or higher bandwidth as needed CommScope provides three OLT options that support up to 5120 ONUs and offers 1GE to 1OGE capabilities OLT C9016 For smaller scale deployments up to 1024 ONUs CommScope recommends the C9016 OLT Figure 3 The 2RU height chassis features two PIM slots and supports up to 1024 ONUs with up to 24G bps of uplink bandwidth It can be configured for use in EPON or GPON networks All modules are hot swappable e Total of 16 1Gbps EPON ports e Support up to 1024 ONUs e Up to 24Gbps uplink bandwidth Figure 3 CommScope recommends the C9016 OLT for smaller scale deployments Features e All front access e 19 inch chassis 2RU three slots e Future broadband capable platform and multislot chassis e Easy and flexible deployment e Nonblocking architecture e 1 x SCM switch and control module with 4x1GE and 2x1O0GE uplink ports e 2 x PSM power supply module ac dc e 2x PIM PON interface module eight ports for either 1G EPON card or 2 5G GPON card e 28Gbps switching capacity e Maximum power consumption 1 60VV e PON optics support laser class B C e Typical PON range of 20km with 60km maximum e IEEE
26. rs is critical for designing a costeffective network that can provide the short and longterm business demand VVhen designed and deployed by experts who understand how to maximize its value a POL has the potential to significantly reduce cost and increase cabling options while satisfying the current and future bandwidth requirements of many enterprise environments Figures 1 and 2 illustrate two examples of how a POL can be deployed in order to leverage its inherent value Figure 1 shows a POL network for a multistory office environment By replacing the middle layer access switches on each floor network administrators can potentially save hundreds of thousands of dollars in CapEx and OpEx Fiber Solitter Distribution Hub Fiber Splitter Distribution Hub Fiber Splitter Distribution Hub OLT Figure 1 Here is illustrated a typical POL installation for a multistory office environment The architecture in Figure 2 capitalizes on POIs ability to converge voice video and data networks onto a single fiber network in a multistory hotel This design helps signiticantly streamline the delivery of triple play services to each room an important differentiator for today s hospitality properties Commscope _ a Fiber Splitter me F hil ami m fanl m lanl Nam alii ilaa al oS er oe CommsScope Fiber Splitter a i a E Li ii i d i paan SS r e E E E ew eras o
27. so this area needs to remain clear The C9264 and the C9500 utilize air intakes on the bottom front and air exhaust out the rear at the top so 1U of space should be reserved above and below the unit for proper airtlow The ground terminal should be connected to ground before power on the system When powering on the system the first time connect a console terminal USB to the com port of the SCM with the provided cable and specify the IP address of the SCM After setting up the IP address the console terminal can then talk to the system through the Ethernet port of the SCM The following list shows a basic OLT configuration customers can start with without redundancy capability e One C9016 C9264 or C9500 chassis e One SCM card e One LIM card and corresponding SFP 1Gbps SFP 1OGbps XFP 1 OGbps line transceivers e One PIM card and corresponding GPON EPON transceivers e The uplink transceivers and the GPON EPON transceivers can be ordered minimum quantity to start with and add gradually as you grow Please refer to the reference documents OLT C9016 Hardware Installation Guide and OLT C9500 Hardware Installation Guide for detailed OLT build up and installation information Optical network units ONUs The ONUs are the access point for end users and are controlled by the OLT ONUs exchange traffic between the OLT with pointto multipoint protocol and decode the intended trattic to each end user via Ethernet ports video p
28. t resides on a server and supports a multiclient architecture The intuitive interface gives system administrators efficient control and management of GPON and EPON POL systems These capabilities include contiguration management for OLTs and ONUs ports VIAN multicast operations and quality of service realtime monitoring and management of performance and alarms traffic statistics and the ability to perform system backups and software upgrades Figure 16 shows an example of the EMS GUI screen shot 5 as ia ai E L miiie ree om ul E i Figure 16 The EMS GUI based network management package supports a multiclient architecture 19 Simple network management protocol SNMP SNMP is a network management tool commonly used for aggregating alarms alerts and status messages into higher order systems such as NetCool SNMP provides a common data set for sharing information with external systems Beyond the basic traps sets and gets system administrators have full control of system parameters For detailed information on configuring and using any of these network management tools users should refer to their system user manual Bill of material examples This section gives two examples of the bill of material BOM of two POL network designs The BOMs detail the active electronic modules passive fiber optic cables and all necessary fiber optic accessories Example 1 Campus business building Table 4 shows an example of
29. tion over a single infrastructure The potential cost savings in terms of cabling installation equipment costs and energy expenses can be signiticant depending on how the architecture is deployed CommScope has developed this design guide to introduce you to our porttolio of passive optical LAN POL solutions and help you in designing a distribution network that meets your needs This guide protiles the available active POL components as well as the passive distribution network and provides helpful information regarding network design and proper installation More detailed and comprehensive information can be found on CommScope s website and through the courses offered at the CommScope Infrastructure Academy Passive optical LAN POL A POL is comprised of two main active powered components an optical line terminal OLT typically located in the data center or equipment room and optical network units ONU s that provide service to the end users A network of singlemode fiber SMF and passive non powered optical splitters connects the OLT to the ONUs The fiber and passive equipment between the OLT and ONUs are often simply referred to as the optical distribution network ODN The OLT provides the interface between the network s core switch and the ONUs The OLT encodes Ethernet data for transmission to the ONUs and manages the upstream data traffic trom the ONUs to the OLT through the ODN The ONUs then distribute the signal w
30. tive effect on both CapEx and OpEx Making the right decision When selected for the right reasons designed in a way that leverages its strengths and installed correctly a POL can add significant benefits to the enterprise network The process however must be carefully considered It should be remembered that because POL is a distribution layer technology it offers a lot of flexibility in how it can be deployed For a multitacility campus for example the core Ethernet network can span from the data center to the individual buildings such as residence halls where optical splitters can replace expensive distribution Ethernet switches POL can then be used to service the specific buildings Deployed in this way POL becomes part of a hybrid distribution layer solution The bottom line is that there are a wide variety of ways to take advantage of POI s unique benefits Without a knowledgeable and above all unbiased technology partner it is easy to end up with a LAN solution that is less cost effective or creates more challenges than expected Involving a partner such as CommScope who has a deep and comprehensive understanding of the various distribution layer technologies trom the beginning can help ensure longterm success Please contact CommScope System Engineering for more information 22 References and Notes 1 CommScope Enterprise Data Center Design Guide www CommScope com 2 Enterprise Design Guide www CommS
Download Pdf Manuals
Related Search