B1 XpressLink (4)
Contents
1. Architecture a Universal slots and board redundancy MIA 16 ports for ADSL or UDSL SU SDSL Board 16 ports for SDSL SU _ VDSL Board 24 ports for VDSL SU nxE1 Board 8 E1 ports for cascadation Network interfaces Supported interfaces STM LOC 3c E3 DS3 E1DS1 MG vas bob ae eee bee ee eee ee ATM Physical interfaceS 1 0 cee es STM 1 OC 3c Optical Single mode optical fiber short haul O 25 km long haul 20 60 km multimode opt possible STM 1 Electrical 155 52 M bit s E3 Electncal AP 34 386 M bit s DS3 Electrical 44 736 Mbit s El Flectrical 2 048 Mbit s DS1 Electrical nG kat aa DA 1544 Mbit s ATM User network interface Standard 0 cc eee eee UNI 3 1 UNI 4 0 QOS aaah yas Naawa CBR UBR VBR nrt VBR rt ATM functionalities PVC VP amp VC crossconnect ATM OAM support TMN interface SNMP management interface via Ethemet 10BT Power supply Indoor Equipment Primary voltage 38 VDC to 75 VDC DC DC on board Overvoltage protection ITU T K20 Outdoor Equipment Primary voltage 115 VAC or 230 VAC 50 Hz or 60 Hz Mechanical Dimension Integration up to 224 links per DSLAM Rack Size mm 2200x600x300 HxWxD Rack according to ETSI ETS 300 119 3 Subrack Size mm 721x450x276 HxWxD2. Subracks according to ETSI ETS 300 119 4 Board Size mm 005 415x235 HxD 19 Environmental Conditions Indoor at C O ETSI ETS 300 019 class 3 1 Operation temperature 5 40 C FIUIMIGICY 444 2ancadevewiny yeas 5 95 R H CE EMC ESD EN 50081 1 EN 50082 2 ETS 300 386 and EN 55022 Class B Product safety DIN EN 60950 Indoor at Non Telco Building ETSI ETS 300 019 class 3 2 Outdoor in roadside cabinets ETSI ETS 300 019 class 4 1 Customer Premises Equipment Interfaces ATM aka Gaan ee ew ew aa ae ATM 25 6 Mbp s Ethemet Ethernet 10 BT IEEE 802 2 IEEE 802 3 Ethernet V2 Seral Interface USB Interface NIC Type Bus PCI Bus Interface POTS ISDN splitter external Modems XpressLink 1100 ADSL ATM POTS XpressLink 1101 ADSL ATM ISDN XpressLink 1010 ADSL Ethernet 10BT POTS XpressLink 1011 ADSL Ethernet 10BT ISDN XpressLink 1110 ADSL Ethernet 10BT ATM POTS XpressLink 1111 ADSL Ethemet 10BT ATM ISDN XpressLink 1090 ADSL Ethernet Router POTS XpressLink 1091 ADSL Ethemet Router ISDN XpressLink 1500 ADSL NIC POTS XpressLink 3500 UDSL NIC POTS XpressLink 1700 ADSL USB POTS XpressLink 3700 UDSL USB POTS XpressLink 9
3. 46020 45020 XpressLink applica tion Descriptor runs on the 45020 runtime server It is connected to the 46020 Network M anager The 46020 abstracts the different tech nologies SNMP Q3 to a conden sed technology independent B RAS Application model The B RAS is an example of how to integrate SNMP based devices into the 46020 via HP OV The 46020 also offers a standard Q3 interface to higher layer ser vice management management systems The architecture of the 46020 45020 is very flexible The hard ware configuration can be expan ded in various stages starting with a single workstation through to a distributed client server architecture so that up to 30 000 subscribers and a corresponding number of XLD network elements can be managed by one element manager Small networks need only one 45020 server that runs on a HP OV server Local Craft Terminal LCT For maintenance tasks there is an LCT available which is connected directly to the network elements or remotely via an IP network The LCT offers a portable solution for customer service personnel It may start configure monitor and diagnose an XpressLink node OA amp M Headquarter XL Application Data Communication Network B IP network DCN Example of NMS architecture for XpressLink B RAS and Siemens ATM backbone 17 Siemens Allround Support System quality and reliability of Siemens products is assured through dev
4. Federal Republic of Germany COPYRIGHTO Siemens AG 2000 e Information and Communication Networks Hofmannstr 51 e D 81359 Munich Germany e This publication is issued to provide information only and is not to form part of any order or contact The products and services described herein are subject to availability and to change without notice
5. fle xibly implement diverse network requirements with a minimum investment of capital The DSLAM provides the following ATM functions e Cross connection Translation of the Virtual Path and Virtual Channel Identifiers VPINCI between the BB signal on the core network side and the xDSL signal on the CPE side Permanent Virtual Connections PVCs are set up according to the cross connections established e VP Multiplexing Multiplexing the individual ATM Splitter p lt __________ Basic subrack _ gt subrack Copper ADSL UDSL SDSL VDSL 10 cells on the xDSL lines into an ATM signal to the ATM SDH core network and demultiplexing them in the opposite direction All the VCs belonging to the path are passed through transparently Signaling is passed through transparently in accordance with the virtual UNI definition e VC Multiplexing Alternatively the XpressLink can also be configured as a VC cross connect This reduces the number of VPs in the direction of the ATM switch Owing to the virtual UNI definition this is only possible for PVCs e Traffic M anagement Services of traffic classes CBR VBR rt VBR nrt and UBR can be transmitted simultaneously UBR services being processed on a lower priority basis The central processor is part of the CU Central Unit The LU pro vides the interface to the core net work via a standard ATM interface The SU_AD16
6. local to the node using its Ethernet interface or remote via an IP network through Web browsing Main Features of the XL system Provision of broadband ADSL G Lite and SDSL based servi ces e g Fast Intemet VoD with simultaneous transparent transport of narrowband tele phone services POTS or ISDN BA Evolution to VDSL on the existing platform using universal slot architecture Highly scalable and cascadable platform with high port density for large scale DSL roll out STM 1 OC 3c E3 DS3 nxE1 DS1 interface to the broadband core network Large variety of CPE options ATMF25 Ethernet 10BaseT and Universal Serial Bus USB PC NIC and Ethemet router Max bit rate of 8 Mbit s downstream and 800 kbit s upstream with ADSL e Max bit rate of L5 Mbit s downstream and 500 kbit s upstream with G Lite e Ma bit rates of 2 3 Mbit s symmetrically with SDSL e Max bit rates of 12 Mbit s downstream and upstream symmetric or 26 Mbit s down Stream and 3 2 Mbit s upstream asymmetric with VDSL e Outdoor solution available e IP access with DSLAM and Broadband Remote Access Router B RAS independently of interfaces to the subscriber e Network management with MainStreetXpress 46020 45020 full ATM PVC end to end man agement system e Web based LCT for field maintenance tasks ADSL Technology XpressLink employs the Asym metric Digital Subscnber Line technology from TI The trans mittable payload
7. mm PE 2 0 km 0 7 km 0 32 mm PE 0 4 mm 3 23 km 0 4 mm PE X 3 23 km Fast Internet Or VOD up to 5 0 km X 2 2 km x 2 5 km PIE PAD KM X 2 7 km Discrete Multitone Modulation The ADSL technology from Siemens TI employs Discrete M ultitone DMT modulation For ADSL signal transmission this technique uses a frequency range above 30 120 kHz POTS ISDN BA up to 1104 MHz The entire frequen Cy range is divided into several Bits channel Frequency ADSL Upstream channel 30 kHz Downstream channel Frequency Assignment of the Frequency Range for ADSL over POTS Signal power Frequency Bits channel Frequency Automatic Bit Rate Adaption to Interference for Copper Pair with Attenuation RF Interference and Cross talk discrete camer frequencies Each camier frequency upstream and downstream is assigned a band width of 4 3125 kHz The usability of the individual resultant frequency channels is determined by line parameters e g attenuation or any interference sources present Interference free channels are assigned with the maximum bit rate If frequency channels are degraded by interfering Signals or raised line attenuation the bit rate is then automatically adjusted If a frequency channel is severely degraded e g due to RF interference the channel is ignored until signal transmission conditions are improved ADSL over POTS versus ADSL over ISDN Fo
8. offers 16 ADSL or G Lite drop interfaces to the sub scribers There is no HW or SW difference between ADSL and BB Core STM 1 0C 3c Network E3 DS3 n x E1 DS1 PSTN G Lite One DSLAM can serve up to 224 ADSL G dmt or G Lite subscribers each line card carries 16 ports There are different line cards for SDSL and VDSL SU SD16 and SU VD24 To ensure optimum usage of the network infrastructure the SU nxE1 DS1 interface enables the operator to cascade several 224 subscriber DSLAMs to one single uplink in the future cascadation will be also Supported with STM 1 E3 interfa ce Two cascadation nxE1 interfa ces are available on one cascadati on interface board In addition the DSLAM has an Ethernet interface for connection of an LCT or the MainStreetXpress 46020 45020 for the operation administration and maintenance of all XpressLink components Remote network elements can be connected to a MainStreetXpress 46020 45020 via inband manage ment Splitter Units POSU combine the XDSL signals and the narrowband Signals for common transmission to the subscriber and split the Signals for transmission to the relevant core network Since the Splitters are purely passive devices the availability of the narrowband services is not affected by any disturbances occuring in the broad band system The splitter boards are located in a separate subrack for high flexibility and packaging density One splitter mo
9. xDSL interfaces An ATM cell bus architecture which provides 1 Gb s capacity for up and downstream traffic avoids any kind of bottlenecks within the ATM path and ensures a future proof DSLAM platform Cascadation of DSLAMs A continuous evolution towards ADSL mass market and high penetration rate of BB services will necessitate a differentiation of ADSL nodes small nodes in remote areas and large nodes in densely populated areas By this time XpressLink will have available boards to cascade small remote DSLAMs towards a single DSLAM in the central location Using nxE1 DS1 interfaces remote locations can be connected very efficiently using already existing SDH transport infrastructure The collecting DSLAM on the higher network level collects the remote DSLAMs via the nxE1 DS1 interface Two nxE1 interfaces will be availa ble on one nxE1 cascading board For large central office applications the DSLAMs can be connected locally to provide a high degree of traffic concentration onto one STM 1 core interface In the future E3 and STM 1 links will be available as a cascadation interface to enlarge the overall system capacity Higher Layer IP solutions One part of the future proof and evolutionary concept is the Broadband Remote Access Server B RAS As an integral part of the complete Siemens product portfo lio for IP over ATM XLD not only offers xDSL solutions but provides the means to build an end to e
10. 025 PC Network Card ATM 25 6M Services at ATM interface PPP over ATM cee eee RFC 2364 M ulti protocol encapsulation over ATM 2 ee RFC 1483 Classical IP overATM ccc ee es RFC 1577 Ethemet over ATM LAN emulation LANE and others Services at Ethernet interface Self leaming bridge Static Routing PPP over PPTP PPP over Ethernet PPPoE 20 Service categories ATM QoS CBR UBR nrt VBR rt VBR Power supply Local external 230V 50 60Hz 1LOV 60HZ Local Integr Power 230V 50 60Hz 110v 60Hz Lightning protection EN 60950 IEC 60950 Protection class Mechanical and Environmental Climate Class ETSI ETS 300 019 1 3 class 3 2 Operation temperature 5 50 C CE EMC ESD ETSI ETS 300 386 1 FTZ 1TR9 11 96 Product safety DIN EN 60950 IEC 60950 Management application MainStreetX press 45020 46020 Management via Ethernet 10BT IEEE 802 3 or inband ATM Management protocol SNMP Hardware platform Sun workstation Software platform SUN Solaris Features Client server scaleable EE E NG DAG Topology and Node Display AA ee Remote software download HUNI O ATM Path M anagement TEEN OA amp M Functions axes te Full integration in Siemens end to end management system Local Craft Terminal LCT Management protocol SNMP Inte
11. 6 M bit s Interface This NT is used to realize ATM end to end or ATTH solutions The Interface to the subscnber terminal equipment conforms to the ATM Forum standard It can be con nected to a PC for data applications or to a Set top box for video appli cations The NT converts the signals bet ween the ATMF 25 6 M bit s inter face and the ADSL interface NT with Ethernet 10BaseT and ATMF 25 6 M bit s Interfaces If customers need to have the fle xibility to use either Ethernet or ATM interface XpressLink offers the so called Twin NT This NT con tains both an ATMF 25 6 M bit s Interface and an Ethemet 10BaseT The two interfaces can be operated at the same time 13 Customer Premises Equipment Family II Network Interface Cards Network Interface Cards NICs can be installed in any Peripheral Component Interconnect PCI bus Slot within a PC PCI bus slots are available on most Pentium based desktop PCs Siemens offers three types the 25 M bit s ATM adapter the ATM ADSL and the ATM G Lite adapter 25 M bit s ATM Adapter This card is a very cost effective ATMF 25 6 M bit s interface ideal for all kinds of ATM and IP based applications Preconfiguration and proven interoperability simplify installation and ensure widespread deployments The adapter card can be operated under Windows 95 98 and Windows NT ATM ADSL and G Lite Adapter The ATM ADSL and the G Lite ATM adapters are an alterna
12. SIEMENS XpressLink System Overview Application Using XpressLink XL in the access area expedites the cost effective introduction and provision of broadband services such as fast Internet high bit rate data trans mission and video on demand VoD for both residential and business customers XpressLink is based on asynchronous transfer mode ATM technology ATM provides multi service signal transmission and flexible future proof access to broadband networks The system s revolutionary concept makes it possible to find economically viable solutions for a wide range of applications Providing broadband services pre viously involved considerable capi tal expenditure as laying new lines on the so called last mile was required Using XpressLink allows you to avoid this cost by utilizing your existing copper cable infra structure At the same time it allows you access to existing nar rowband telephone services POTS and ISDN BA over the same cop per pair The signals for the narrow band services are transparently passed through by XpressLink For this purpose splitters are employed as diplexers on the network and subscriber sides to combine separate the narrowband and broadband signals XpressLink is connected via a standardized STM 1 OC 3c E3 DS3 orn x E1 DS1 interface to an ATM core network or a routerbased core network with ATM interface The interfaces for accessing the exchanges in the Pu
13. a Universal Serial Bus USB port available on most desktop PCs sold from mid 1997 The USB modem can also provide remote network access for a workgroup or a small business by attaching it to a PC based on Windows 95 98 or Windows NT DSL router Some cases of application might require deep routing capabilities concentrated at the customer pre mises side When a business customer wants to connect seve ral subscribers over a router to a WAN network this modem is the right choice The DSL router sup ports the common features like PAP CHAP TCPIIP RIP1 RIP2 etc The external DSL router provides high speed remote network connections for one or more Ethernet attached PCs worksta tions or other networked devices The router sends and receives ATM cells over standard phone lines using DMT digital subscriber line DSL transmission Connection to local computers is provided through a 10BaseT Ethernet port USB Modem or DSL Router Software based installation and configuration USB Because a standard USB port is employed installation of an adap ter card inside the PC is avoided Therefore installation is even easier than for NIC cards Configuration is the same for ADSL and G Lite PC There is no HW difference between a G Lite and an ADSL modem For ADSL a Splitter is required additionally to Separate the broadband signal from the voice signal at the CPE Side Installation and configuration router Settin
14. blic Switched Telephone Network PSTN and digital data networks are retained Subscriber terminal equipment for broadband services PC set top box is either connected externally via ATMF25 Ethernet 10BaseT or 2 USB interfaces or is integrated in a PC via a PC card NIC XpressLink today provides broad band services using Asymmetric Digital Subscriber Line ADSL technology on existing copper cable networks Using the Discrete M ultitone DMT Modulation the maximum data transfer rate is contingent upon line length line quality and potential sources of interference XpressLink automati cally adapts transmission rates to current conditions by detecting and monitoring parameters during ADSL connection set up for indivi dual lines so that uninterrupted maximum bandwidth is always available ADSL allows broadband Signals to be transmitted bidirec tionally at bit rates of up to 8 Mbit s to the subscriber downstream and 800 kbit s towards the net work upstream This is achieved by utilizing a frequency band not used for telephony extending from above 30 120 kHz for POTS ISDN BA up to 11 MHz A variant of ADSL is G Lite also known as UDSL G Lite provides maximum bit rates of 15 Mbit s and 500 kbit s for downstream and upstream respectively G Lite Intends to make installation at the customer side easier by avoiding the installation of a splitter Specialised business applications like video confer
15. cessary electronic voltages are generated with on board DC DC converters This allows a flexible and modular design The DC input voltage is nominal 48 V 60V onboard DC converters input voltages ran ging from 38V to 75V The racks can also be equipped with rear panels and doors to pre vent unauthorized access All extemal electrical DSLAM interfa ces are accessible from the front via the connector panel For FTTC applications the racks are installed in weatherproof enclosures These are fed from the public power supply network and are equipped with backup batte ries 11 Customer Premises Equipment CPE Family I e NetworkTermination and Splitter To economically and flexibly pro vide high bandwidths on demand Network Terminations NTs offer standardized interfaces that expe dite the connection of terminal equipment PC or STB These cover the entire range of residential and business customer applications SOHO SME The NTs are fed via an integrated AC adapter plug from the public power supply network 110V or 230V PC and or STB TV POTS or ISDN BA Tti i in ee a 12 The NT is housed in a compact plastic case for convenient wall mounting or desktop use It is to be installed directly on residential or business customer premises There are different variants with ATMF 25 6 Mbit s interfaces and or Ethernet 10BaseT interface In the direction of the DSLAM an ADSL inte
16. core networks post a AGO jae NEN ott Yen CBR UBR VBR e Quality of Service QoS XpressLink is based on SY ATM transmission over ADSL permitting Permanent Virtual Connections PVC and being transparent for Switched Virtual pc Connections SVC cape Nin NG D S f ng 22 wo KI A nene 100 End to end Network Configuration for IP over ATM over ADSL In its efforts to provide a customi zable broadband access platform Siemens has developed a software solution called the Service Se lection Server SSS Using this solution the Intemet user reaches a remote access server for exam ple via dialing in The personalized service selection page Portal is downloaded from the SSS to the user s standard Web browser By clicking on the respective icon in the portal page the user selects ISPs and or service content provid ers Accounting is then started for the service selected enabling the IP access carrier to collect units of usage for later billing purposes Billing is possible on a perservice perusage time volume perdata basis PPP over Ethernet Regarding the XpressLink Ethemet NT bridging is supported by being transparent to the PPPoE protocol Support of RFC1483 allows the assignment of an IP address to the user PC through DHCP In this scenario the DHCP server can be the B RAS or a separate server e g located at the ISP The graphic on the right is a
17. d in electronic form The files can then be down loaded e g to the workstations of the operations systems thus providing Significant benefits in soeed and ease of handling Training For the personnel of the operating company the Siemens Training Center for Communication Systems provides training programs compn sing various courses oriented to target groups i e tailored to the different activities of the various personnel The course require ments contents and objectives are precisely laid down for each of the target groups The training is given e n the Classroom e At work e Computerbased Courses can be adapted to suit the specific requirements of the operating company on an individual basis Technical Service Center The Technical Services are service centers located in the operator s organization in the regional agen cies and at the Service depart ment for Communication Net works in Munich Their main task is to provide technical support to ensure continuous system and service availability including e Emergency Service e On Call Support e Fault Report Processing e Software Hardware Update e Field Service e Repair and Replacement Service e Bulletin Board e Basic Software Upgrade For more information about Siemens professional services see brochure Customer Success Order No A50001 N12 P5 2 7600 Technical Specifications ADSL specifications Modulation aala aa DMT Sta
18. data rate with ADSL is dependent on line length Measurements on XpressLink see also graphic on right confirm excellent performance in terms of both maximum bit rate and reach e Bit rates of up to 8 Mbit s towards the subscriber down stream and up to 800 kbit s towards the network upstream e Range 5 5 km at 1 Mbit s downstream and 64 kbit s upstream e High performance margins guarantee high transmission reliability and the availability of the required bandwidth Interoperability Siemens and TI are members in the ADSL Forum and UAWG stan dardization group Siemens has proved via extensive interoperability testing that its xDSL access plat form XpressLink is compatible to xDSL systems of the other major xDSL system suppliers Besides testing under the co ordination of the ADSL Forum and UAWG Siemens has successfully proved interoperability in their ADSL com petence center Interoperability refers to the ADSL ATM and application layer between DSLAM and CPE Interoperability of xDSL equipment means flexibility for operators and customers It is a condition for xDSL mass market deployment up to 2 5 km Superfast Intemet Broadcast TV upto 3 0km up to 4 0 km Data Rates with ADSL as a Function of Line Length Data Rate kbit s Loop 1 Loop 2 Loop 3 Loop 4 Loop 5 0 8 km 14 km 0 32 mm PE 0 4 mm PE 0 7 km 18 km 0 32 mm PE 0 4 mm PE LO km 15 km 0 32 mm PE 0 4
19. date the traffic of several DSLAMs on one core interface oo e cot B ot amp IN oc E3 ex NG WE oe Network Operation and Management The management system of XpressLink is the M ainStreetXpress 46020 45020 It is the management solution not only for XpressLink but also for the Siemens New bridge ATM product family M ainStreetXpress Other SNMP based devices like the B RAS can be integrated in the NMS in conjunction with HP OV As a consequence the 46020 45020 ensures real ATM end to end network management for integrated Network Elements from the XpressLink access to the ATM backbone M ainStreetXpress product family One NMS for the whole ATM environment means that the costs for installation training and maintenance of the NMS are minimised The XpressLink nodes are confi gured and administrated on a gra phical basis using form windows logical navigation trees asynchro nous notification mechanisms and object listing applications Management includes configura tion alarms diagnostics and per formance The XpressLink DSLAM XLD and Network Termination Software can be downloaded and upgraded centrally through the 46020 45020 The 46020 45020 is a field proven and scalable system XpressLink offers a Web based local Craft Terminal LCT for field maintenance tasks and small trials comprising a laptop with Windows NT and MS Internet Explorer soft ware Connection to an XpressLink node can be
20. dule serves 16 POTS or ISDN lines The splitter subrack can be co located in the DSLAM rack or remotely in sepa rate racks Each DSLAM system consists of 2 subracks e Basic subrack for CU LU and SU_ADSL SU VDSL SU SDSL and SU nxEL e Subracks for the passive splitter units The concept of seperate basic subracks and splitter subracks allows cost optimized single rack architectures to be extended to accommodate more subscribers at any time through cascadation From the XpressLink NMS point of view each basic rack cascaded or not is one single network element Only the slot adress of the CU und LU units are fixed Due to the uni versal slot concept it is possible to use any other slot of the basic subrack for the operation of either ADSL G Lite SDSL orVDSL appli cations in the DSLAM or to install an SU_nxEl The lower part of the basic subrack supports all the boards and the upper part contains the wire interfaces and the external powering voltage Each rack contains a terminal panel with fuse panel and an optional clock distributor supplying an external clock signal T3 From 1 to 2 cascaded DSLAM To ATM backbone or cascading DSLAM KIA AA Configuration of the basic subrack for All ADSL and SU nxE 1 for cascadation 0123456 7890123 Splitter Subrack with 224 16 x 14 splitters Basic subrack with ADSL line cards The DSLAM design has a decen tralized power supply all ne
21. echnology is to simplify installation at the subscri ber premises on the basis of the existing cabling at the location It is not possible however to combine G Lite with ISDN Moreover it pro vides significantly lower bit rates Splitter NT Optimized network architecture with 3 level DSLAM cascadation than ADSL Since the basic tech nologies for ADSL and G Lite are very similar XpressLink uses the Same HW technology for ASDL and G Lite and integrates both DSL solutions in one SW XpressLink provides SDSL and VDSL as an evolutionary path from ADSL architecture It can thus pro vide subscribers with symmetric and asymmetric high bandwidth services With symmetric 2 3 Mbit s SDSL supports business applica tions which require symmetric transmission rates on a similar level to 2 Mbit s leased lines SDSL provides transmission for a length of up to 3 5 km VDSL facilitates enhanced video applications and high bit rate data services Symmetric bit rates of up to 12 Mbit s up to 500 m and asymmetric bit rates of up to 26 3 2 Mbit s up to L5 km are possible Because VDSL has a Shorter range the DSLAMs are typically located closer to the subscriber within an FTTC FTTB architecture Universal Slot Concept Thanks to its evaluative design based on the xDSL universal slot concept the XpressLink platform can be easily reconfigured or upgraded with new features and additional
22. elopment and produc tion processes ISO 9001 certified and supported by global service logistics Planning Project Management Siemens project engineers estab lish project plans work out the details of the project to be imple mented in consultation with the operating company and produce a project implementation schedule This includes all the activities in volved ranging from ordering hard ware and providing software as well as organizing delivery installa tion and commissioning through to providing the database and the documentation In addition Siemens provides support for construction planning network planning and in creating operator concepts Installation Separate documentation is provi ded for installation Installation Manual IM N describing step by step the process of installing the system components After a suitable training period and a limited period of transitional sup port local personnel are able to take over the work of installation themselves Commissioning The contracted telecommunicati ons equipment is commissioned according to the manuals and pre pared for acceptance Commissi oning includes for example loading the application program installing the database and performing off line functionality tests At the end of Commissioning the system is ready for Acceptance Commissi oning includes basic network inte gration complete network integra tion is available separately
23. encing LAN LAN connections may require a sym metric transmission capacity SDSL can be the solution for these applications with a transmission rate of 2 3 Mbit s in both upstream and downstream direction The available bit rate can be further increased by employing Very high bit rate Digital Subscriber Line VDSL technology VDSL achieves bit rates of up to 12 Mbit s down stream and upstream for symme tric services and up to 26 Mbit s downstream and 3 2 Mbit s upstream for asymmetric services VDSL is still under standardization in ETSI and will be available in the near future ADSL solutions are ideally suited to provide broadband services both to residential customers and small and medium size businesses SDSL and VDSL solutions can be used in addition to better address the market for business customers where enhanced broadband services are required The distances that can be spanned with ADSL UDSL SDSL and VDSL are about 5 km 3 5 km and 15 km respectively With Fiber to the Curb FTTC solutions providing optical fibers nearer to the subscriber the distance between the local exchange and the subscriber is vir tually unlimited For FTTC the XpressLink DSLAM has to be deployed nearer to the customer buildings e g separate from the Central Office CO building For this outdoor version a shelter is available As subscriber density increases in the future it is possible to casca date DSLAM s to consoli
24. g Protocol Local Area Network Local Craft Terminal Leased Line Line Termination ADSL Line Unit Narrowband Network Element Network Interface Card Network Management System Network Termination Optical Fibre Operations System PBX PDH POP POTS PPP PSTN PVC QAM SDSL SME SNMP SOHO 555 STB STM SU_AD 16 SU_VD 24 SU SD 32 SVC SW UADSL UDSL TI TMN UAWG UBR UDSL UNI UPL VBR rt VBR_nrt VDSL VoD WAN Private Branch Exchange Plesiochronous Digital Hierarchy Point of Presence Plain Old Telephony Service Point to Point Protocol Public Switched Telephone Network Permanent Virtual Connection Quadrature Amplitude M odulation SDH Synchronous Digital Hierarchy Symmetrical Digital Subscriber Line Small M edium Enterprises Simple Network M anagement Protocol Small Office Home Office Service Selection Server Set Top Box Synchronous Transfer M ode Subscriber Unit ADSL 16 Ports Subscriber Unit VDSL 24 Ports Subscriber Unit SDSL 32 Ports Switched Virtual Connection Software Universal ADSL Universal Digital Subscriber Line Texas Instruments Telecommunication M anagement Network UADSL Working Group Unspecified Bit Rate Universal Digital Subscriber Line User Network Interface User Panel Variable Bitrate realtime Variable Bitrate non realtime Very high bitrate Digital Subscriber ine Video on Demand Wide Area Network 21 Order No A50010 D3 A10 4 7629 e PAO200L0 e Printed in the
25. g up the router is no pro blem Advanced routing features like Network Address Port Translation and complete DHCP and DNS functions enable all LAN workstations to access the Internet without requiring reconfi guration The ADSL router has a senal RS 232 port for local management The router is managed through an intuitive Web based graphical user interface Future proof CPE concept Siemens XpressLink comprises a complete suite of modems as customer premises equipment For future applications Siemens will offer further types of modems As voice and data services grow together more and more a modem will be available concen trating up to 16 voice ports and one Ethemet interface on one ATM overADSL line towards the DSLAM On the CO side a voice gateway transforms the voice over ATM signal into the appropriate narrowband signal to transmit it to the voice switch For users who do not want to install new home wiring when on the high speed data highway an NT with wireless access will be the answer in the future 15 Network Operation and M anagement The XpressLink system is seamlessly integrated in the MainStreetXpress Network Management suite based on the 46020 Network M anager and 45020 Element M anager With one single platform the whole communication chain from ADSL access to the ATM core can be managed This is the most cost basc Shelf effective and powerful solution for Broadband TMN E EA BE Ai Hika Hy
26. in the service Network Integration 18 Acceptance If required acceptance of the system can be camied out with the operating company on a ready for acceptance RFA basis before the system enters service This usually comprises a visual inspection of all the equipment as well as a demonstration of the hardware and software functions The scope of the acceptance testing is agreed contractually with the operating company on an individual basis Network Integration This involves linking the system into an existing network as well as loading the database The final tests are then performed to verify intemetwork functionality Documentation The operator documentation for WN products is classified accor ding to tasks and target groups All documents covering the descripti on User Manual UMN Technical Description TED Subsystem Des cription SSD installation Instal lation M anual IMN and mainten ance of the system Maintenance Manual M M N are structured from the top down Introductions to the system and network begin by describing the top level then pro gressively deepen the reader s knowledge down to the functional levels Sub dividing the operator documentation in this way optimi zes system operation and facili tates fault elimination At the same time the documentation can be broken down into handy sized manuals for each task Apart from the standard hard copy the documentation can also be Supplie
27. itters is to separate or combine narrowband signals and broadband signals End to End Solutions XpressLink is used to provide end to end network solutions for new broadband services The key to successful deployment of xDSL is end to end compatibility of all communication layers i e both for the existing infrastructure Frame Relay based Internet Internet Service Provider POPs etc and for new broadband systems from different vendors The system architecture for our end to end solutions is based on existing standards in particular the Point to Point Protocol PPP over ATM and the PPP over Ethemet PPPoE This ensures that the system can be implemented rapidly and provides the following impor tant service requirements e Access to Internet corporate networks local content servers and peer to peer communication e Simple migration of existing ISP infrastructures to IP over ATM based end to end networks e Integration of new broadband services on existing IP service platforms e Flexible transport platform based on ATM e Supports multicast service e Supports various treffic classes The End to End Solution with XpressLink for IP over ATM The XpressLink access network solution is fully integrated in the superordinate IP over ATM network architecture The superordinate network architecture also includes the Siemens New bridge product family MainStreetXpress M SX in the core network area This inte gratio
28. n allows diverse services to be provided e g switched virtual connections to Intemet ISP and the creation of Virtual Private Networks VPN with various QoS options XpressLink can be connected to the ATM core network via the ATM Access Switch The Access Switch also allows flexible traffic concen tration and routing e g according to subscriber type residential business customer and the service required by the subscriber A busi ness customer accessing VPN applications can be connected throughout the network The result IS a peerto peer connection with guaranteed QoS core An end to end IP session Is realized with the Point to Point Protocol A Broadband Remote Access Server B RAS is employed in Siemens network architecture exactly for this purpose The B RAS can be connected both to the ATM concentrator and to the switch in the core network Among other functions the B RAS provides subscribers with access to Internet Service Providers ISPs or to corporate LANs These connections are set up using the PPP dynamic address assignment or permanent IP address assign ment functionality The B RAS pro vides the PPP functionality e g authentication and supervision of the PPP session The graphic below represents this network configuration Other configurations are alSo pos sible For example the B RAS can be connected to the switch in the ATM core network or be interpo sed between the DSLAM and ATM
29. n example of a PPP over Ethemet network archi tecture PPP over ATM Through this method the PPP ses sion is terminated in the BB RAS IP packets are extracted from the PPP and forwarded via an IP based broadband core network FR ATM to the addressed ISP or corporate LAN The graphic below is an over view of the network architecture and the data processing at protocol level PPP over ATM is asolution mainly for residential subscribers It is applicable for any ATM based NTs USB modems and NICs PSTN Local Exchange et STM 1 E3 se ATM Server Frame Relay PERET SPs AALS ATM ATM ATM FR FR FR Network Topology for PPP over ATM dial in to B RAS PSTN Local e g T Online Exchange or AOL ISP STM 1 E3 Radius ADSL ATM Server j UDSL DSLAM VDSL SDSL Es ISP Radius Internet Server Network Topology for PPP over Ethernet dial in to B RAS Digital Subscriber Line Access M Ultiplexer DSLAM The DSLAM terminates the sub scriber loop network Its Line Unit provides the option of an optical or electrical interface STM 1 OC3 155 M bit s an electrical E3 DS3 34 Mbit s 44 Mbit s interface ora nxE1 DS1 IMA n x2 Mbit s nx 15 Mbit s n 51 8 interface to the BB core network A connec tion to an ATM Access Switch is also possible Because the DSLAM can be equipped with different units on a modular basis it is possible to
30. nd broadband network with all the Capabilities to support IP based services with the multi service class and Quality of Service fea tures inherent to an ATM transport platform In addition using the higher layer access and subscriber manage ment of a Service Selection Server SSS the carrier is able to offer wholesale access products and services providing a single and personalized page a so called por tal page The service selection is a subscniberinitiated operation and is fully automated for the carmier Customer Premises Side Residential and Business On the customer premises side a complete family of DSL modems is available The least costly modems are the PCI NIC cards which are installed directly in a PC and the USB modems that are linked to the PC by a standard USB interface XpressLink supplies an ADSL router for business users who need a modem with exten ded routing capabilities e g fora LAN WAN connection The modem family is completed by the Network Termination NT with Ethemet 10BaseT or and ATM 25 interface The NT is managed and controlled centrally by the xDSL operator through the XpressLink management system 46020 45020 thus providing the capability to fully control the whole ADSL network The narrowband signals for POTS and ISDN BA are passed through by XpressLink transparently Splitters are employed for this purpose at the subscriber and on the network side The function of these spl
31. ndard ANSIT1413 Issue 2 Cat 1 Frequency Division M ultiplex for POTS Cat 2 Frequency Overlap for ISDN Echo cancellation for POTS and ISDN ETSI ETR 328 and ITU G 992 1 Min Downstr bitrate 32 kbit s Min Upstr birate 0 0 eee 32 kbit s Downstream bitrate up to 8 16 Mbit s Upstream bitrate up to 800 kbit s Rate adaption 32 kbit s step Max Distance eee about 5 Km Passive Splitter Line functions ISDN 2B1Q and 4B3T POTS 2wire a b Metering tone 12 16 kHz and different line impedances real or complex UDSL specifications Modulation 2 0000 eee eee ee ee es DMT Standard Implemented according to ITU T G 992 2 and G lite standard of UAWG Min Downstr bitrate 32 kbit s Min Upstr birate 0 0 0 eee 32 kbit s Downstream bitrate up to 1536 Mbit s Upstream bitrate up to 512 kbit s Rate adaption 32 kbit s step Max Distance aaa about 5 Km Other xDSL interfaces SDSL Transmission rate for SDSL Symmetric 2 1 a up to 2 3 Mbit s Max Distance n about 3 5 Km VDSL Max Data rate for VDSL Asymmetric up to 26 Mbit s Downstream up to 3 2 Mbit s Upstream SVEMIMEUIC 4 24 ANA BA Peo anO 2 12 Mbit s Max Distance 15 Km 500 m DSLAM Features
32. r POTS service FDM with sepa rate bands for up and downstream traffic is deployed to obtain maximum interoperability with other CPE vendors worldwide Echo cancellation improves the ADSL performance As ISDN service needs more bandwidth than POTS 120 kHz versus 3 4 kHz the available band width for ADSL transmission is less than for POTS The integrated asymmetric echo canceller allows the upstream and downstream channels to overlap The advantage is that the low frequency range which is particularly suitable for Signal transmission is available for both the downstream and upstream direction This allows ADSL over ISDN to have a similar performance than ADSL over POTS Main ADSL Features Conforms to ANSI Standard T1413 Issue 2 and ITU G Dmt G 992 1 DM T based FDM for ADSL with POTS and frequency overlap for ADSL with ISDN Echo cancellation for ISDN and POTS Reed Solomon forward error correction Wei 4D Trellis coding M ultiport architecture Automatic bit rate adaptation Bit rates of 8 Mbit s downstream and 800 kbit s upstream over a distance of 2 5 km TI software System Architecture The standardized interfaces and modular design of XpressLink make it ideally suited for cost effective expansion of existing narrow band networks because it allows shared use of the established infrastructure to provide broadband services via XDSL This applies to the copper cables in the subscriber loop through
33. rface SNMP management interface via Ethemet 10BT IEEE 802 3 Hardware platform Pentium PC or Laptop Software platform Windows NT 4 0 5 0 Further Information XpressLink A50001 N8 P60 7600 MSXpress 45020 NER 97 2388 A 7629 MSXpress 46020 NER 97 2348 G 7629 InterXpress SSS A50001 N8 P61 7600 InterXpress IAD 4700 A30808 X3641 A1 7629 MSXpress 36140 NER 97 2637 A 4 7629 MSXpress 36170 NER 97 2345 E 7629 MSXpress 36190 NER 97 2346 D 7629 Abbreviations ADSL AN ANSI API ATM ATTH B RAS BB CAP CBR DMT DSLAM EMC ETSI FDM FTTB C IP ISDN BA ISP ITU T L2F L2TP LCT LL LTAD LU NB NE NIC NMS NT OF OS Asymmetric Digital Subscriber Line Access Network American National Standardization Institute Application Programming Interface Asynchronous Transfer Mode ATM to the Home Broadband Remote Access Server Broadband Camierless Amplitude and Phase Modulation Constant Bit Rate Discrete M ultitone Digital Subscriber Line Access M ultiplexer Electromagnetic Compatibility European Telecommunications Standards Institute Frequency Division M ultiplex Fiber to the Building Curb Internet Protocol ISDN Basic Access Internet Service Provider Telecommunication Standardization Sector of International Telecommunication Union Layer 2 Forwarding Layer 2 Tunnelin
34. rface is implemented The difference between a NT and other CPE s USB PC NIC etc Is that the NTs are capable of being completely managed by the Management System 46020 45020 Management includes SW down load and upgrade configuration management self test monitoring fault and performance management Communication to the Management System is carried by an inband ATM management channel default PVC A separate splitter preceding the NT allows broadband and narrow band services POTS or ISDN BA to be used simultaneously The two types of services are transmitted between the NT and DSLAM viaa common line Phone NT with Ethernet 10BaseT For those service users who are still operating subscriber terminals with Ethemet interfaces this NT is the nght choice The interface con forms with the Ethernet Standard The interface to the DSLAM is an ADSL interface The Ethernet NT Supports three different modes self learning bridge static router or PPP forwarding through PPTP tunnel Splitters Splitter Units are installed at the customer s premises if both broad band and narrowband services POTS or ISDN BA are required The splitter is a purely passive de vice that separates and combines narrowband and broadband signals The splitter can be used to connect terminal equipment for POTS or ISDN BA It is housed in its own compact plastic case for either wall mounting or desktop use NT with ATMF 25
35. rk i m NG Geers Link 02 15AT AA Far 0 Parenter Ha bE ol ie AS ple Hap VX F Be i Apna himi ar bir bir Pores bra Pair Hn bim fips imu Fore jiii gt ar biar Narin ag h Biar 0E niay prima nae pi a eas jen reg a Me Leiber Hie pi heer Hor Las ee ei kata krm EPE Bar Wree iadd Bair iran LA ilangan arse ERRA LEITETE LER TE Lar aa Lng Abe ira iS oe Ermiri Screenshots of the XpressLink Management System 46020 45020 16 ELELE Ka EN ee eh Dd i EF SPE AA NG Features Graphical network display down to the board level Comprehensive configuration Management ATM end to end path management Detailed fault management Loopback tests for fault location Sophisticated performance management on physical and ATM layer Software management inclu ding centralized software upda te backup and restore functions Inband connection of the Element Manager to the Xpress Link system Local connection via Ethemet out band also possible Q3 interface for access to a higher layer service manage ment system Local Craft Terminal LCT availa ble running under Windows NT with a Web browser NMS end to end solution The figure shows an example of the Siemens NMS architecture The XpressLink system the B RAS the 36140 and the ATM backbone switches 36170 and 36190 form an ATM network This variety of nodes can be managed through one single management system the M ainStreetXpress
36. tive to using Network Terminations for standalone PC applications In this case the DSL subscriber line is connected directly to the PC All the ATM and DSL functions are provided by the adapter and by dri ver software installed on the PC The main features of this card are e Network access via ATM over ADSL or G Lite e industry standard DMT ADSL at up to 8 Mbit s or G Lite at up to L5 Mbit s downstream e Seamless operation under Windows 95 98 and Windows NT 14 Installation and Configuration The hardware is quick and easy to install without having to set jum pers or DIP switches Installation of the software is just as simple Easy and errorfree installati on minimizes requests to the network operator for Support The ADSL and G Lite adap ter will be delivered to the custo mer with a driver SW The SW con tains all the necessary preconfigu rations As a result the DSL sub scriber has the advantage of a Simple plug and play solution Network Interface Card NIC O line ADSL SDSL VDSL 3 Vo 25 M bit s ATM Adapter PC Configuration with 25 M bit s ATM Adapter Subscriber line ADSL UDSL ATM ADSL Adapter PC Configuration with ATM ADSL Adapter or ATM UDSL Adapter USB modems e DSL router USB modems Similarly to the PC integrated ADSL and G Lite adapters the USB modems provide low cost solutions for ADSL and G Lite deployment Connection to the PC is provided through
37. to the existing PDH SDH transport systems for accessing the core network The system components of XpressLink comprise the customer premises equipment CPE and the DSLAM To fit flexibly into existing networks and to be able to adapt to future requirements and changes the system architecture of XpressLink pursues and unifies several key points e A set of different Feeder Interfaces for an optimised use of network capacity e Evolutionary xDSL technology which offers a complete range of symmetrical and non symmetrical DSL services e A universal slot concept which provides maximum flexibilty for the configuration of the XpressLink DSLAM e Cascadability of XpressLink DSLAM s for cost effective usage of network infrastructure e Complementary technology B RAS and SSS to offer IP functionality and services The XpressLink DSLAM operates as a multiplexer which consoli dates the traffic originating from a number of subscniber lines to a single feeder interface towards the ATM network The feeder interfaces employ established transmission technolo gies PDH SDH with bit rates starting at nxE1 nxDS1 n 1 8 E3 DS3 and up to STM 1 or OC 3c ki MainStreetXpress 46020 45020 T p AH ATM B RAS 5 ATM K Access Z 7 L DS ADSL of gt DSLAM Ae OF G lite yes An SDH E1 nxE1 DSLAM Evolutionary xDSL Technology G Lite is a variant of ADSL The purpose of this t
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