Abstract:
A preferred embodiment comprises a system and method for creating and using a regional Internet-service network installed atop an existing wire radio-transmission network. The preferred embodiment is able to provide broadband access to integrated telecommunication services for a high number of users simultaneously at a high data rate. Such an Internetwork solution ensures quality service for a wide-range of Internet/intranet applications. Such applications include traditional data transfer; real-time control; multimedia and interactive collaboration supported by efficient management of bandwidth and buffering resources; multiple service classes (i.e., persons receiving access to the network at varying speeds and bandwidths); admission control; flexible resource allocation; and explicit price-performance control. A preferred system comprises an overall network structure with individual users and LANs, interconnected by local and regional backbones into a substantive network that utilizes IP protocols accessed to the Internet.

Description:
FIELD OF THE INVENTION  
         [0001]    The subject invention is directed to the provision of Internet services, and particularly to provision of Internet services over a radio-transmission grid.  
         BACKGROUND  
         [0002]    Most Russian cities share a wire radio-transmission grid that was installed in the 1930s to broadcast radio programs, and as a means of allowing the government to communicate on a secure basis with its citizens in case of emergency and war. This radio-transmission grid has been expanded and upgraded since its initial installation.  
           [0003]    The radio-transmission grid in Russian cities includes an infrastructure of telecommunication lines that are connected to each building in the city, both residential and commercial. Within each such building, pairs of twisted copper wires connect the telecommunication lines to each individual sub-unit (apartment, office, etc.) within the building. Each sub-unit is outfitted with one or more jack/outlets, which are used to connect to a radio-receiver. For example, there are more than of 3.1 million radio-jacks in residential and commercial units in St. Petersburg and the surrounding suburbs. Over 5,000 kilometers of telecommunication lines have been laid throughout this area to support the radio-transmission grid.  
           [0004]    The radio-transmission grid has been upgraded repeatedly to incorporate the latest available technology. Existing hardware in use by the St. Petersburg grid permits three-program radio-transmission. The grid employs advanced, highly efficient amplification equipment to provide, among other services, voice transmission with limited distortion. To date, this radio-transmission network structure has only been used for radio. No one has used such a network to provide Internet-related services.  
           [0005]    Currently-known Internet transmission networks have deficiencies that include the following. Internet access networks based on dial-up technology (public telephone lines) are unable to (i) connect all of their customers/subscribers to Internet services simultaneously; (ii) efficiently use bandwidth resources; or (iii) provide a justified data rate for different levels of clients and services.  
           [0006]    Internet access networks employing allocated communication channels impose additional operating costs that result in increased Internet subscription prices, since an independent access channel must be provided to each potential user.  
           [0007]    Internet-access networks using ADSL modems limit the network system by imposing a limitation on the maximum available data rate, which typically cannot exceed 8 Mbps. These networks also require additional equipment to be installed at the telephone switching stations and at each customer&#39;s site, dramatically increasing the cost of service.  
           [0008]    Use of Power Line Telecommunication (PLT) technology as an Internet access solution is limited to “narrowband” applications such as telemetry. This technology is primarily useful only for reducing operational costs of the power-supply utilities, and suffers from a lack of standards and inter-operability.  
           [0009]    Wireless network technologies have limited bandwidth (up to 50 Mbps), undeveloped telecommunication standards and infrastructure, and also are expensive compared to other Internet access technology.  
         SUMMARY  
         [0010]    In general, the invention includes a system and method for permitting existing radio-transmission lines to be used for Internet access and related information technology (IT) services, without interfering with the radio-transmission network&#39;s primary purpose—radio program broadcasting and special announcements by a government to its citizens in case of emergency.  
           [0011]    A preferred embodiment allows the radio-transmission network to be split to permit uses of the same telecommunication lines for IT applications. These uses include the delivery of (i) standard (modem-based) Internet access, (ii) high-speed Internet access, (iii) Internet telephony, (iv) real-time, non-compressed, audio, and video transmission, and (v) high speed data transmission.  
           [0012]    A preferred embodiment includes a regional Internet-service network installed atop an existing wire radio-transmission network. The preferred embodiment is able to provide broadband access to integrated telecommunication services for a high number of users simultaneously at a high data rate. Such an Internetwork solution ensures quality service for a wide-range of Internet/intranet applications. Such applications include traditional data transfer; real-time control; multimedia and interactive collaboration supported by efficient management of bandwidth and buffering resources; multiple service classes (i.e., persons receiving access to the network at varying speeds and bandwidths); admission control; flexible resource allocation; and explicit price-performance control. Physically, a preferred system comprises an overall network structure with individual users and LANs, interconnected by local and regional backbones into a substantive network that utilizes IP protocols accessed to the global information superhighway. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0013]    [0013]FIG. 1 is a block diagram of the basic components of a radio-transmission network.  
         [0014]    [0014]FIG. 2 is a block diagram of the components of a network that is an embodiment of the subject invention.  
         [0015]    [0015]FIG. 3 is a block diagram of the basic components of the network, showing in greater detail the connectivity between components.  
         [0016]    [0016]FIGS. 4, 4A, and  4 B are more detailed block diagrams of certain components used to form the network of the subject invention.  
         [0017]    [0017]FIGS. 5, 6, and  7  are flow charts that illustrate in general the operation of the network of the subject invention.  
         [0018]    [0018]FIG. 8 illustrates variations in network topology of the subject invention.  
         [0019]    [0019]FIG. 9 depicts components of an inter-building transformer station. 
     
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS  
       [0020]    A first preferred embodiment of the subject invention includes a system and method for providing Internet service over an existing radio-transmission network.  
         [0021]    [0021]FIG. 1 depicts a conventional radio-transmission network. The network includes a studio  100  which is the source of all radio program transmissions. The studio is connected to an audio distribution center (ADC)  110  by a pair of copper wires  105 . The ADC is similarly connected to a plurality of base amplifier stations (BAS)  120 . Each base amplifier station  120  is connected to an ADC  110  by its own pair of copper wires  115 .  
         [0022]    The ADC  110  includes a plurality of amplifiers for receiving radio signals from the studio (via copper wires  105 ) and transmitting the amplified signals to base amplifier stations  120 . Each base amplifier station  120  also includes an amplifier for amplifying the received radio signals for re-transmission further downstream. More specifically, the output of each base amplifier station  120  is connected to an inter-building transformer station  130 .  
         [0023]    Each inter-building transformer station (ITS)  130  includes input terminals for receiving signals from base amplifier station  120  via copper wires  125 . Each ITS  130  includes an inlet/input filter  910  a transformer  920 , an outlet/output filter  930  and a distribution transformer  940  (see FIG. 9). Each ITS  130  also includes output terminals connected to a plurality of single-building transformer stations (STS)  140 .  
         [0024]    Each STS is typically associated with a single building (such as an apartment complex or office building). The STS  140  includes an input terminal for receiving radio transmissions from an inter-building transformer station  130 . STS  140  also includes an output terminal connected to a copper wire pair  145 . The copper wires  145  run throughout the building to a plurality of radio sockets  150 , each radio socket typically residing in a single apartment or office within the building. Each radio socket is connected to a radio speaker for generating acoustic signals representative of the radio signals received via copper wires  45 .  
         [0025]    Using this network, studio  100  broadcasts radio signals by transmitting the radio signals over copper wires  105  to ADC  110 . The ADC amplifies the received signal and re-transmits the amplified signal over each pair of copper wires  115  to a corresponding BAS  120 . Each BAS  120  amplifies the received radio signal and re-transmits the amplified signal over each pair of copper wires  125  to an ITS  130 . Each ITS  130 transforms the signal and transmits it over copper wires  135  to a plurality of STS units  140 . Each receiving STS  140  transforms the signal and transmits it over copper wires  145  to a plurality of radio sockets  150 . Thus, the radio signal emitted by studio  100  propagates throughout the radio network to every radio socket in the network. The radio signals are typically in the 0-10 kHz range.  
         [0026]    For simplicity of explanation, we assume that each radio socket of the radio-transmission network is located in an apartment, although as discussed above, such sockets are also located in offices, separate homes, etc. That is, the term “apartment” is used herein henceforth generically to refer to any place that has a radio-socket connection to a radio-transmission grid.  
         [0027]    A preferred embodiment of the present invention uses the above-described existing radio network to provide Internet-based services to apartments that have radio sockets. In a preferred system (see FIG. 2), a Central Switching and Routing Unit (A-1)  220  is installed into a structure housing ADC  110 . The A-1 unit is preferably the main operating point of the system, and is connected to the Internet  210  via high-speed fibre-optic lines  205 . It monitors, controls, and supervises the quality of service and the security of the entire system. It also performs switching and routing for the system; supports IP telephony, IP TV, high-speed access, and other Internet/intranet applications; provides system access to the Internet  210 ; and provides database services for system users and administrators. Preferred components for the construction of the A-1 unit are listed below in Table 1.  
         [0028]    Preferably the A-1 unit is connected by underground fibre-optic lines  215  to a plurality of area switching and routing units (A-2)  230 , each of which is installed into a structure that houses a BAS  120 . Each A-2 unit is the main operating point of an area network typically including sixty to one hundred residential or commercial buildings. The A-2 unit performs switching and routing for the entire area network; supports IP telephony, IP TV, high-speed access, and other Internet/intranet applications; and provides access to the remainder of the system. The number of A-2 units  230  depends on the number of buildings in the area, since each unit typically services sixty to one hundred buildings. Preferred components for the construction of the A-2 units are listed below in Table 2.  
         [0029]    As shown in FIGS. 2 and 3, each A-2 unit is connected to one or more low-speed modems (LSMs)  170 . Each LSM is also connected to a copper wire pair of the radio transmission network, preferably at a point between BAS  120  and an ITS  130  on copper wires  125 . The LSM receives Internet transmissions from the A-2 unit and re-transmits them on copper wires  125 . The term “low-speed modem” here merely refers to the fact that transmission is over copper lines instead of relatively high-speed fibre-optic lines—there is no requirement that the speed of transmission actually be slower than that over the high-speed optical lines. Likewise, the term “modem” is not intended to be unduly restrictive. In fact, the LSMs  240  are preferably 10Base-S switches that comply with the 10Base-S protocol, and not modems in the traditional “modulator-demodulator” sense. However, those skilled in the art will recognize that a variety of modem types (including, for example, ISDN and DSL-type “modems”) and transmission protocols could be used.  
         [0030]    The transmissions by LSM  240  on wires  125  are forwarded by ITS  130  to a plurality of STS units  140 . Each STS unit then forwards the transmission throughout its associated building by transmitting the signal on copper wires  145 .  
         [0031]    As shown in FIG. 2, some apartments may include an LSM  270  connected to the apartments&#39; radio sockets  150  for receiving the Internet transmissions on wires  145 . Each LSM  270  is connected to a personal computer  280 . In this manner, computer  280  can receive Internet transmissions. Similarly, the computer  280  can also send Internet transmissions via LSM  270  because the modem signal travels bi-directionally over the radio-transmission network without interfering with the existing radio signals. Such transmissions propagate over the building wires  145  to STS  140 . STS  140  then forwards the transmission to ITS  130  via wires  135 . Similarly ITS  130  forwards the transmission to LSM  240  via wires  125 . LSM  240  receives such Internet transmissions from wires  125  and forwards them to A-2 unit  230 , which then transmits these signals upstream to the Internet via optical fiber  215 , A-1 unit  220 , and optical fiber  205 . In a preferred embodiment, each LSM  240  is a 10Base-S switch and router, and each LSM  270  is a 10Base-S interface.  
         [0032]    Other apartments may include a high-speed interface card HSC  260  connected between the building wires  145  and a personal computer  280 . Each HSC is a network interface card that communicates between a personal computer  280  and the wires  145  of the building. To permit such HSC cards to communicate over the Internet, each A-2 unit  230  is connected by high-speed fibre-optic lines  255  to a plurality of A-3 units  250 , each of which is located in a single building. Each A-3 unit  250  is connected to the intra-building wires  145 . The A-3 unit  250  uses these existing wires to form a local area network for the building.  
         [0033]    In a preferred embodiment, HSC  260  and LSM  270  are network interfaces which employ the 10Base-S protocol. Each HSC/LSM unit is used to communicate with an LSM  240  or an A-3 unit  250 . Which type of unit an HSC/LSM unit communicates with is determined by the user&#39;s subscription level: HSC/LSMs of high-speed subscribers communicate with A-3 units  250 , while HSC/LSMs of low-speed subscribers communicate with LSMs  240 . A-3 units are capable of communicating with high-speed interface cards using 10Base-S, 100Base-T, or 1000Base-T protocols.  
         [0034]    Each A-3 unit  250  is preferably the main operating point within the building of a high-speed local area network formed by the personal computers  280  connected to the building&#39;s copper wires  145  by high-speed subscribers&#39;HSCs  260 . An A-3 unit  250  performs switching and routing for all computers that are part of its local network. The A-3 unit  250  is preferably connected to an A-2 unit  230  by fibre-optic cables  255  installed in the air, with the support of feeders located on the roof of the building, although ground-based cables or cables of non-fibre-optic composition could also be used. Preferred components for the construction of the A-3 units are listed below in Table 3. The physical connections between the A-1, A-2, and A-3 units and their components are depicted in FIGS. 3, 4, and  4  A.  
         [0035]    Thus, for apartment units that include an HSC card  260 , a personal computer  280  can communicate over the Internet via the relatively high-speed path formed by units A-3 250, A-2 unit  230 , and A-1 unit  220  and their associated optical cables  205 ,  215 , and  255 . However, for apartments which merely include an LSM interface card  270  (i.e., the apartment is a low-speed subscriber) the personal computer  280  communicates with the Internet via the alternative path formed by SST  140 , ITS  130 LSM  240 , A-2 unit  230 , A-1 unit  220  and their associated wires and optical cables.  
         [0036]    Preferably, LSM units  240  and  270  use a 10Base-S™ system (available from OLENCOM Electronics Ltd., Yokneam Illit 20692, P.O.B. 196, Israel), or a similar system, for transmission over copper wires. Similarly, A-3 units  250  and HSC units  260  communicate with the same 10 Base-S protocol.  
         [0037]    The 10Base-S system provides an extension to the IEEE 802.3 compliant 10BaseT Ethernet standard network. It combines DSL modulation technologies with Ethernet technology. The 10Base-S system provides a point-to-point link that can deliver half or full duplex 10BaseT Ethernet at the full 10 Mbps data rate. For telephone applications, it supports transmission of POTS or ISDN or PBX signaling simultaneously with data over the standard telephone-grade wire infrastructure.  
         [0038]    The 10Base-S system employs Quadrature Amplitude Modulation (QAM). QAM modulation uses both signal amplitude and phase to define each symbol. 10Base-S uses the most sophisticated QAM technology with various QAM modulations (QAM-256, QAM-128, QAM-64, QAM-32, QAM-16, QAM-8 and QAM-4). A specific modulation is chosen according to the line specification and the rate definition. 10Base-S is designed to support multi-QAM in order to achieve performance as close to the physical limit as possible, while maintaining low cost and low power. 10Base-S has higher capacity than both DMT TDD and regular QAM, when comparing capacity calculations (the calculation of physical capacity limitations). 10Base-S facilitates the transport of symmetrical bi-directional data over unshielded, copper twisted-pair wires. The 10Base-S system employs Frequency Division Duplexing (FDD) to separate the downstream channel, the upstream channel, and POTS, ISDN, or PBX signaling services, in the frequency domain. This enables service providers to overlay 10Base-S on existing POTS, ISDN, or PBX signaling services without disruption. Both 10Base-S and POTS/ISDN/FBX services may be transmitted over the same line without interfering with each other. Ethernet data is encapsulated onto a continuous stream of cells in a proprietary scheme. The system applies a self-synchronizing scrambler mechanism to this continuous, non-bursty data cell stream. The scrambler is initialized to a random value providing better de-correlation of the transmitted signals, and thus better FEXT performance when transmitted through a multi-pair copper cable. A sophisticated Reed-Solomon (RS) error correction code is also applied to the data stream, providing strong error detection and recovery capabilities. Upon reception, the Ethernet data is reassembled from the error free cell stream. 10Base-S technology operates at a continuous raw symmetrical bi-directional data rate of 11.25 Mbps. This allows transport of Ethernet data at the full standard line rate of 10 Mbps, in full duplex. The transport overhead does not reduce the Ethernet bandwidth and the system may thus be used totally transparently in a 10 Mbps Ethernet network.  
         [0039]    The 10Base-S system may be used as an essentially point-to-point communication system. The core data pump is a blind modem, capable of supporting point-to-multi-point transmission systems. Operation in the point-to-point arrangement avoids the need for the collision detection scheme by frequency separation of the downstream from the upstream and at the same time supports fall duplex operation. The physical Ethernet interface is a standard RJ-45 socket. The user may connect standard 10BaseT equipment, such as an Ethernet switch or an Ethernet NIC card, to the 10Base-S equipment using standard Ethernet cables.  
         [0040]    The 10Base-S transmissions on wires  145  do not interfere with the radio transmissions on the same wires because the power and frequency of the 10Base-S transmissions is substantially different from those of the radio transmissions. More specifically, the radio signals are of a much lower frequency content (0-10 k Hz) than the 10Base-S transmissions. Further, the radio signals have substantially more power than the 10Base-S transmissions. Thus, when a user activates a radio unit connected to radio socket  150  to listen to a radio program, the loudspeaker of the radio unit largely filters out the 10Base-S signals due to their relatively high frequency. Further, to the extent the 10Base-S signals include frequency components within the bandwidth of the loudspeaker, they are not perceptibly reproduced by the speaker because of their low power content.  
         [0041]    [0041]FIGS. 4, 4 A, and  4  B show in greater detail the components used to construct units A-1, A-2, and A-3 and how they are connected together.  
         [0042]    [0042]FIG. 5 illustrates, in general, the operation of the network when an individual user accesses the Internet via a low speed modem  270 . In the example shown, at step  510 , an A-1 unit  220  receives Internet data directed to the individual user. The A-1 unit  220  then at step  520  routes the received data to an A-2 unit  230  that services an area network of which the user is a member. The A-2 unit at step  530  receives the data and routes it to the LSM unit  240  that serves, typically with other buildings, the building in which the user resides. At step  540 , the LSM unit  240  receives the data and transmits it (preferably, using 10Base-S protocol) over radio-transmission lines through an STS  140  to the user&#39;s PC  280  via LSM  270  (preferably, a 10Base-S end-user unit).  
         [0043]    [0043]FIG. 6 illustrates, in general, the operation of the network when an individual user accesses the Internet via an HSC  260 . In the example shown, at step  610  an A-1 unit  220  receives Internet data directed to the individual user. At step  620  the A-1 unit  220  routes the data to the A-2 unit  230  that serves an area network of which the user is a member. The A-2 unit  230  at step  630  receives the data and routes it to an A-3 unit  250  that serves user&#39;s building. At step  640  the A-3 unit receives the data and transmits it over radio-transmission lines  145  to the user&#39;s PC  280  via HSC  260 , using the 10Base-S protocol.  
         [0044]    In one embodiment of the network, each A-2 unit  230  is connected to both a plurality of LSMs  240  and a plurality of A-3 units  250 . High-speed subscribers are connected to the A-2 units  230  via A-3 units  250 , and copper-wire-based, narrowband subscribers are connected to the A-2 units  230  via LSMs  240 . FIG. 7 depicts, in general, the operation of such a network.  
         [0045]    At step  710 , an A-1 unit  220  receives Internet data directed to an individual user. At step  720  the A-1 unit routes the data to an A-2 unit  230  that serves the area network of which the user is a member. At step  730 , the A-2 unit  230  receives the data. At step  740 , the A-2 unit  230  determines the identity of the user to which the data is directed, and checks the user&#39;s identity against a database of users.  
         [0046]    If the user is a high-speed-service subscriber, and thus located in a building that has an A-3 unit  250 , then at step  755  the A-2 unit routes the data via high-speed lines  255  to the A-3 unit  250  that services the user&#39;s building. At step  760  the A-3 unit  250  receives the data, and at steps  770  and  780  the A-3 unit  250  routes the data over the building&#39;s radio-transmission lines to the user&#39;s LSM  270 .  
         [0047]    Returning to step  740 , if the user is not a subscriber to high-speed services, then at step  745  the A-2 unit  230  routes the data to an LSM  240  that serves the user&#39;s building, and at step  750  the LSM  240  receives the data and transmits it over radio-transmission lines to the user&#39;s LSM  270 .  
         [0048]    In another embodiment, when a building (such as building  235  ) has both high-speed and low-speed subscribers, all Internet signals are sent from the A-2 unit  230  to the building&#39;s A-3 unit  250 . This includes those signals directed to low-speed subscribers in the building. In this embodiment, the LSM units  270  are 10Base-S units, so the A-3 unit  250  transmits Internet signals directed to low-speed subscribers directly to their LSM units  270 .  
         [0049]    In a further alternate embodiment, the A-3 unit is connected to an LSM unit (not shown) that in turn is connected to the intra-building copper-wire network  145 . Then, if a packet is to be sent to a low-speed subscriber, the A-3 unit receives it and routes it to the attached LSM, which then sends it to the user&#39;s LSM  270 . In a still further embodiment, the LSM attached to the A-3 unit is capable of receiving signals from an LSM unit  240  and routing them to the attached A-3 unit. This configuration has the advantage of redundancy: if the fibre-optic communication line to the A-3 unit is broken, high-speed subscribers can still use the low-speed system, and if the copper-wires (or LSMs  240  ) are down, low-speed subscribers can still receive Internet services via the A-3 unit.  
         [0050]    While the subject invention has been particularly shown and described with reference to preferred embodiments of the systems and methods thereof, it will also be understood by those of ordinary skill in the art that various changes, variations, and modifications in form, details, and implementation may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.  
         [0051]    For example, although the A-1, A-2, A-3, LSM, and HSC units have been described herein with great specificity regarding part numbers and configurations, those skilled in the art will recognize that the functionality of each of these units can be substantially duplicated by a wide variety of configurations of various components by various manufacturers.  
         [0052]    Also, although the above embodiments have been described primarily as they apply to radio-transmission networks, those skilled in the art will recognize that the subject invention also can be applied in other contexts. For example, ordinary telephone lines also form a copper-wire network to which the invention can be applied.  
                                                                                                                                                                         TABLE 1                           Unit A-1 Components            No   Catalog Code   Description                    2xCatalyst6500-L2       (20x1GB: 2xLX/LH - A2, 8xSX - Red6500, 1xSX - GSR, 9 - empty;       48x10/100 - empty)            1   WS-C6509   Catalyst 6509 Chassis       2   WS-CDC-1300W   Catalyst 6000 1300W DC Power Supply       3   WS-CDC-1300W/2   Catalyst 6000 Second 1300W DC Power               Supply       4   WS-X6K-SUP1A-   Catalyst 6000 Supervisor Engine 1-A, 2GE,           PFC   plus PFC       5   WS-X6408-GBIC   Catalyst 6000 8-port Gigabit Ethernet               Module (Req. GBICs)       6   WS-G5486   1000BASE-LX/LH “long haul” GBIC               (singlemode or multimode)       7   WS-G5484   1000BASE-SX “Short Wavelength” GBIC               (Multimode only)       8   WS-X6348-RJ-45   Catalyst 6000 48-port 10/100, Enhanced               QoS, RJ-45            Cisco12000 GSR       (2x1GB; 1xSX-Cat6500, 1xSX-Cisco7200)            1   GSR8/40   Cisco12008 GSR 40Gbps; 1GRP, 1CSC-               GSR8, 3SFC-GSR8, 1DC       2   GRP   Route Processor, 128MB       3   MEM-DFT-   Default 128MB GRP and L.C. Program/           GRP/LC-128   Route Memory (1x128MB)       4   MEM-GRP-FL20   20MB PCMCIA Flash Memory       5   GRP/R   GSR Route Processor, Redundant Option       6   MEM-DFT-   Default 128MB GRP and L.C. Program/           GRP/LC-128   Route Memory (1x128MB)       7   MEM-GRP-FL20   20MB PCMCIA Flash Memory       8   PWR-GSR8-DC/2   Cisco 12008 GSR Redundant DC Supplies               (2 DC Supplies)       9   S120Z-12.0.8S   Cisco 12000 Series IOS SERVICE               PROVIDER       10   GE-SX/LH-SC=   GSR12000 single port Gigabit Ethernet line               card, Spare       11   GBIC-SX-MM   1000base-SX GBIC module, multimode,               standardized for GSR12000            Cisco7206VXR       1x1GB/SX-GSR, 1xPOS-OC-3)            1   CISCO7206VXR/NS   7206VXR Bundle with NSE-1 and I/O           E-1   Controller with FE       2   PWR-7200-DC   Cisco 7200 DC Power Supply Option       3   PWR-7200/2-DC   Cisco 7200 Dual DC Power Supply Option       4   S72C-12101E   Cisco 7200 Series IOS IP       5   FR-WPP72   Cisco IOS 7200 Series WAN Packet               Protocols/Netflow License       6   MEM-I/O-FLC20M   Cisco 7200 I/O PCMCIA Flash Memory,               20 MB Option       7   MEM-SD-NPE-   128MB Memory for NPE-300/NPE-225/           128MB   NPE-175 in 7200 Series       8   PA-POS-OC3SMI   1-Port Packet/SONET OC3c/STM1               Singlemode (IR) Port Adapter       9   PA-MC-8E1/120   8 port multichannel E1 port adapter with               G.703 120ohm interf       10   PA-GE   Gigabit Ethernet Port Adapter       11   GBIC-SX=   Gigabit Intf. Converter For 1000BASE-SX               (Short Wavelength)            CiscoAS5300 (60xDigital Voice)            1   AS5300   AS5300 Dial Shelf       2   AS53-DC-RPS=   Dual DC Power Supply, AS5300, Spare       3   S53CVP-12.0.5T   Cisco AS5300 Series IOS IP VOICE PLUS       4   AS53-E1-60VOXD   60 Voice channels &amp; Quad E1+ card.               Upgradable to 120 channel       5   VC-SWA-4.10   Voice card sw, all codes incl. G.711, G.729,               G.726, G.723.1, FAX            Console Server            1   AS2511-RJ   Cisco Access Server 2511-RJ Ethernet/               Serial/16 Async       2   S25C-12.0.5T   Cisco 2500 Series IOS IP            Network Management System            1   CWLMS-1.0-SOL   LAN Mgmt for SOL, incl: CM 3, RME 3,               CV 5, TD5, CFM 1, +Doc       2   NFC-SOSU-3.0   NetFlow Collector For Solaris Incl Network               Data Analyzer 3.0       3   CWVM-2.0-SOL   CW2000 Voice Manager 2.0 Solaris,               Includes SW and Doc       4   CNR-3.5   Cisco Network Registrar 3.5, base, 1250               nodes, all platforms       5   JI255AA   HP OV NNM 6.0 250 for Solaris LTU       6   A23-ULD1-9L-   Creator3D, series 3 Graphics, 18.2-GB 10K           512AQ   RPM Internal Drive       7   X7124A   24-inch color monitor       8       Manual-eject floppy drive for Ultra 60 and               80 systems installed in system chassis       9   X6166A   32x Internal CD-ROM drive       10   X6282A   12GB 4mm DDS-3 Internal tape drive       11   X3860A   Fast-narrow SCS-2 Cable for connecting               X-options to Ultra 2.       12   SOLMS-260ID999   Solaris 2.6 Standard (Latest Rel.) English               Desktop Media Kit Limited Export Edition       13   @XRUSSIAN-CC   International Type 5 Country Kits Russian            Cache System            1   R28 GB7 NCE   CacheRaQ 2, 256MG, 12.7GB, Euro cable                  
 
         [0053]    [0053]                                                 TABLE 2                           Unit A-2 Components            No   Catalog Code   Description                    Catalyst6500-L3       (2xLX/LH 1GB-A1; 48X10/100 - A3)            1   WS-C6509   Catalyst 6509 Chassis       2   WS-CDC-1300W   Catalyst 6000 1300W DC Power Supply       3   WS-CDC-1300W/2   Catalyst 6000 Second 1300W DC Power               Supply       4   WS-X6K-SUP1A-   Catalyst 6000 Supervisor Engine 1-A, 2GE,           MSFC   plus MSFC &amp; PFC       5   MEM-MSFC-   Catalyst 6000 MSFC Mem, 128MB DRAM           128MB   Option       6   MEM-C6K-FLC24M   Catalyst 6000 Supervisor PCMCIA Flash               Mem Card, 24MB Option       7   SC6MSFCC-   Catalyst 6000 MSFC IOS Flash Image - IP           12.0.7XE       8   WS-X6K-S1A-   Catalyst 6000 Redundant Supervisor 1A,           MSFC/2   2GE, w/MSFC &amp; PFC       9   MEM-MSFC-   Catalyst 6000 MSFC Mem, 128MB DRAM           128MB   Option       10   MEM-C6K-FLC24M   Catalyst 6000 Supervisor PCMCIA Flash               Mem Card, 24MB Option       11   SC6MSFCC-   Catalyst 6000 MSFC IOS Flash Image - IP           12.0.7XE       12   WS-G5486   1000BASE-LX/LH “long haul” GBIC               (singlemode or multimode)       13   WS-X6348-RJ-45   Catalyst 6000 48-port 10/100, Enhanced               QoS, RJ-45       14   NC316BU-16/DC   16-slot Chassis with Internal −48DC Power               Supply       15   NC316-16RPSDC   Redundant Power Supply for NC316BU-16               (−48V DC)       16   EM316NM   SNMP Management Module with 1               10Base-T Port       17   EM316F/S1   100Base-TX to 100Base-FX (SM:1310nm:               0-25km: DSC)                    
         [0054]    [0054]                                                 TABLE 3                           Unit A-3 Components            No   Catalog Code   Description                    Catalyst2924       (23X10/100; 1X100 - A2)            1   WS-C2924-XL-EN   24-port 10/100 Switch (Enterprise Edition)       2   EM316F/S1   100Base-TX to 100Base-FX (SM:1310nm:               0-25km: DSC)       3   NC316BU-1HP/AC   Single-slot High Power Chassis with Internal               90-240V AC Power Supply