F9R28T09A01A11BMainstreet Broadband Wireless System - CPE Unit

April 30,1999 Federal Communications Commission EQUIPMENT APPROVAL SERVICES P.O. Box 358315 Pittsburgh, PA 15251-5315 Reference: Request for FCC Equipment Authorization Certification Newbridge Networks Corporation is in the process of completing a new product for the Local Multipoint Distribution System (LMDS) band and has requested for a FCC Equipment Authorization Certification. The Form 731 has been completed and submitted to the FCC. These services, assigned to the 27,500 to 28,350 MHz band are covered under Part 101: Fixed Microwave Services of the Federal Communications Commission Rules and Regulations. The product is called the Mainstreet Broadband Wireless System, which provides all the advantages of ATM (Asynchronous Transfer Mode). These advantages include the convergence of voice, data and video, scalability; and maintenance and control of quality of service to the customer site using cost effective microwave transmission. Company Name: Newbridge Networks Corporation Product Name:Mainstreet Broadband Wireless System Frequency Range:27,500 - 28,350 MHz Frequency Stability:+/- 10ppm BTS Emission Designator:216M DXW FCC ID#:F9R28T36A06A11A Confirmation #:EA94075 Rated RF Output Power:0.5 Watts CPE Emission Designator:9M00 DXW FCC ID#:F9R28T09A01A11B Confirmation #:EA94077 Rated RF Output Power:0.08 Watts Address:600 March Road Kanata, Ontario CanadaK2K 2E6 Telephone:613-591-3600 Fax:613-599-3654 Contact:Vito Scaringi EMC/ Wireless Approvals Specialist 613-599-3600 ext:2389 email: [email protected] I hereby certify that this application was prepared to the best of my knowledge and belief, and the accompanying information/ exhibits are true and correct. Sincerely Vito Scaringi Vito Scaringi EMC/Wireless Approvals Specialist Newbridge Networks Corporation 613-599-3600 ext: 2389 List of Attachments A. Memo for confirmation of Application for Equipment Authorization Certification, FCC Form 731 B. System Overview/ Operational Description C. Basestation (BTS) requirements ! External and Internal Photos ! Labels drawings ! ARIC card - Operational Description - Block Diagrams
Test Report
Schematics , only ARIC D. Customer Premises Unit (CPE) Requirements ! External and Internal Photos ! Labels drawings ! NIU - Operational Description - Block Diagrams
Test Report
Schematics , only ARIC E. Instruction Manual F. Marketing Specifications G. Newbridge Articles and New Releases

Date: April 30, 1999 Note! All schematics and operational descriptions of the RF modules for the BTS and CPE are not accessible due to confidentiality from the supplier. All documents for the RF section will be sent to the FCC directly by the Radio supplier.

April 30,1999 Federal Communications Commission EQUIPMENT APPROVAL SERVICES P.O. Box 358315 Pittsburgh, PA 15251-5315 Reference: Request for FCC Equipment Authorization Certification Newbridge Networks Corporation is in the process of completing a new product for the Local Multipoint Distribution System (LMDS) band and has requested for a FCC Equipment Authorization Certification. The Form 731 has been completed and submitted to the FCC. These services, assigned to the 27,500 to 28,350 MHz band are covered under Part 101: Fixed Microwave Services of the Federal Communications Commission Rules and Regulations. The product is called the Mainstreet Broadband Wireless System, which provides all the advantages of ATM (Asynchronous Transfer Mode). These advantages include the convergence of voice, data and video, scalability; and maintenance and control of quality of service to the customer site using cost effective microwave transmission. Company Name: Newbridge Networks Corporation Product Name:Mainstreet Broadband Wireless System Frequency Range:27,500 - 28,350 MHz Frequency Stability:+/- 10ppm BTS Emission Designator:216M DXW FCC ID#:F9R28T36A06A11A Confirmation #:EA94075 Rated RF Output Power:0.5 Watts CPE Emission Designator:9M00 DXW FCC ID#:F9R28T09A01A11B Confirmation #:EA94077 Rated RF Output Power:0.08 Watts Address:600 March Road Kanata, Ontario CanadaK2K 2E6 Telephone:613-591-3600 Fax:613-599-3654 Contact:Vito Scaringi EMC/ Wireless Approvals Specialist 613-599-3600 ext:2389 email: [email protected] I hereby certify that this application was prepared to the best of my knowledge and belief, and the accompanying information/ exhibits are true and correct. Sincerely Vito Scaringi Vito Scaringi EMC/Wireless Approvals Specialist Newbridge Networks Corporation 613-599-3600 ext: 2389 List of Attachments A. Memo for confirmation of Application for Equipment Authorization Certification, FCC Form 731 B. System Overview/ Operational Description C. Basestation (BTS) requirements ! External and Internal Photos ! Labels drawings ! ARIC card - Operational Description - Block Diagrams
Test Report
Schematics , only ARIC D. Customer Premises Unit (CPE) Requirements ! External and Internal Photos ! Labels drawings ! NIU - Operational Description - Block Diagrams
Test Report
Schematics , only ARIC E. Instruction Manual F. Marketing Specifications G. Newbridge Articles and New Releases

Date: April 30, 1999 Note! All schematics and operational descriptions of the RF modules for the BTS and CPE are not accessible due to confidentiality from the supplier. All documents for the RF section will be sent to the FCC directly by the Radio supplier.

June 17,1999 Subject: Updated Information for FCC Equipment Authorization Certification Newbridge Networks Corporation has just received the updated version for the NIU unit, which improves the performance of the system and cleans the layout of the motherboard. By doing so, the spurious level and the spectrum shape has improved and now does comply with the FCC part 101 requirements. Therefore, as previously mentioned in the CPE test report, where the spectrum mask and spurious levels did not comply, I am forwarding the FCC a new test report (V1.1) with the latest results, as well as the new drawings and Bill of Material of the new motherboard. Old Issue (omit)New Issue 1) Test Report V1.0Test Report V1.1 2) SchematicsSchematics Commercial Gateway MotherboardCommercial Gateway Motherboard 007-141452- R1007-146445- R2 3) Bill of Material Bill of Material 141452 146445 Also, note that the schematics for all the RF modules have been sent electronically a few weeks ago . Company Name: Newbridge Networks Corporation Product Name:MainStreet Broadband Wireless System Frequency Range:27,500 - 28,350 MHz Frequency Stability:+/- 10ppm CPE Emission Designator:9M00 DXW FCC ID#:F9R28T09A01A11B Confirmation #:EA94077 Rated RF Output Power:0.08 Watts Address:600 March Road Kanata, Ontario CanadaK2K 2E6 Telephone:613-591-3600 Fax:613-599-3654 Contact:Vito Scaringi EMC/ Wireless Approvals Specialist 613-599-3600 ext:2389 email: [email protected] I hereby certify that this application was prepared to the best of my knowledge and belief, and the accompanying information/ exhibits are true and correct. Sincerely Vito Scaringi

Oct. 25,1999 Federal Communications Commission EQUIPMENT APPROVAL SERVICES P.O. Box 358315 Pittsburgh, PA 15251-5315 Reference: Request for Confidentiality Newbridge Networks Corporation is in the process of completing a new product for the Local Multipoint Distribution System (LMDS) band and has requested for the FCC to keep certain documents confidential. The list below mentions the documents that need be keep confidential due to non-disclosure agreements with our OEM suppliers. Company Name: Newbridge Networks Corporation Product Name:MainStreet Broadband Wireless System BTS Emission Designator:216M DXW FCC ID#:F9R28T36A06A11A Confirmation #:EA94075 CPE Emission Designator:9M00 DXW FCC ID#:F9R28T09A01A11B Confirmation #:EA94077 Address:600 March Road Kanata, Ontario CanadaK2K 2E6 Telephone:613-591-3600 Fax:613-599-3654 Contact:Vito Scaringi EMC/ Wireless Approvals Specialist 613-599-3600 ext.: 2389 Email: [email protected] Vito Scaringi EMC/Wireless Approvals Specialist Newbridge Networks Corporation 613-599-3600 ext.: 2389 List of Material to maintain Confidentiality A. Basestation (BTS)
All Schematics for the ARIC and the OTU and ORU
All Bill of Materials for the ARIC and the OTU and ORU B. Customer Premises Unit (CPE)
All Bill of Materials for the NIU and the OTRU
All Schematics , for the NIU and the OTRU

Date: April 30/99 Mainstreet Broadband Wireless (Release 1.1) System Overview/ Operational Description INTRODUCTION This document provides a system overview for the Release 1.1 Newbridge Mainstreet Broadband Wireless Product . The information listed is a simplified version of the overall system technical specification. System Overview The Broadband Wireless product portfolio is a family of products that are designed to work together. The Broadband Wireless System is a network of Network Interface Units connected to Base Stations via wireless links and the Base Stations are, in turn, connected to the ATM Backbone Network via wired or point to point wireless links. The network is augmented by a Network Manager. A high level view of the network is shown below (Figure 1.0). As shown in the figure, the cellular network structure is based on overlapped 4-sectored cells. OC-3 Cell Relay 2 x OC-3 Cell Relay ATM Network Database 46020 Network Management Internet PSTN TDM Frame Relay Cell Relay Circuit Emulation Cell Relay n x OC-12 Cell Relay Low Capacity Cell Mid Capacity Cell Mid Cap Sectored Figure 1.0 Broadband Wireless Network Topology The Broadband Wireless system provides a communications infrastructure with both WAN and ATM points of attachment. The key features provided by the Broadband Wireless System are: a) high-bandwidth b) flexible bandwidth assignment c) scalability d) speed of deployment Error! Reference source not found. shows a simple application of a Release 1.1 Broadband Wireless System. In the diagram, the devices are divided into the Broadband Wireless System proper (the elements on the unshaded background) and external devices (the elements on the shaded background). BTS(36170) T1 NIU E1 NIU ATM (Backbone) Network 46020 E1 T1 PBX MUX Ethernet NIU PC Ethernet 45020 PC Ethernet Figure1.2: System Overview The Broadband Wireless product is targeted at fixed wireless broadband applications, such as local access loops, point-to-point links etc. The system consists of the following components. • Backbone Network The backbone system is an ATM network interconnecting all BTSs to various services and to the 46020 network manager. A BTS may also function as a backbone component. • Base Transceiver System (BTS) The BTS is the hub that delivers and collects all the wireless traffic from and to the subscribers in the BTS coverage area. The BTS is also the linking point between the subscribers and the Backbone Network. The BTS can also support standard 36170 wireline services. • Network Interface Unit (NIU) A NIU is situated at the subscriber location. The NIU is used to provide a wireless connection between the CPE and the BTS. In this release two types of NIUs are supported, each providing a single interface. Backbone Network The Backbone Network is an ATM network and/or TDM network connected to the wireless network at one or more points. The 36170 based BTS can easily work with the backbone system through standard cell relay interfaces, such as T1/E1, DS3/E3, or OC3/STM1, etc. Base Transceiver System The Rls 1.1 base station platform is based on Rls 4.0 of the 36170 multi services platform. The card cages are 19” rack assemblies with the following dimensions: • 48 cm (19”) wide • 53 cm (21”) high • 29 cm (11.5”) deep Single Shelf BTS System Figure 1.3 shows a typical single shelf base-station / backbone. In this configuration, all switching and control functions are self contained in a single peripheral shelf. Full control and switching fabric redundancy is supported as shown in the figure. Non redundant configurations are also available through de-populating the appropriate control and hub cards. A single shelf supports 12 universal card slots (UCS), with an aggregate switching capacity of 1.6 Gbps. A single slot is capable of supporting up to an OC-3 of bandwidth. For the Rls 1.1 product , the TDMA ARIC cards occupy two peripheral card slots. In addition to the UCS slots, the peripheral shelf supports a fully redundant (X and Y switching planes) switching matrix using two additional card slots. These are optionally populated with either switching hub cards (single shelf configurations) or regular hub cards (in multishelf configurations). TDMA ARICs Figure 1.3 Single Shelf Base-Station / Backbone Switch Single Shelf BTS Configuration Provides the configuration for a single shelf, 4 sector base station supporting redundancy on the control, switching, backbone interconnect and radios. QuantityCard TypeNotes 1 Peripheral shelf 2 Control cardsFully redundant control configuration 2 Switching HUB cardsFully redundant switching matrix 4 TDMA ARICsOne ARIC per sector (non redundant), one down stream & two upstream carriers per sector 2 OC-3 Cell relayFully redundant backbone aggregate cards 1 SSUTiming source 1 GPS receiverOptional if timing is not taken from the backbone OC- 3s 8 12 port combiner splitter unitsTwo per sector ( TX and RX) 8 OTUsFully redundant OTUs per sector 8 ORUsFully redundant OTUs per sector Single shelf BTS configuration Multishelf BTS System For growth beyond a single shelf, the switching matrix capacity is expanded with the addition of a pair of switching shelves, and additional peripheral shelves are added to the BTS forming a multi-shelf complex as shown in Error! Reference source not found. . One switching shelf is required per control plane. In this configuration, the switching hub cards, located in the peripheral shelf, are replac…

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General Description OTRU 05/04/99 8:15 AM The OTRU (Outdoor Transmitter Receiver Unit) is part of an LMDS (Local Multipoint Distribution System) networking system. The OTRU provides a wireless interface between the HUB RF equipment and the subscriber. Within the OTRU, a frequency translation from the transmitted and received RF to the baseband intermediate frequencies, is accomplished through the use of local oscillators and mixers. The baseband frequencies are passed to and from a modem, located inside the subscriber’s premises, through a coax connection. The frequency translation is accomplished using two CRO’s (coaxial resonating oscillators). The CRO’s are phase looked to a 20 MHz crystal reference, which provides a stability of 20 ppm over temperature and time for 17 years. Using a common reference, ensures frequency coherence between the transmitter and receiver paths inside the OTRU. The 20 ppm stability of the 20 MHz reference, satisfies the stability requirement for the radio system. The CRO’s are multiplied in frequency to generate the required local oscillator frequency. Two frequency conversions are needed, on both the transmitter and receiver paths, to produce the proper RF and IF, respectively. Due to the nonlinear nature of mixer and multiplier components, spurious signals are generated in the form of harmonics and mixing products of the fundamental and intermediate frequencies. The proper selection of mixing components, which naturally reject these products, reduces the level of unwanted signals. One or more bandpass filters are used after each mixer and multiplication stage. The filters are designed to pass the wanted signals but reject unwanted spurious. Making use of the frequency limitations, on both active and passive components, help attenuate some of the harmonics and mixing products. The OTRU was designed to utilize the cutoff frequency of WR-28 waveguide to significantly reject critical mixing products and frequency images at the RF output. Although the OTRU does have voltage variable attenuators for temperature compensation, it does not posses automatic gain control circuitry. The maximum TX output power is limited by the finite output power of the last amplifier stage. The typical saturated output power transmitted from the OTRU is 24 dBm or 0.251 W. As an added safety measure, the OTRU will turn off the transmitter if for any reason the local oscillators lose phase lock with the crystal reference.

Quick and easy to deploy, the Newbridge ® broadband wireless access solution enables operators to capture new markets and revenue immediately. Its multiservices platform supports the simultaneous delivery of data, Internet, voice and video, and its integrated network and service management permits one- platform management of both wireline and wireless resources. Value-added applications also provide a host of differentiated business and residential services. Key components of the Newbridge broadband wireless solution are the 28110/28120 MainStreet ® NIUs (network interface units). NIUs provide the native termination interface to the customer’s in-building network. The broadband wireless product portfolio is a family of products that are designed to work together. NIUs are connected to multi- services base stations via wireless links, and the base stations are, in turn, connected to the backbone network through wired or point- to-point wireless links. The system provides a communications infrastructure with both narrowband WAN and broadband ATM points of attachment. The entire network is managed, end-to-end by the industry-leading MainStreetXpress ™ network and service management suite. Highly scalable and fully managed as part of a multiservices solution, Newbridge broadband wireless products together provide a powerful, cost-effective broadband wireless access solutionfor last- mile delivery of a wide range of data, Internet, voice and video services. 28110/28120 MainStreet Network Interface Units RELEASE 1.1 8765_NIU dts.qxd 10/31/98 3:26 AM Page 3 28110/28120 MainStreet NETWORK INTERFACE UNITS 28110/28120 MainStreet NIUs In order to take advantage of the wide range of services enabled by the Newbridge broad- band wireless solution, the NIUs must be able to handle multiple high speed services. Newbridge offers various types of in-building NIUs to deliver high speed data and Internet, voice, video and multimedia services to the desktop. Small office home office (SOHO) environ- ments can benefit from NIUs designed to provide Ethernet LAN connectivity and PBX extension from the corporate network. Remote offices gain communications advantages through the cost-effective pro- visioning of high speed Internet access via Ethernet, as well as connections supporting POTS or T1/E1 through multiple T1/E1 or fractional OC-3c/STM-1 links. The NIU resides on the customer premises and is connected on the network side to an external transceiver that combines the functions of transmitter and receiver. The customer side connects to customer premises equipment, such as specialized NTUs (network termination units), PBXs (private branch exchanges), routers or video servers. NIUs can “see” the entire downstream spectrum and transmit on any upstream frequency. However an NIU receives on one tuned frequency channel and transmits on one frequency channel at a time. The NIU is connected to an external trans- ceiver in a fixed position with one antenna. Multiple NIUs can be combined at the customer premises (up to two per outdoor transceiver/antenna), by splitting the IF cabling using inline passive combiners and splitters. NIUs are managed using SNMP (simple network management protocol). In addition, once it has registered with the network, NIUscan be configured from a MainStreetXpress 45020 Element Manager or an NMTI session can be initiated via Telnet from a MainStreetXpress 46020 Network Manager. This data sheet provides specifications for the following NIUs: •28110 MainStreet T1 CE (circuit emulation) + Ethernet NIU, with a single T1 interface supporting either full or fractional T1 ser- vices, and a single 10Base-T Ethernet port •28120 MainStreet E1 CE + Ethernet NIU, with a single E1 interface supporting either full or fractional E1 services, and a single 10Base-T Ethernet port Wireline/Wireless Customer Service Billing Base Station (Detailed View) MainStreetXpress 46020 Wireline/Wireless Base Station Management ATM Base Station Internet Service Provider Carrier Customer PSTN Newbridge Wireless Transmitter/Receiver Backbone Network MainStreetXpress 36170 MainStreetXpress 36190 8765_NIU dts.qxd 10/31/98 3:26 AM Page 4 T1 Circuit Emulation NIU The 28110 MainStreet T1 CE + Ethernet NIU supports a standard T1 circuit emulation interface, and provides both full and fractional interfaces. In addition, the T1 CE NIU supports a single 10Base-T Ethernet port that provides RFC 1483 bridging functionality. The T1 CE + Ethernet NIU supports local configuration via a TIA/EIA-232 port. The NIU may be configured from the MainStreetXpress 46020 Network Manager or the MainStreetXpress 45020 Element Manager. E1 Circuit Emulation NIU The 28120 MainStreet E1 CE NIU supports a standard E1 circuit emulation interface and provides both full and fractional inter- faces. In addition, the E1 CE NIU supports a single 10Base-T Ethernet port that provides RFC 1483 Bridging functionality. The E1 CE + Ethernet NIU supports local configuration via a TIA/EIA-232 port. The NIU may be configured from the MainStreetXpress 46020 Network Manager or the MainStreetXpress 45020 Element Manager. Technical Summary System Features •T1/E1 (clear or channelized with 10Base-T Ethernet) •Fractional T1/E1 Asymmetric Services •Up to 4:1 up link- downlink asymmetry for Ethernet traffic •QPSK-based NIUs Network and Element Management •MainStreetXpress 46020 Network Manager •MainStreetXpress 45020 Element Manager Related Products •MainStreetXpress 36170 Multiservices Switch •ARIC card for MainStreetXpress 36170 Multiservices Switch •ISC card for MainStreetXpress 36170 Multiservices Switch •Customer premises RF transceivers and antennas Minimum Component Requirements for Broadband Wireless Solution •One 36170 peripheral shelf •One control card interconnect panel •One system synchronization unit •One switching hub card (two for redundancy) •One control card (two for redundancy) •One ATM radio interface card •One OC-3/STM-1 card (assuming the base station is co…

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Quick and easy to deploy, the Newbridge ® broadband wireless access solution enables operators to capture new markets and revenue immediately. Its multiservices platform supports the simultaneous delivery of data, Internet, voice and video, and its integrated network and service management permits one- platform management of both wireline and wireless resources. Value-added applications also provide a host of differentiated business and residential services. A key component of the Newbridge broadband wireless solution is the MainStreet ® customer premises outdoor radio equipment comprising either a 30 cm (12 in.) or 60 cm (24 in.) high gain antenna and an outdoor transceiver. The broadband wireless product portfoliois a family of products, that are designed to work together. NIUs (network interface units) are connected tomultiservicesbase stations via wireless links, and the base stations are, in turn, connected to the backbone network through wired or point-to-point wireless links. The system provides a communications infrastructure with both narrowband WAN and broadband ATM points of attachment. The entire network is managed end-to-end by the industry-leading MainStreetXpress ™ network and service management suite. Highly scalable and fully managed as part of a multiservices solution, Newbridge broadband wireless products together provide a power- ful, cost-effective broadband wireless access solution for last- mile delivery of a wide range of data, Internet, voice and video services. MainStreet Customer Premises Outdoor Radio Equipment RELEASE 1.1 8764_CustPrem_dts.qxd 10/31/98 3:22 AM Page 3 MainStreet CUSTOMER PREMISES OUTDOOR RADIO EQUIPMENT Broadband wireless customer premises equipment (CPE) can serve a wide variety of customers such as large- and medium- sized businesses, SOHOs (small office, home office), single unit residences and multiple unit dwellings. It can provide a combination of services, including data, high speed Internet, voice, video and interactive media. Situated at customer premises, this equipment consists of an environmentally sealed, integrated antenna/outdoor transceiver, and an NIU. The NIU provides the termination interface to the customer’s in-building network. The integrated outdoor RF assembly consists of the following: •30 cm (12 in.) or 60 cm (24 in.) high gain antenna •outdoor transceiver Solid State Customer Site Outdoor Transceiver Reliable and cost-effective, the customer site outdoor transceiver (OTR) is integrated with its respective antenna and provides the following functionality: •Multicarrier, wide bandwidth low noise amplification and down-conversion •Single carrier up-conversion and power amplification •Integrated antennas are available in both high gain (+42 dBi) and low gain (+36 dBi) variants, and are designed to be installed on the antenna tower or building rooftop at the customer premises •DC power and up/down IF signals delivered via single coaxial cable Customer Site Antenna (24 - 31.3 GHz) The high gain (+42 dBi) or low gain (+36 dBi) customer site antenna is collocated with its respective transceiver. The antenna is a Cassegrain design, approximately 60 cm (24 in.) or 30 cm (12 in.) in diameter, and provides a highly focused beam. A single antenna is employed for both contiguous or split band licensing. Wireline/Wireless Customer Service Billing MainStreetXpress 46020 Wireline/Wireless Base Station Management Internet Service Provider Carrier Customer PSTN Newbridge Wireless Transmitter/Receiver Backbone Network MainStreetXpress 36170 MainStreetXpress 36190 Base Station (Detailed View) ATM Base Station 8764_CustPrem_dts.qxd 10/31/98 3:22 AM Page 4 Router PBX 3624 MainStreet Newbridge Wireless Transceiver with Integrated Antenna NIU Customer Premises Equipment Technical Specifications Solid State Customer Site Outdoor Transceiver: Electrical Performance Attributes •RF output frequency: 24 – 31.3 GHz range, bandwidth and center frequency defined/selected to meet license and usage requirements •Transmit mode: •Maximum output RF power: 100 mW at P1dB •Typical power delivered to transmitted carrier: +17 dBm typical •Receive mode: •RF noise figure: < 4 dB at 25°C •Out-of-band rejection: > 25 dB at 50 MHz from defined band edge •Input RF compression: -30 dBm at P1dB, for single carrier operation •Phase noise: available in two variants; QPSK (low stability variant) and 16/64 QAM (high stability variant) •DC power consumption: < 15 W Customer Site Antenna (24 – 31.3 GHz): Electrical Performance Attributes •RF output frequency: 24 – 31.3 GHz range •Polarization: vertical or horizontal linear, selected at time of deployment •Cross polarization isolation: -30 dB, mainbeam -15 dB, side and backlobes •Peak gain: +42 dBi, copolarized (high gain variant), +36 dBi copolarized (low gain variant) •Beamwidth (3 dB): approximately 1.2°(high gain variant), approximately 2.2°(low gain variant) •Sidelobe levels (typical): -15 dB, first sidelobe -40 dB, backlobe Operating Environment •-40°to 50°C •0% to 100% relative humidity Dimensions •low gain variant: 30 cm (12 in.) diameter •high gain variant: 60 cm (24 in.) diameter 8764_CustPrem_dts.qxd 10/31/98 3:22 AM Page 5 Corporate Headquarters Newbridge Networks Corporation 600 March Road, P.O. Box 13600 Kanata, Ontario Canada K2K 2E6 Telephone: +1 613 591 3600 Facsimile: +1 613 591 3680 Internet:www.newbridge.com North and South America Newbridge Networks Inc. 593 Herndon Parkway Herndon, Virginia U.S.A. 20170-5241 Telephone: 1 800 343 3600 +1 703 834 3600 Facsimile: +1 703 471 7080 Europe, Middle East and Africa Newbridge Networks Limited Coldra Woods, Chepstow Road Newport, South Wales NP6 1JB U.K. Telephone:+44 (0) 1633 413600 Facsimile:+44 (0) 1633 413680 Asia Pacific Newbridge Networks Sdn. Bhd. Unit 1201 Level 12, Uptown Two 2, Jalan SS 21/37 Damansara Uptown 47400 Petaling Jaya Selangor Darul Ehsan, Malaysia Telephone: +60 3 715 8400 Facsimile: +60 3 715 8415 Printed in Canada 97-2887-01-00-A Newbridg…

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Gateway (NIU) Block Diagram and Operational Description Upstream Transmit PLL 265 Mhz 10 Mhz PLL 810-960 Mhz 335 Mhz 10 Mhz 70 Mhz 475-625 Mhz Downstream Port not used Radio Power Micro Processor Pulse Width Modulation from Micro Processor Vari-L Upconverter 70 Mhz PLL 498.5 Mhz 10 Mhz 950-2150 Mhz Downstream PortMicro Processor Mitel DVB NIM D A Digital Down Convert and Demod AGC Carrier_VCO Sym VCO 10 Mhz REED- SOLOMON ENCODER AND SYMBOL MAPPING FIR FILTER FIR FILTER INTERP FILTER D A COS( ω t) SIN( ω t) TIMING AND CONTROL STEL-1109 INTERP FILTER DDS DATA CLKEN DIFFEN DATAEN 153-160 MHz SCRMEN RDSLEN 70 MHz OUT PLL Symbol Rate Reference The transmission of a data burst by a gateway involves both digital and analog circuits. A data burst begins with an ATM cell being placed into one of the Utopia Arbiter (UA) FIFOs. This cell can originate with from the services card (Newbridge NIU-S, or STel TEC), or the cell can come from the 860 microprocessor (Ethernet, MAC, POTS, ISDN). The UA also contains a time slot map which is programmed by the 860 in response to downstream MAC messages from the headend. The time slot map is compared to the time reference which is broad…

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